Category Archives: malaria

by | 7 June 2022 · 6:11 am

British vs. Japanese Tactics in Malaya, 1941

From Japan Runs Wild, 1942–1943, by Peter Harmsen (War in the Far East, Book 2; Casemate, 2020), Kindle pp. 22-24, 40:

The first troops which the Japanese encountered when disembarking on the Malay coastline were Indians, and Indian units remained their main opponent throughout the campaign. Britain used one part of its empire to defend another. Out of 31 Commonwealth battalions deployed on the Malay Peninsula, 18 were Indian, six were British, six were Australian, and one was Malay. A large number of Indian troops had originally been earmarked for the Middle East and had undergone training in Australia, specializing in tactics suitable for desert warfare. Now they were in the jungle. “One could argue that the Commonwealth troops in Malaya failed to unlearn the lessons of desert warfare in tropical conditions,” Indian military historian Kaushik Roy writes, “and failed to adopt the required tactical techniques for fighting effectively in the different ecological landscape.”

The poor preparation of the Commonwealth troops made the preparations carried out by the Japanese seem all the more impressive. As a matter of fact, the Japanese campaign in Malaya was a rush job, planned in less than a year by a small group of dedicated officers operating on a minimal budget, seeking information from whoever in the Japanese Empire might be a good source. An old sea captain who had spent many years plying routes in the areas Japan planned to invade provided details about weather patterns and coastal conditions. The Ishihara Mining Company had useful information about the geography of the Malay Peninsula. Professors at Taiwan University filled the group in on hygiene in the tropics and measures against malaria.

The Japanese, whose main experience with war had been on the Mongolian steppe and the rice fields of China, were no more used to jungle warfare than their Western counterparts, but they went into battle better prepared because of the questions that the planners asked, and found answers to. “What alterations had to be made in the organization of troops and the type of weapons and equipment used on the Siberian and Manchurian battlefields at twenty degrees below zero to meet requirements for fighting in the dense jungles of the tropics?” asked the planners, led by the capable but brutal officer Tsuji Masanobu. “How should tactics and strategy used against the Soviet Union be revised for action against British and American armies, and what comparisons could be made between the tactics, equipment and organization of Soviet, British, and American troops?”

The preparations paid off. The Japanese soldiers landing in Malaya were equipped for quick, decisive movements through terrain where modern roads were only sparse. They had light tanks, light trucks, and first and foremost bicycles. An Australian staff officer, C. B. Dawkins, concluded that the Japanese had, in fact, understood what the Westerners had not: “Jungle, forest and rubber areas are par excellence infantry country—every move is screened from air and ground observations, the value of fire of weapons of all natures is very limited, and troops on the offensive can close to within assaulting distance unmolested.”

By Christmas, Lieutenant General Arthur Ernest Percival, the overall commander of Commonwealth forces in Malaya, had to revise many previously held views of the Japanese foes, as he explained later: “It was now clear that we were faced by an enemy who had made a special study of bush warfare on a grand scale and whose troops had been specially trained in those tactics. He relied in the main on outflanking movements and infiltration by small parties into and behind our lines… his infantry had displayed an ability to cross obstacles—rivers, swamps, jungles, etc.—more rapidly than had previously been thought possible.”

Faced with a terrifying foe, the Commonwealth defenders went from underestimating the Japanese foes’ quality to overestimating their quantity. “A British soldier is equal to ten Japanese, but unfortunately there are eleven Japanese,” an injured Tommy told American correspondent Cecil Brown. The British Army in Malaya could not believe it was being beaten by the Japanese, and its members had to conjure up superior numbers to explain what happened to them. In fact, there were about twice as many British-led soldiers as there were Japanese. In Malaya as in all other major land campaigns that the Japanese waged early in the war, they invariably fielded numerically inferior troops, which nevertheless excelled in all other parameters.

…

National differences came out more clearly in the harsh jungle. The stiff pecking orders of the British military were maintained even in the primitive conditions, whereas the flat hierarchies of the Australians appeared to some observers more suited for the new strange environment. “The Australian Army is undoubtedly the world’s most democratic, and the troops in Malaya prove it,” wrote American correspondent F. Tillman Durdin, reporting how the salute resembled a “Hi, there” gesture. “An Australian officer can command his men only if he proves himself as good a man as any of his unit.”

