Daniel Carleton Gajdusek bigraphy, stories - Nobel Prize-winning medical researcher

Daniel Carleton Gajdusek : biography

September 9, 1923 - December 12, 2008

Daniel Carleton Gajdusek (pronounced ; September 9, 1923 – December 12, 2008) was a Hungarian-Slovak-American physician and medical researcher who was the co-recipient (with Baruch S. Blumberg) of the Nobel Prize in Physiology or Medicine in 1976 for work on kuru, the first human prion disease demonstrated to be infectious.

In 1996, Gajdusek was charged with child molestation and after being convicted, spent 12 months in prison before entering a self-imposed exile in Europe, where he died a decade later.

Kuru

Gajdusek's best-known work focused on kuru. This disease was rampant among the South Fore people of New Guinea in the 1950s and 1960s. Gajdusek connected the spread of the disease to the practice of funerary cannibalism by the South Fore. With elimination of cannibalism, kuru disappeared among the South Fore within a generation.

Gajdusek was introduced to the problem of kuru by Vincent Zigas, a district medical officer in the Fore Tribe region of New Guinea. Gajdusek provided the first medical description of this unique neurological disorder, which was miscast in the popular press as the "laughing sickness" because some patients evinced risus sardonicus as a symptom. He lived among the Fore, studied their language and culture, and performed autopsies on kuru victims.

Gajdusek concluded that kuru was transmitted by the ritualistic consumption of the brains of deceased relatives, which was practiced by the Fore. He then proved this hypothesis by successfully transmitting the disease to primates and demonstrating that it had an unusually long incubation period of several years. He did this by drilling holes into chimps' heads and sticking pureed brain matter into the cerebellum. These animals then developed symptoms of kuru. This was the first demonstration of the infectious spread of a non-inflammatory degenerative disease in humans.

Kuru was shown to have remarkable similarity with scrapie, a disease of sheep and goats caused by an unconventional infectious agent. Subsequently, additional human agents belonging to the same group were discovered. They include sporadic, familial, and variant Creutzfeldt–Jakob disease. Though Gajdusek was not able to identify the exact biological nature of the infective agent that spreads kuru, further research of scrapie agent by Stanley Prusiner and others led to the identification of rogue proteins called prions as the cause of these diseases.

While Gajdusek's work is generally accepted by the medical community, some have questioned whether cannibalism was still practiced at the time of Gajdusek's research. Willam Arens, an anthropologist known for his criticism of reports of learned cannibalism, claims that Gajdusek never actually witnessed cannibalism himself. Researchers who worked with the Fore in the 1950s claimed that cannibalism was suppressed in 1948, almost a decade before Gajdusek arrived in New Guinea. Arens further alleges that the stories presented as evidence of Fore cannibalism often contradict each other and contain elements of sexism and racism. According to Arens, the decline of kuru coincided with the arrival of Europeans to the area in 1961, an event that caused many substantial changes in Fore life that could have led to the improvement in health conditions. Nevertheless, the problem is not cannibalism but the women using the grandfathers brain to rub on their children's babies skin. The last explanation given by Gajdusek before his death was that the women retained scraps of the brain under their nails, and that when they scratched the child's head looking for vermin, they then inoculated the disease. Rubbing the skin was not sufficient, according to him, for a transmission of kuru. The decline of kuru is linked to the establishment of schools and medical stations, due to the pressure exerted by Gajdusek upon the local Australian authorities, and that new villages were built with more modern amenities i.e. running water close to the houses.

In contrast, many other researchers, including Robert Klitzman, S. Lindenbaum, R. Glasse, and kuru field researchers at the Papua New Guinea Institute of Medical Research have documented reports that confirm the practice. Gajdusek became head of the laboratories for virological and neurological research at the National Institutes of Health (NIH) in 1958 and was inducted to the National Academy of Sciences in 1974 in the discipline of microbial biology.

Living octopus

Living octopus

In countries which are located near sea coasts, sea food is an important part of national cuisine