Experimental infection of tigerfish (Hydrocynus vittatus) and African sharp tooth catfish (Clarias gariepinus) with Trichinella zimbabwensis
| Autor: | Samson Mukaratirwa, Louis J. La Grange |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Male
Clarias gariepinus 040301 veterinary sciences Trichinella trichinella zimbabwensis 030231 tropical medicine hydrocynus vittatus Zoology Varanus niloticus 0403 veterinary science Fish Diseases Research Communication 03 medical and health sciences 0302 clinical medicine Hydrocynus vittatus parasitic diseases Animals Helminths tiger fish Catfishes Larva lcsh:Veterinary medicine General Veterinary biology infectivity Trichinellosis Aquatic animal clarias gariepinus 04 agricultural and veterinary sciences General Medicine biology.organism_classification Crocodylus lcsh:SF600-1100 Female Characiformes Catfish |
| Zdroj: | Onderstepoort Journal of Veterinary Research, Vol 87, Iss 1, Pp e1-e5 (2020) The Onderstepoort Journal of Veterinary Research |
| ISSN: | 2219-0635 0030-2465 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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