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Filed under Australia, Britain, China, Japan, malaria, Malaysia, military, nationalism, South Asia, war

by | 2 May 2020 · 6:45 am

Malaria in Sicily, 1943

From The Day of Battle: The War in Sicily and Italy, 1943-1944, Volume Two of the Liberation Trilogy, by Rick Atkinson (Henry Holt, 2007), Kindle pp. 145-146:

In 1740, the writer Horace Walpole noted “a horrid thing called mal’aria” that afflicted Italy every summer. Before the war, the Rockefeller Foundation had published a sixteen-volume study on where the disease, which killed three million people each year, was most prevalent; Italy, infested with the mosquito Anopheles maculipennis—soon shortened to “Ann” in GI slang—had the highest malaria rates in the Mediterranean. Quinine had been used for centuries to suppress malaria’s feverish symptoms, but U.S. supplies came almost exclusively from cinchona trees in the East Indies, now controlled by the Japanese. American scientists seeking a substitute examined fourteen thousand compounds, including dozens tested on jailhouse volunteers; the best replacement proved to be a substance originally synthesized by the German dye industry and given the trade name Atabrine.

Soldiers detested the stuff, which they dubbed “yellow gall.” It tasted bitter, upset the stomach, turned the skin yellow, and was rumored to cause impotence and even sterility. Many soldiers stopped taking it, prophylactic discipline grew lax, and proper dosage levels were misunderstood. Moreover, some malaria control experts failed to reach Sicily until weeks after the invasion. Soldiers also grew careless about covering exposed skin in the evening. Protective netting was in short supply, and insect repellent proved ineffective: troops agreed “the mosquitoes in Sicily enjoyed it very much.”

More than a thousand soldiers afflicted with malaria in North Africa on the eve of HUSKY had been left behind when the fleets sailed. On July 23, doctors detected the first case contracted in Sicily. By early August thousands of feverish, lethargic soldiers had been struck down. Ten thousand cases would sweep through Seventh Army, and nearly twelve thousand more in Eighth Army. (The swampy Catania Plain was particularly noxious.) All told, the 15th Army Group sustained more malaria casualties than battle wounds in Sicily. A medical historian concluded that “the disease record of the Seventh Army on Sicily was one of the worst compiled by any American field army during World War II.” With soldiers also suffering from dengue, sandfly, and Malta fevers, distinguishing one malady from another became so difficult that many patients were diagnosed simply with “fever of unknown origin,” soon known to soldiers as “fuo.”

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Filed under Britain, Canada, Italy, Japan, malaria, Mediterranean, military, U.S., war

by | 1 September 2019 · 6:33 am

Quinine’s Role in Exploring Africa

From A Labyrinth of Kingdoms: 10,000 Miles through Islamic Africa, by Steve Kemper (W. W. Norton, 2012), Kindle pp. 310-311:

On October 29 [Heinrich Barth] heard that a British expedition had steamed up the Benue River. He had urged this mission on the government two years earlier but hadn’t heard a word about it since. He traced the rumor to a man in Kano who had seen the steamer on the Benue. Barth questioned him closely and was convinced that the rumor was true.

Barth wouldn’t know the details for many months. The mission had left Britain in early June 1854. When its commander died soon after the boat reached the island of Fernando Po in the Gulf of Guinea, Dr. William Balfour Baikie assumed command. Baikie, who later became Barth’s friend and supporter, took the 100-foot steamer Pleiad up the Niger for 700 miles. In early August the Pleiad entered the Benue and ascended it for 250 miles. At the end of September Baikie turned around, reaching the Niger on October 20, while Barth was in Kano. By February 1855 the Pleiad was home.

Every previous excursion on the Niger had proven deadly to Europeans, mostly because of fever. But the Pleiad’s entire crew—twelve Europeans and fifty-four Africans—survived because of an experimental therapy—prophylactic doses of quinine. This success altered the course of African exploration. The voyage also proved Barth’s conviction that the heart of Africa could be opened to commerce through navigation of the Niger’s watershed.

