Experimental infection of tigerfish (Hydrocynus vittatus) and African sharp tooth catfish (Clarias gariepinus) with Trichinella zimbabwensis

Onderstepoort Journal of Veterinary Research

Field Value
Title Experimental infection of tigerfish (Hydrocynus vittatus) and African sharp tooth catfish (Clarias gariepinus) with Trichinella zimbabwensis
Creator la Grange, Louis J. Mukaratirwa, Samson
Subject Wildlife Parasitology; Public Health; Life Cycles Clarias gariepinus; Hydrocynus vittatus; tiger fish; infectivity; Trichinella zimbabwensis
Description Trichinella zimbabwensis naturally infects a variety of reptilian and wild mammalian hosts in South Africa. Attempts have been made to experimentally infect piranha fish with T. zimbabwensis and T. papuae without success. Tigerfish (Hydrocynus vittatus) and African sharp tooth catfish (Clarias gariepinus) are accomplished predators cohabiting with Nile crocodiles (Crocodylus niloticus) and Nile monitor lizards (Varanus niloticus) in southern Africa and are natural hosts of T. zimbabwensis. To assess the infectivity of T. zimbabwensis to these two hosts, 24 African sharp tooth catfish (mean live weight 581.75 ± 249.71 g) randomly divided into 5 groups were experimentally infected with 1.0 ± 0.34 T. zimbabwensis larvae per gram (lpg) of fish. Forty-one tigerfish (mean live weight 298.6 ± 99.3 g) were randomly divided for three separate trials. An additional 7 tigerfish were assessed for the presence of natural infection as controls. Results showed no adult worms or larvae of T. zimbabwensis in the gastrointestinal tract and body cavities of catfish sacrificed at day 1, 2 and 7 post-infection (p.i.). Two tigerfish from one experimental group yielded 0.1 lpg and 0.02 lpg of muscle tissue at day 26 p.i. and 28 p.i., respectively. No adult worms or larvae were detected in the fish from the remaining groups sacrificed at day 7, 21, 28, 33 and 35 p.i. and from the control group. Results from this study suggest that tigerfish could sustain T. zimbabwensis under specific yet unknown circumstances.
Publisher AOSIS
Contributor University of KwaZulu-Natal (South Africa) Department of Agriculture, Rural Development (South Africa)
Date 2020-11-05
Type info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion — Experimental
Format text/html application/epub+zip text/xml application/pdf
Identifier 10.4102/ojvr.v87i1.1876
Source Onderstepoort Journal of Veterinary Research; Vol 87, No 1 (2020); 5 pages 2219-0635 0030-2465
Language eng
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https://ojvr.org/index.php/ojvr/article/view/1876/2143 https://ojvr.org/index.php/ojvr/article/view/1876/2142 https://ojvr.org/index.php/ojvr/article/view/1876/2144 https://ojvr.org/index.php/ojvr/article/view/1876/2141
Coverage Southern Africa N/A N/A
Rights Copyright (c) 2020 Louis J. la Grange, Samson Mukaratirwa https://creativecommons.org/licenses/by/4.0