Protective Evaluation of Feed Fortified with Alstonia Boonei and Mitracarpus Scaber in African Catfish Exposed to Aeromonas Hydrophila: Clinicopathology and Immunohistochemistry
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Date
2022-11-25
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Publisher
Central Fisheries Research Institute (SUMAE) Trabzon, Turkey
Abstract
The present study was carried out to determine the protective effects of two dietary
plants and the associated pathology in African catfish exposed to A. hydrophila. Four
hundred and twenty fish with average weight of 20.53±0.15 g were distributed equally
(in triplicates) into seven experimental groups (six treatment groups and a control
group) with 20 juvenile African catfish in each aquarium. Fish were fed for 84 days with
control and six other experimental diets containing different percentages of Alstonia
boonei (0.5%,1.0% and 1.5%) and Mitracarpus scaber (0.5%,1.0% and 1.5%) of the
basal diets. At the end of 12th week, the fish were challenged with A. hydrophila and
clinical signs and mortality rate were observed for fourteen days, post challenge. Blood
and tissue samples were collected for analysis. All the groups fed with plant
supplemented feed had 100% survival rate except A. boonei (0.5%) with 85% and
control had 70% survival rate. The dietary plants also improved the haematological
parameters and reduced the histopathological lesions associated with A. hydrophila
exposure, compared to the control. These findings have demonstrated the protective
potentials of A. boonei and M. scaber inculcated in feed against A. hydrophila infection
in African catfish.
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Keywords
Dietary plants Protection Infection Histopathology Immunopathology