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Filed under Africa, Britain, Cameroon, disease, Europe, malaria, Nigeria, travel

by | 23 February 2019 · 11:07 am

Unchanged Calcutta

From The Epic City: The World on the Streets of Calcutta, by Kushanava Choudhury (Bloomsbury, 2018), Kindle Loc. approx. 320-340:

Everything that could possibly be wrong with a city was wrong with Calcutta. The city is situated between a river and a swamp. Its weather, Mark Twain had said, ‘was enough to make a brass doorknob mushy.’ For six months out of the year, you are never dry. You take two to three showers a day to keep cool, but start sweating the moment you turn off the tap. The dry winter months, when I arrived, were worse. I woke up some mornings feeling my chest was on fire. Breathing in Calcutta, Manash, the neighbourhood doctor told me, was like smoking a pack of cigarettes a day. Keeping the dust and grime off my body, out of my nails, hair and lungs was a daily struggle. Then there were the mosquitoes, which arrived in swarms at sundown and often came bearing malaria.

I could look forward to the monsoons, of course, when floodwaters regularly reached your waist in parts of the city. When they weren’t flooded, the streets were blocked by marches, rallies, barricades and bus burnings, all of which passed for normal politics in the city. Staying cool, dry, healthy and sane took up so much effort that it left little enthusiasm for much else.

Nothing had changed since my childhood. The paanwallas still ruled the street corners, perched on stoops with their bottles of soft drinks and neatly arrayed cigarette packets. On the streets, the pushers and pullers of various types of carts still transported most of the city’s goods. The footpaths were still overrun by hawkers selling bulbous sidebags, shirts, combs, peanuts in minuscule sachets, onion fritters and vegetable chow mein. The mildewed concrete buildings, the bowl-shaped Ambassador taxis, the paintings on the backs of buses, the ubiquitous political graffiti, the posters stuck onto any flat surface, the bazaars full of squatting fish sellers, the tea shop benches on the sidewalks, the caged balconies of the middle classes, the narrow entrails of corrugated slums, nothing had changed, not even the impassive expressions on the faces of clerks. The city was in its own time zone.

It was not a happy time. Calcutta was in its twenty-third year of Communist rule, its third decade of factory closures. Until the 1970s it had been the largest and most industrialised city in India but had now been eclipsed in population and prosperity by Bombay and Delhi. The only reason politicians seemed to visit the city any more was to pronounce its death.

Since the early 1990s, life in other parts of India had been improving for people like us, the educated few. The government had loosened its hold over the economy, and dollars were flowing into the American back offices and call centres located in Bangalore and Hyderabad. Countless college-educated young men and women, including many of my cousins, had fled Calcutta for these boomtowns.

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Filed under disease, economics, India, industry, labor, malaria, migration

by | 15 May 2017 · 9:50 pm

German East Africa Import Substitutions

From African Kaiser: General Paul von Lettow-Vorbeck and the Great War in Africa, 1914-1918, by Robert Gaudi (Caliber, 2017), Kindle Loc. 3843-3870:

The British blockade of German East Africa—challenged briefly by Königsberg before she hightailed it up the Rufiji—was nearly a complete success. Shortages of basic necessities made themselves painfully felt everywhere. The colonists soon lacked adequate supplies of soap, toothpaste, candles, fuel, beer, booze, rubber, cloth, chocolate, castor oil, and, most important, quinine, without which life in the tropics became impossible for Europeans. One or two blockade runners reached the Swahili Coast after many ha[r]dships—notably the Krönborg-Rubens and the Marie von Stettin—but these were heroic exceptions. The aim of any blockade—complete starvation of the enemy—seemed within reach of the British Royal Navy for the first few months of 1915.

Then, with the begrudging help of Governor Schnee, still stewing away at Morogoro, von Lettow organized the colony to produce some of the most needed items. German East Africa, rich in natural resources, mostly lacked the necessary infrastructure—factories, refineries, laboratories, warehouses—to turn these resources into commercial goods. But presently, the colonists took it upon themselves to manufacture a variety of products for both civilians and Schutztruppe—now reaching its peak popularity as patriotic enthusiasm, fueled by the victory at Tanga, swept the colony.

