Publikationsdatum:
2021-05-19
Beschreibung:
Streptococcosis is an infectious bacterial disease that causes huge economic losses in cold water aquaculture industry. Disease outbreak was experienced in some of provinces farms in recent years. Fars Province, has produced 7,000 tons of cold-water fish. According to Streptococcosis report in 1381 from the province and Proceedings have been performed during 10 years against disease and also economic losses impact of disease on rainbow trout production, risk assessment of Streptococcosis conducted on the plan. In this study, of 586 sick fish (have symptoms) studied 230 fish (39.24%) Streptococcus and (26.62%) gram negative bacteria were isolated. Of 754 healthy grower fish and fry (with no clinical signs) 10 fish or fry (1.32%)infected with streptococcus and 60 fish or fry(7.95%) infected with gram negative bacteria (Yersinia ruckeri , Pseudomonas , entrobacteriaceae).According to biochemical tests and molecular examinations , isolated Streptococcus identified as Lactococcus garvieae , Streptococcus iniae and Streptococcus sp. Furthermore some physical and chemical parameters measured and aerobic bacteria of selected farm water counted. These factors effects on disease incidence and changes were evaluated by applying logistic regression.
Beschreibung:
Iranian Fisheries Science Research Institute
Beschreibung:
Published
Schlagwort(e):
Aquaculture
;
Streptococcosis
;
Risk factors
;
Rainbow trout
;
Survey
;
Diseases
;
Fry
;
Clinical signs
;
Bacteria
;
Yersinia ruckeri
;
Pseudomonas
;
Entrobacteriaceae
Repository-Name:
AquaDocs
Materialart:
Report
,
Refereed
Format:
58pp.
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