SOME VARIETIES OF PATHOLOGICAL CHANGES IN EXPERIMENTAL INFECTION OF CARPS (Cyprinus carpio) WITH Aeromonas hydrophila

Year 2015, Volume: 1 Issue: 4, 191 - 202, 24.07.2015

Deyan Stratev , Stoycho Stoev Ivan Vashin Hristo Daskalov

https://doi.org/10.3153/JAEFR15019

Abstract

The main clinical
and pathomorphological changes in Aeromonas hydrophila infection in carp
provoked by different field strains of this bacterium were studied. The strongest histopathological damages
were seen in the functional epithelium of liver and kidneys, fol­lowed by
intestine and hearth damages in addition to various haemorrhages in
interstitial tissues of visceral organs and some skin haemorrhages on the ventral sur­face of the body and the anal
region. As a whole,
pathological damages consisted of degenerative changes as cloudy swelling,
granular and/or hyaline droplet degeneration or
vacuolation in functional epi­thelium
in the respective internal organs in addition to some target vascular disturbances,
which appeared to be good biomarkers for field assessment of that dis­ease.
Pathological damages in internal organs and haemorrhages were stronger in
experimental fishes exposed to higher levels of
the respective pathogens, especially those isolated from dead anaconda or the
referent strain, and less pronounced damages were seen in fishes
infected with of Aeromonas hydrophila isolated from a
silver carp with marked signs of septi­caemia.

Keywords

Carp, Infection, Pathology, Pathomorpho¬logical changes, Aeromonas hydrophila

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