Planters’ wives revived the neglected art of spinning using native cotton; African women, given scratch-built looms, wove bolts of cloth. Between them, they more than made up for the lack of imported fabric. Leather torn from the backs of native buffalo herds and tanned using chemicals extracted from the colony’s plentiful mangrove trees got cobbled into the boots so critical for the Schutztruppe—soon to march unimaginable distances over rough landscapes, much of which could not be traversed barefoot. Candles materialized from tallow; rubber from tapped trees: carefully dripped along rope, the raw, milky stuff was then hand-kneaded into tires for GEA’s few automobiles, including von Lettow’s staff car. A kind of primitive, homemade gasoline called trebol powered these vehicles—it was a by-product of distillates of copra, which also yielded benzene and paraffin. Soap came from a combination of animal fat and coconut oil. Planters and small businessmen eventually produced 10,000 pounds of chocolate and cocoa and 3,000 bottles of castor oil. Meanwhile, new factories sprang up in Dar es Salaam to make nails and other metal goods, including some ammunition. Rope woven from pineapple fiber proved both durable and less susceptible to rot than hempen rope from Germany; cigars and cigarettes rolled from native-grown tobacco made their way into every soldier’s kit. At Morogoro and elsewhere, home brewers distilled schnapps and moonshine. The latter, at 98 proof and optimistically labeled “whiskey,” was issued to the troops as part of their basic rations.

All this ingenuity, however, would be rendered useless without quinine. Before the war, the colony had gotten its supply from distributors in the Dutch East Indies, now cut off by the blockade. Dwindling supplies meant European populations of the colony would have no defense against their greatest enemy—not the British or rebellious natives but the malaria-bearing anopheles mosquito. At von Lettow’s urging, the famous biological research center at Amani turned its chemists to developing a quinine substitute in their laboratories. The chemists researched furiously, tried formulations of this and that, and at last came up with an effective type of liquid quinine distilled from cinchona bark. Called “von Lettow schnapps” by his men, this foul-tasting, much-reviled elixir nevertheless met most of the army’s needs for the next year or so.

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Filed under Britain, economics, food, Germany, industry, Kenya, malaria, migration, military, nationalism, Tanzania, war

by | 30 March 2014 · 7:38 am

Malaria Killed More than Combat in PNG

From Hell’s Battlefield: The Australians in New Guinea in World War II, by Phillip Bradley (Allen & Unwin, 2012), Kindle Loc. 4885-4905:

From the moment the Australians flew into Nadzab, they were under insidious assault. Carried by the fragile mosquito, malaria could fell and even kill the strongest of men, and the Ramu Valley, the valley of death in the local dialect, had one of the highest incidences in the country.

The traditional treatment was with quinine, but 90 per cent of the world’s supply came from cinchona-tree plantations in Java, which was now under Japanese occupation. After the 252 Lark Force escapees ran out of quinine on New Britain in early 1942, fifty died within five weeks and most of the remainder needed hospitalisation. An alternative malaria suppressant had to be found or it would be impossible to maintain troops in northern Australia, let alone New Guinea. Atebrin, a synthetic version of quinine that had been developed in Germany before the war, became the Australian Army’s official antimalarial drug, and what quinine remained was reserved for treatment. Australian scientists helped develop practical methods of synthesising Atebrin and pinpointed the dosage that most effectively suppressed malaria among deployed troops. In New Guinea, wearing protective clothing, using mosquito nets, spraying, improving drainage and of course taking the bittertasting Atebrin pills became as important as any combat discipline.

Malaria is not found above elevations of about 1000 metres, but most of the fighting in New Guinea took place along the coast or in the lowlands of the Markham and Ramu Valleys. High rainfall increased the opportunities for mosquitoes to breed, so the relatively dry area around Port Moresby was less dangerous than Milne Bay and the Papuan beachheads, where malaria was rampant. From October 1942 to April 1943, malaria caused almost five times more casualties than combat did. Even that was not the full story, as most affected men had recurrences of the disease after returning to Australia. The highly malarial environment of the Ramu Valley almost crippled the Australian campaign. Almost 1 in 10 of the operational troops were falling ill with malaria each week, meaning that within eleven weeks almost all would be infected. There were other diseases, some—such as scrub typhus—much deadlier, but malaria accounted for 90 per cent of losses due to disease. As a result of the scientists’ studies, the daily Atebrin dose was doubled, and the infection rate fell by about two-thirds. For Japanese troops in New Guinea, malaria was also a serious problem. Though they had stocks of quinine, the progressive breakdown of their supply system meant that almost all frontline troops were infected with malaria, and deaths from it increased as the war went on.

