An Epidemiological Study of Soil-Transmitted Helminthiases in Rural Nigeria

Fraser, Nicola (1990) An Epidemiological Study of Soil-Transmitted Helminthiases in Rural Nigeria. MSc(R) thesis, University of Glasgow.

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A total of 1412 faecal samples were collected in March 1989 from four rural villages in Oyo State, Nigeria. The overall percentage prevalences of Ascaris lumbricoides, Trichuris trichiura and hookworm (assumed to be Necator americanus) were 70.0%, 69.2% and 59.1% respectively. There were significant differences between the infection prevalence values and host age groups for each helminth. Children were found to be highly infected, particularly those aged between 5 and 9 years. Significant sex-related differences were observed between hosts. A lower prevalence of hookworm infection was found in females compared with males. There was a strong positive association found between Trichuris trichiura and hookworm infection. Triple infections (Ascaris lumbricoides, Trichuris trichiura and hookworm) were seen to be more prevalent than single infections in all four villages. Significant differences in infection intensity were detected between various age groups for each helminth species. The frequency distribution of numbers of worms per host was investigated for each species of helminth in each village on the basis of faecal egg counts. Evidence was obtained to show that A. lumbricoides and T. trichiura were overdispersed in all 4 villages and that hookworm showed some degree of overdispersion in Alakowe and Akeredolu.

Item Type: Thesis (MSc(R))
Qualification Level: Masters
Keywords: Epidemiology, Parasitology
Date of Award: 1990
Depositing User: Enlighten Team
Unique ID: glathesis:1990-78168
Copyright: Copyright of this thesis is held by the author.
Date Deposited: 28 Feb 2020 12:09
Last Modified: 28 Feb 2020 12:09

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