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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
immunology and microbiology
Transmission dynamics of the Echinococcus granulosus sheep-dog strain (G1 genotype) in camels in Tunisia
Veterinary Parasitology, Volume 121, No. 1-2, Year 2004
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Description
Cystic echinococcosis, caused by Echinococcus granulosus, is highly endemic in North Africa and the Middle East. This paper examines the abundance and prevalence of infection of E. granulosus in camels in Tunisia. No cysts were found in 103 camels from Kébili, whilst 19 of 188 camels from Benguerden (10.1%) were infected. Of the cysts found 95% were considered fertile with the presence of protoscolices and 80% of protoscolices were considered viable by their ability to exclude aqueous eosin. Molecular techniques were used on cyst material from camels and this demonstrated that the study animals were infected with the G1 sheep strain of E. granulosus. Observed data were fitted to a mathematical model by maximum likelihood techniques to define the parameters and their confidence limits and the negative binomial distribution was used to define the error variance in the observed data. The infection pressure to camels was somewhat lower in comparison to sheep reported in an earlier study. However, because camels are much longer-lived animals, the results of the model fit suggested that older camels have a relatively high prevalence rate, reaching a most likely value of 32% at age 15 years. This could represent an important source of transmission to dogs and hence indirectly to man of this zonotic strain. In common with similar studies on other species, there was no evidence of parasite-induced immunity in camels. © 2004 Elsevier B.V. All rights reserved.
Authors & Co-Authors
Lahmar, Samia
Tunisia, Sidi Thabet
Ecole Nationale de Médecine Vétérinaire
Debbek, H.
Tunisia, Sidi Thabet
Ecole Nationale de Médecine Vétérinaire
Zhang, L. H.
Australia, Brisbane
The University of Queensland
McManus, Donald Peter
Australia, Brisbane
The University of Queensland
Souissi, A.
Tunisia, Bizerte
Crda
Chelly, S.
Tunisia, Bizerte
Crda
Torgerson, P. R.
Switzerland, Zurich
Universität Zürich
Statistics
Citations: 79
Authors: 7
Affiliations: 4
Identifiers
Doi:
10.1016/j.vetpar.2004.02.016
ISSN:
03044017
Research Areas
Genetics And Genomics
Study Design
Cross Sectional Study
Study Locations
Multi-countries
Tunisia