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Filed under Australia, disease, drugs, Japan, malaria, military, Papua New Guinea, war

by | 29 March 2014 · 8:52 am

The Japanese Retreat from Lae, PNG

From Hell’s Battlefield: The Australians in New Guinea in World War II, by Phillip Bradley (Allen & Unwin, 2012), Kindle Loc. 4518-4577:

After the loss of the Bismarck Sea convoy the previous March, the Japanese command in Lae had seen the writing on the wall and made contingency plans for evacuation. As part of those preparations, the engineering unit of Lieutenant Masamichi Kitamoto had orders to blaze a land route across the Huon Peninsula to Lae. At the 1932 Olympic Games in Los Angeles, Kitamoto had run for Japan. Now he would again be asked to use his legs for his country. A week after the loss of the Lae convoy, his fifty-man detachment from the 30th Regiment Independent Engineers crossed the Vitiaz Strait from Tuluvu, on the western tip of New Britain, and landed on the New Guinea mainland. With a native guide, the heavily burdened engineers set out to cross the Saruwaged Range to Lae. ‘It was just like climbing a slide from the bottom to the top,’ Kitamoto wrote later. ‘You had to bend forward deeply to bring the centre of gravity before you. It was as if someone had put a heavy weight on our heads and [was] pulling our legs at the same time.’ It only got worse: ‘The incline kept going up and up into the skies. Our legs grew stiff and we gasped for breath . . . Gazing at the clouds below us, we continued the march up the sharp incline . . . It was so cold that it seemed that our hands which grasped the rocks to pull us up would become frozen.’ At 4500 metres, Kitamoto’s engineers crossed a summit higher than Mount Fuji in Japan. Almost as testing was the descent down the other side. The expedition to Lae took three weeks, but when Kitamoto reported to Lieutenant General Hidemitsu Nakano’s headquarters on 3 April, just a month after the Bismarck Sea debacle, Nakano had his escape route.

Now it was mid-September, and the Japanese situation in Lae was desperate as Kitamoto again reported to Nakano’s headquarters. When the young lieutenant entered, Nakano was in conference with his key officers, poring over a map spread across the table. Kitamoto soon learned that Nakano had ordered a retreat: there would be no final battle for Lae. Civilian employees had already left, beginning their trek on 4 September. For the troops who remained, there were two potential routes: across the Saruwaged Range to the north coast, or through the foothills of the Finisterre Range, parallel to the Markham Valley. Having traversed both, Kitamoto was asked for his opinion. ‘The second plan is impossible,’ he told Nakano, knowing that Allied aircraft could easily interdict a route through the kunai grass that covered the foothills. Kitamoto continued: ‘The first plan is difficult, but there is still some chance of success. If I had to make the final decision I would choose Plan 1. However, the sacrifice will be great.’ The die was cast: the order was issued.

The first group of Japanese soldiers, about 2000 naval troops including Kitamoto’s men, set off from Lae on 12 September, making their way inland along the west bank of the Busu River. They formed one of four groups, totalling 8650 men, headed for the high mountains with enough rations to last ten days. Intermediate supply dumps were established north of Gawan and at Iloko. The first and third groups went into the mountains via Gawan, the second and fourth groups via Kemen. Kitamoto’s engineers led the way, setting up signposts and repairing the track as they went. They crossed the Busu about 3 kilometres upstream from the now fallen kunda bridge. General Nakano travelled with the second group, which halted at the Busu for three days while a new bridge was constructed. The final organised group left Lae on 15 September.

Shigeru Horiuchi, a twenty-two-year-old private with III/238th Battalion, had arrived in Lae only a week before the Australian invasion. Since then, his unit had gone through ‘two weeks of hell,’ under constant attack from Allied bombers; ‘even the officers were trembling in funk holes and had no taste for fighting.’ Horiuchi’s company did not leave Lae until 17 September, but Horiuchi was soon forced to drop out because of a leg wound. He was captured a few days later sheltering in a native village 25 kilometres north of Lae.

