Publication Date:
2021-07-16
Description:
Streptococcosis is an acute infectious disease that causes mortality in marine and freshwater aquacultures. One of the most important hosts is susceptible to the disease of rainbow trout and during the past decade its industrial production has been growing in Iran. According to FAO, Iran is among the 10 countries producing fish in the world. The most important bacteria causing Strptococcosis includes Strptococcus, Vagococcus and Enterococcus genera. But in all cases, the clinical sings are the same. More than a decade has passed since the first report of this disease in Iran and unfortunately, this disease has become the most important problems of trout production in Iran. Therefor, 72 farms were selected in 8 provinces including Mazandaran, Gilan, Lorestan, CharmahalBakhtiyari, Fars, Kermanshah, Tehran and Kokiloye-Boyer Ahmad and a total 520 moribund and apparently healthy rainbow trout (weight 50 – 200gr) were collected during summer 2008 to 2009. Fish kidney, spleen and liver samples were culture aseptically and finally 206 isolates were identified as gram positive cocci. Using conventional biochemical test, S.uberis, S.agalactiae, S.dysgalactiae, S.faecium and S.inia. Additionally, 172 from 206 isolates were confirmed as S.uberis، S.agalactiae، S.dysgalactiae، S.faecium and S.inia using a PCR assay ased on the results, the most prevalent is belong to S.uberis (isolated from 5 of 7 province), S.dysgalactiae (isolated from 4 of 7 province), S.agalactiae (isolated from 2 of 7 province) and S.faecium and S.inia (from 1 of 7 province) respectively. It is necessary to mention, S.inia was identified just to Fars and any gram positive cocci was isolated from Tehran.
Keywords:
Aquaculture
;
Health
;
Iran
;
Lorestan Province
;
Gilan province
;
Mazandaran Province
;
Charmahal Bakhtiyari province
;
Fars Province
;
Kermanshah province
;
Tehran province
;
Kokiloye-Boyer Ahmad province
Repository Name:
AquaDocs
Type:
monograph
Format:
application/pdf
Format:
application/pdf
Format:
43
