OCCURRENCE AND PATHOGENICITY OF SERRATIA MARCESCENS AT FISH FARMS IN KAFR EL-SHEIKH GOVERNORATE | ||||
| Kafrelsheikh Veterinary Medical Journal | ||||
| Article 5, Volume 2, Issue 2, October 2004, Page 71-92 PDF (1.05 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/kvmj.2004.112425 | ||||
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| Authors | ||||
| M. S. Gado* 1; Iman A. Abd El-Aziz2 | ||||
| 1Poultry and Fish Dept., Fac. Vet. Med., Tanta Univ. | ||||
| 2Pathology Dept. Fac. Vet. Med., Tanta Univ. | ||||
| Abstract | ||||
| Aninvestigationwascarriedoutfor unusual disease outbreaks occurred on 5 commercial oreochromis niloticus (O.niloticus) fish farms during the peroid 2003 – 2004 , in 3 Districts in Kafr El-Sheikh Governorate. Affected fish exhibited anorexia , sluggishness , variously sized areas of haemorrhage on the skin , corneal opacity and high mortality up to 21.4% . Bacterial isolates from the moribund fish were identified as Serratia marcescens (S.marcescens)by biochemical tests revealed 28 isolates. The virulence properties of this isolates , studied revealed that werehighlypathogenicfor fishwithLD50srangingfrom5x103to 1x105. Moreover , the isolates were pathogenic for mice with LD50 1.6x106. Histopathological alterationsof the naturalandexperimental infections are described . The antibiogramme of the isolated S.marcescens was investigated .This study is considered the first record of S.marcescens infection in O.niloticus fish in Egypt . | ||||
| Keywords | ||||
| Oreochromis niloticus; Serratia marcescens | ||||
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