In the first days of the trek, 200 men had died, mostly wounded and sick. ‘The mountains were only 500 metres high and this much casualties,’ Kitamoto observed with dismay. ‘How many will die before we clear Mt. Sarawaket, which is 4500 metres high? The sharp precipices rising before us will take many victims.’ Once the track began to rise, ‘the soldiers helped each other along, the strong carrying the rifles of weak men. However, as they grow tired, even the strong began to discard their rifles.’ Kitamoto ordered that any discarded weapons should have the chrysanthemum insignia filed off because ‘it was humiliating to throw away the arms that belong to the emperor.’

As the men weakened, the incidence of malaria increased and more men dropped out. In the first 1500 metres of the climb after leaving Kemen, 500 men died. Steep precipices dropped away on both sides of the track. ‘After we escaped the clutches of the enemy we were confronted by nature,’ Kitamoto wrote. Those who lived also confronted the corpses of those who died. ‘Using the dead bodies as stepping stones and clinging to the slippery lichen-covered rocks, the men made their way up the mountain. Fresh red blood ran from the mouths of the dead when they were stepped on and their glassy eyes stared us in the face.’ Approaching 4000 metres, the cold bit hard into lightweight tropical uniforms; though exhausted, the men were afraid to fall asleep lest they freeze to death. Another 800 men died crossing the top of the range. ‘The screaming voices of the men who slipped from the log bridges to their death in the canyons below, the wailing cries of the men who could move no more and were asking for help . . . it was a sense of hell, something quite out of this world.’

By now the rations had gone. Starving, some men ate human flesh. As he approached the summit of Mount Saruwaged, Kitamoto saw that ‘in the shadow of the rocks, three soldiers had pinned a trooper to the ground while one of them stabbed him in the heart with his bayonet. There were no signs that the dead man had asked the others to kill him. The remaining three soldiers cut slices of the dead trooper’s thigh and began to devour the human flesh.’ After Kitamoto shouted at them, ‘the men looked in my direction, flies that gathered about dead meat swarmed about their faces but they had no strength to drive them away. They had become mad with hunger and fatigue.’ Kitamoto covered the corpse and moved on.

In the end even Kitamoto’s strength gave out, and he was carried to the coast on a stretcher. He reached Kiari, some 20 kilometres west of Sio, twenty days after leaving Lae. Staff Officer Sugiyama told him: ‘I wish to bow my head in gratitude for your strong legs. Your legs saved the whole division.’ Once he recovered, Kitamoto headed back to the top of the range to help the stragglers reach the coast. The last stretcher case was brought in on 15 November. An 18th Army report showed that of the 8650 who had left Lae, 6417 survived—a loss of over 25 percent. Most of the survivors staggered into Kiari suffering from malnutrition and malaria. Although only 1271 of them were officially classified as ‘sick,’ Kitamoto wrote that all the men ‘were a group of invalids . . . in no condition to fight.’

Even on the coast, safety was not assured: three men died as they rested on the beach, crushed by a falling coconut tree. ‘At second look, I discovered that they were the men who became mad and ate their comrade during the march,’ Kitamoto wrote. His right-hand man, the native guide Rabo, also knew what these men had done. ‘Those soldiers no good,’ he told Kitamoto as he stared at the three dead men. ‘They eat friend. God punish them.’ As Rabo turned away, Kitamoto felt a shiver run down his spine.

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Filed under Australia, disease, food, Japan, malaria, military, Papua New Guinea, war

by | 14 March 2009 · 12:09 pm

Mosquitoes to Mars?

A few weeks ago, RIA Novosti reported on a type of mosquito that seems preadapted to the possibility of suspended animation during long space flights.

Cosmonauts who might fly to the Red Planet are learning how to survive in a forest outside Moscow. Scientists from the Russian Academy of Sciences’ Institute of Medical and Biological Problems are assessing the impact of cosmic radiation on living organisms, one of which even managed to survive in outer space.

Anatoly Grigoryev, vice president of the Russian Academy of Sciences, told RIA Novosti that a mosquito had managed to survive in outer space. First, it appeared that Grigoryev was talking about a spider running loose aboard the International Space Station. Incredibly, a mosquito slept for 18 months on the outer ISS surface. “We brought him back to Earth. He is alive, and his feet are moving,” Grigoryev said.

The mosquito did not get any food and was subjected to extreme temperatures ranging from minus 150 degrees Celsius in the shade to plus 60 degrees in the sunlight.

