A study on the bacterial infections of freshwater crayfish (Astacus leptodactylus) in the Aras reservoir
Astacus leptodactylus is an important economical fisheries resource of Aras dam reservoir, in Iran. The infection of freshwater crayfish by gram negative and gram positive bacteria is often observed in natural and cultural environments which are considered as secondary disease agents or opportunities. This study was conducted to investigate infection conditions on 70 crayfish from the Aras reservoir regarding the bacterial agents by culturing from hemolymph in aseptic condition on Blood Agar, Trypton Soya Agar (TSA) and Cytophaga Agar The study was performed by biochemical tests. In this study Aeromonas hydrophila, Staphylococcus aureus, Micrococcus luteus and Flavobacterium johnsonaewere isolated and determined. According to the results of this study which was performed for first time on Aras reservoir freshwater crayfish, the percentage of crayfish which carried bacteria in hemolymph were variable ( 20-58.5%). Also, the gram negative bacteria particularly Aeromonas hydrophyla were dominant among the bacteria isolated from studied crayfishes.
| Main Authors: | , , , , , , , , , , |
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| Format: | Report biblioteca |
| Language: | Persian |
| Published: |
Iranian Fisheries Science Research Institute
2016
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| Subjects: | Freshwater, Crayfish, Bacterial infection, Aeromonas hydrophila, Staphylococcus aureus, Micrococcus luteus, Flavobacterium johnsonae, |
| Online Access: | http://hdl.handle.net/1834/13951 |
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| Summary: | Astacus leptodactylus is an important economical fisheries resource of Aras dam reservoir, in Iran. The infection
of freshwater crayfish by gram negative and gram positive bacteria is often observed in natural and cultural
environments which are considered as secondary disease agents or opportunities. This study was conducted to
investigate infection conditions on 70 crayfish from the Aras reservoir regarding the bacterial agents by culturing
from hemolymph in aseptic condition on Blood Agar, Trypton Soya Agar (TSA) and Cytophaga Agar The study
was performed by biochemical tests. In this study Aeromonas hydrophila, Staphylococcus aureus, Micrococcus
luteus and Flavobacterium johnsonaewere isolated and determined. According to the results of this study which
was performed for first time on Aras reservoir freshwater crayfish, the percentage of crayfish which carried
bacteria in hemolymph were variable ( 20-58.5%). Also, the gram negative bacteria particularly Aeromonas
hydrophyla were dominant among the bacteria isolated from studied crayfishes. |
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