Biomaterial Database

Prevalence and intensity of Schistosoma haematobium and S. mansoni infection in Qalyub, Egypt. 1977

M A El Alamy, and B L Cline

We report the preliminary findings of a comprehensive schistosomiasis survey in the Qalyub region of the Nile Delta. A systematic sample of households in eight villages was studied, and 8,712 individuals submitted stool and urine specimens for parasitologic examinations. The prevalence of Schistosoma mansoni infection (40.5%) was much higher than that reported previously in this area, and the prevalence of S. haematobium (27%) was much lower. The geometric mean egg output for both parasites was surprisingly low. The apparent increase in S. mansoni infection may be largely due to the use of a very sensitive parasitologic technique, but the decrease in S. haematobium prevalence is unexplained. Preliminary results of snail surveys, however, indicate a profound decrease in the population levels of Bulinus species, a phenomenon which may be related to ecological changes since construction of the Aswan High Dam.

UI	MeSH Term	Description	Entries
D002033	Bulinus	A genus of small freshwater snails of the order Pulmonata, found throughout Africa and the Middle East, where it is a vector of SCHISTOSOMA HAEMATOBIUM.
D004197	Disease Reservoirs	Animate or inanimate sources which normally harbor disease-causing organisms and thus serve as potential sources of disease outbreaks. Reservoirs are distinguished from vectors (DISEASE VECTORS) and carriers, which are agents of disease transmission rather than continuing sources of potential disease outbreaks. Humans may serve both as disease reservoirs and carriers.	Disease Reservoir,Human Disease Reservoirs,Infectious Disease Reservoir,Reservoirs of Infection,Infectious Disease Reservoirs,Disease Reservoir, Human,Disease Reservoir, Infectious,Disease Reservoirs, Human,Human Disease Reservoir,Infection Reservoir,Infection Reservoirs,Reservoir, Disease,Reservoir, Infectious Disease,Reservoirs, Human Disease
D004534	Egypt	A country in northern Africa, bordering the Mediterranean Sea, between Libya and the Gaza Strip, and the Red Sea north of Sudan, and includes the Asian Sinai Peninsula Its capital is Cairo.	Arab Republic of Egypt,United Arab Republic
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012548	Schistosoma haematobium	A species of trematode blood flukes of the family Schistosomatidae which occurs at different stages in development in veins of the pulmonary and hepatic system and finally the bladder lumen. This parasite causes urinary schistosomiasis.	Schistosoma haematobiums,haematobiums, Schistosoma
D012550	Schistosoma mansoni	A species of trematode blood flukes of the family Schistosomatidae. It is common in the Nile delta. The intermediate host is the planorbid snail. This parasite causes schistosomiasis mansoni and intestinal bilharziasis.	Schistosoma mansonus,mansonus, Schistosoma
D012552	Schistosomiasis	Infection with flukes (trematodes) of the genus SCHISTOSOMA. Three species produce the most frequent clinical diseases: SCHISTOSOMA HAEMATOBIUM (endemic in Africa and the Middle East), SCHISTOSOMA MANSONI (in Egypt, northern and southern Africa, some West Indies islands, northern 2/3 of South America), and SCHISTOSOMA JAPONICUM (in Japan, China, the Philippines, Celebes, Thailand, Laos). S. mansoni is often seen in Puerto Ricans living in the United States.	Bilharziasis,Katayama Fever,Schistoma Infection,Bilharziases,Fever, Katayama,Infection, Schistoma,Infections, Schistoma,Schistoma Infections,Schistosomiases