Grigoryev said the insect had been taken outside the ISS on orders from the Institute’s scientists working on the Biorisk experiment. “First, they studied bacteria and fungi till a Japanese scientist suggested studying mosquitoes,” Grigoryev told RIA Novosti….

“Professor Takashi Okuda from the National Institute of Agro-Biological Science drew our attention to the unique, although short-lived, African mosquito (bloodworm), whose larvae develop only in a humid environment,” Grigoryev said.

Rains are rare in Africa, where puddles dry up before one’s eyes. However, this mosquito is well-adapted to adverse local conditions, existing in a state of suspended animation when vital bodily functions stop almost completely.

When suspended animation sets in, water molecules are replaced by tricallosa sugar, which leads to natural crystallization. The larvae were then sprayed with acetone, boiled and cooled down to minus 210 degrees Celsius, the temperature of liquid nitrogen. Amazingly, they survived all these hardships.

The Japanese also studied bloodworm DNA and found that it could be switched on and deactivated in 30 to 40 minutes. “This is facilitated by the crystallization of biological matter,” Doctor of Biology Vladimir Sychev from the Institute of Medical and Biological Problems told RIA Novosti.

If Anopheles mosquitoes can do the same, it may not take long for the first humans settlers on Mars to melt some of its ice and turn barren landscapes into malarial swamps.

via Japundit

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Filed under Africa, Japan, malaria, Russia, science

by | 15 September 2006 · 5:49 pm

WHO Endorses DDT Use Indoors

Saturday’s Washington Post reports:

The World Health Organization reversed a 30-year-old policy yesterday and declared its support for indoor use of the pesticide DDT to control mosquitoes in regions where malaria is a major health problem.

The Geneva-based WHO, which provides advice to many developing countries, believes the benefits of the long-acting pesticide far outweigh any health or environmental risk it may pose….

The endorsement is only for once- or twice-yearly spraying of the pesticide on the inside walls of dwellings, especially mud and thatched huts. Used that way, DDT functions as both an insect repellent and — when a blood-engorged female mosquito lands on the wall to digest its meal — an insecticide.

One application costs about $5. Most of that cost is labor, as it is sprayed on by professional applicators, and each packet of the pesticide must be strictly accounted for.

About 1 million people die each year of malaria, most of them African children under age 5. …

Numerous countries in southern Africa use DDT, but the compound is generally not used in central and west Africa, which have more intense malaria transmission, said Shiva Murugasampillay, a physician at WHO in Geneva.

DDT was the chief chemical villain of Rachel Carson’s book “Silent Spring,” whose publication in 1962 helped nurture the modern environmental movement. The chemical was banned in the United States in 1972, and its use worldwide fell steeply after that. It is no longer used in agriculture.

A study in Zambia in 2000 found that when all houses in a neighborhood were sprayed, malaria incidence fell 35 percent compared with years when none was sprayed.

Swaziland and Madagascar each had malaria epidemics after suspending DDT spraying, the latter’s outbreak killing more than 100,000 people from 1986 to 1988. Both epidemics were stopped when DDT spraying resumed.

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by | 6 January 2006 · 10:21 pm

Good News on the Malaria Front

The NewsHour on 4 January carried a fascinating (to me) report about some real progress on the malaria front in Africa: a WHO-backed experiment to manufacture and distribute mosquito nets impregnated with slow-decay insecticide.

JONATHAN SNOW: How the Olyset long life nets are made is another part of this story.

The AtoZ factory is a huge complex in the northern Tanzania city of Arusha. Mosquito netting in vast profusion being produced by Africans, for Africans, African workers, 1,200 of them quite literally saving other Africans’ lives.

The engineers are Chinese. The technology is Japanese. The labor is African. And the money to purchase the completed nets is international.

In sum total, this is the global partnership to roll back malaria. And already this one factory is producing three million nets a year. But this is no place of altruism. This is a vigorously commercial enterprise.

The resin for the yarn comes from ExxonMobil in Saudi. They give the sum AtoZ pays for it back to UNICEF to buy still more nets.

The Japanese pharmaceutical company Sumitomo sells the magic long-life insecticide ingredients to AtoZ but has donated a free and vital technology transfer.

Inside each of these white pellets is insecticide which will bleed out of the yarn over five years.

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