An integrated view of entomological and parasitological observations on falciparum malaria in Gambela, Western Ethiopian Lowlands

dc.contributor.author Krafsur, E.S.
dc.contributor.author Krafsur, Elliot
dc.contributor.author Armstrong, J. C.
dc.contributor.department Entomology
dc.date 2018-02-19T06:26:21.000
dc.date.accessioned 2020-06-30T02:24:15Z
dc.date.available 2020-06-30T02:24:15Z
dc.date.issued 1978
dc.description.abstract <p>A 14-month longitudinal malaria survey was performed among the Nilote inhabitants of Gambela, a small garrison town in Illubabor Province, Ethiopia. The results are integrated with a simultaneously performed entomological study. Monthly variation in <em>Plasmodium falciparum</em> prevalence was primarily a result of seasonal fluctuation in risk of sporozoite inoculation from <em>Anopheles arabiensis</em> (= <em>gambiae</em> species B), <em>A.funestus</em>, and <em>A. nili</em>. The proportion of sporozoite inoculations actually infective was estimated, assuming a constant recovery rate, by employing Macdonald's formulae. Inoculation (incidence) rates calculated from progressive increase and decrease in <em>P. falciparum</em> prevalence were then taken as fractions of entomologically measured ‘crude’ inoculation rates. Among children, values of 7 to 27% were obtained, the higher occurring in the first quarter of the wet season. Estimates among adults were approximately half those for children, illustrating the more competent immune state of the older age group.</p> <p>Using the methods of Bekessy<em>et al.</em> (1976), incidence and recovery were estimated on the basis of transition rates (parasite negative to positive; positive to negative) derived from a group of inhabitants examined at 28-day intervals. Incidence rates were estimated to be two-fold greater among children than adults; recovery rates were about three-fold greater among adults than children.</p>
dc.description.comments <p>This article is published as Krafsur, E. S., and J. C. Armstrong. "An integrated view of entomological and parasitological observations on falciparum malaria in Gambela, Western Ethiopian Lowlands." <em>Transactions of the Royal Society of Tropical Medicine and Hygiene</em> 72, no. 4 (1978): 348-356. doi: <a href="https://doi.org/10.1016/0035-9203(78)90125-6" target="_blank" title="Persistent link using digital object identifier">10.1016/0035-9203(78)90125-6</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/ent_pubs/442/
dc.identifier.articleid 1442
dc.identifier.contextkey 11269288
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath ent_pubs/442
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/24068
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/ent_pubs/442/1978_Krafsur_IntegratedView.pdf|||Sat Jan 15 00:18:29 UTC 2022
dc.source.uri 10.1016/0035-9203(78)90125-6
dc.subject.disciplines Community Health and Preventive Medicine
dc.subject.disciplines Entomology
dc.subject.disciplines Epidemiology
dc.subject.disciplines Parasitic Diseases
dc.title An integrated view of entomological and parasitological observations on falciparum malaria in Gambela, Western Ethiopian Lowlands
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 85d1fdbf-0f97-46bb-a01d-9f769db1b921
relation.isOrgUnitOfPublication f47c8cad-50be-4fb0-8870-902ff536748c
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