Web hosting linux - Bancroftian filariasis in the Igwun basin, Nigeria: an
Bancroftian filariasis in the Igwun basin, Nigeria: an epidemiological, parasitological, and clinical study in relation to the transmission dynamics. Udonsi X Department of Zoology, Faculty of Science, University of Port Harcourt. Folia Parasitol (Praha) (CZECHOSLOVAKIA) 1988, 35 (2) p147-55, ISSN A 12-months study on bancroffian filariasis was carried out in the Igwun basin, Nigeria. A total of 1,418 individuals (768 males, and 650 females) were examined for microfilaremia and clinical filarial stigmata. There were 14.3% and 11.1% male and female point prevalence rates, respectively, and an overall prevalence of 12.8%. Prevalence rates and microfilarial density increased with age. The highest mff density of 35 mff/20 ml blood occurred in the 40-49 year old male individuals. Disease rates of 55.5 and 65.3% were recorded for males and females respectively. Chyluria (9.3% males, 16.7% females), hydrocele (17.8%), elephantiasis (15.9% males, 29.2% females), and enlarged groin glands (16.4% males, 19.4% females) were the major clinical signs, all associated with microfilaremia. Anopheles gambiae and Cules pipiens were the principal vectors. The estimated mean daily, weekly, and monthly per capita biting densities were 26, 16 1, and 753 respectively. The overall infection rate of mosquitoes was 22.3%, with a mean mff density of approximately 5 mff/mosquito. These vector parameters were indicative of active transmission in the area, and may be responsible for the high prevalence of infection, the diversity of clinical signs, and high morbidity rates. Bancroftian filariasis in the Igwun Basin, Nigeria. An epidemiological, parasitological, and clinical study in relation to the transmission dynamics. Udonsi X Department of Zoology, Faculty of Science, University of Port Harcourt, Nigeria. Acta Trop (SWITZERLAND) Jun 1988, 45 (2) p171-9, ISSN 0001-706X A 12-month field and laboratory study was carried out to determine the epidemiology, clinical features, and transmission dynamics of bancroftian filariasis in the Igwun Basin, Nigeria. A total of 1,418 individuals (768 males, and 650 females) were examined for clinical signs of filariasis. 690 day provocative blood samples (DPS), and 728 night blood samples (NBS) were examined for microfilaremia. 14.3 % of males and 11.1 % of females were mf positive. 5.8% of DPS, and 19.5% of the NBS were mf positive. An overall microfilaria rate of 12.8% was recorded in the basin. Prevalence and microfilarial density increased with age. The highest average density of 35 mf/20 ml NBS occurred in the 40-59-year-old male individuals. The mean microfilarial density in DPS and NBS were 7.9 and 28.0 per 20 ml blood in males, respectively, and 6.2 and 20.0 per 20 ml DPS and NBS in females, respectively. Disease rates of 55.5% were recorded for males, and 68. 1 % for females. The clinical signs observed were: Chyluria (9. 1 % for males, 16.7% for females); hydrocele (15.5%); elephantiasis (15.5% in males, 29.2% in females); and enlarged groin glands (15.5% in males, 22.2% in females). All clinical signs were associated with microfilariae. Anopheles gambiae s.I., and Culex pipiens s.I. were the two mosquito vectors identified. The estimated mean annual biting rates were 5508 and 10448 for A. gambiae s.I. and C. pipiens s.I., respectively. Their respective mean infection rates were 21.7% for A. gambiae s.l. and 22.7% for C. pipiens s.I.; with microfilarial densities of 4.1 and 6.6.(ABSTRACT TRUNCATED AT 250 WORDS) Part I-22
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