1/4. light, long-lasting Necator infection in a volunteer.A Necator infection produced by percutaneous exposure of a volunteer to three larvae was followed with periodic egg counts for 4 months beyond 18 years when passage of eggs in the feces ceased permanently. During the 2nd year of infection, there was unintentional exposure to two additional larvae. Egg counts per gram of feces (EPG) were approximately 1,000 during the 1st year, 1,500 over the next 5 years, and less than or equal to 200 over the final 3 years, during which time there were 6 periods of approximately 1 month each when Kato thick-smear examinations revealed no eggs. During 6 of the 1st 14 years, when egg counts were done by the standard direct smear method, up to 37% of the eggs were infertile. Based on the assumption that two female worms were present during the 1st year, three during the next 3 years or more, and only one during the final 3 years, the estimated output per female in this light infection was 500 EPG in the worm's prime of life, and less than 200 EPG in the final year of the 17 or 18 year life span. ( info) |
2/4. Massive intestinal haemorrhage leading to exploratory laparotomy in a child with hookworm infection.A case of necator americanus infection associated with massive intestinal hemorrhage is reported. This is believed to be the first report in thailand. ( info) |
3/4. Transmammary transmission of necator americanus larva in the human host.The prevalence of necator americanus in the 128 nursing mothers at Saraburi hospital was 61%. The examination of milk from these mothers revealed the presence of N. americanus in one case. The finding suggested that milk could be a potential source of hookworm infection in man. ( info) |
4/4. Transmammary passage of strongyloides sp. larvae in the human host.The prevalence of infection with strongyloides fuelleborni and hookworms (ancylostoma duodenale and necator americanus), and the possible transmammary passage of these parasites, was studied in the people of a village in Bulape, Zaire, africa. Stool examinations revealed that 34% of 76 infants under 200 days of age were infected with S. fuelleborni and 8% were infected with hookworms. infection rates in the general population were 44% for S. fuelleborni and 90% for hookworms. The examination of milk from nursing mothers revealed the presence of strongyloides larvae in one case. The finding suggests that S. fuelleborni may be transmitted via the milk in humans. ( info) |