Abd El Tawab, A., Maarouf, A., El Hofy, F., El Mougy, E. (2017). Detection of some virulence genes in A. hydrophila and A. caviae isolated from fresh water fishes at Qalubia Governorate. test, 33(2), 489-503. doi: 10.21608/bvmj.2017.30598
Ashraf A. Abd El Tawab; Ahmed A. A. Maarouf; Fatma I. El Hofy; Emad E. A. El Mougy. "Detection of some virulence genes in A. hydrophila and A. caviae isolated from fresh water fishes at Qalubia Governorate". test, 33, 2, 2017, 489-503. doi: 10.21608/bvmj.2017.30598
Abd El Tawab, A., Maarouf, A., El Hofy, F., El Mougy, E. (2017). 'Detection of some virulence genes in A. hydrophila and A. caviae isolated from fresh water fishes at Qalubia Governorate', test, 33(2), pp. 489-503. doi: 10.21608/bvmj.2017.30598
Abd El Tawab, A., Maarouf, A., El Hofy, F., El Mougy, E. Detection of some virulence genes in A. hydrophila and A. caviae isolated from fresh water fishes at Qalubia Governorate. test, 2017; 33(2): 489-503. doi: 10.21608/bvmj.2017.30598

Detection of some virulence genes in A. hydrophila and A. caviae isolated from fresh water fishes at Qalubia Governorate

Benha Veterinary Medical Journal
Article 49, Volume 33, Issue 2, December 2017, Pages 489-503    PDF (543.88 K)
Document Type: Original Article
DOI: 10.21608/bvmj.2017.30598
Authors
Ashraf A. Abd El Tawab1; Ahmed A. A. Maarouf2; Fatma I. El Hofy1; Emad E. A. El Mougy3
1Bacteriology, Immunology and Mycology Dep., Fac. of Vet. Med., Benha Univ.
2Animal Health Research "Benha branch"
3Veterinary hospital of Fac. Vet. Med. Benha Univ.
Abstract
The study was conducted on 225 diseased fish samples, 125 Nile tilapia (Oreochromis niloticus)
and 100 Catfish(Claris gariepinus) , collected from different fish markets at Qalubia Governorate
during the period from January (2016) to May (2017) for detection of Aeromonas species. The
samples were taken from apparently pathognomonic lesions in muscle, kidney, liver, intestine and
spleen after clinical and postmortem examination for bacteriological examination. The results
revealed that, 125 Aeromonas species were isolated from the examined samples where A.
hydrophila and A. caviae were identified. Accurately 114 (91.2 %) A. hydrophila strains, 63
(50.4%) and 51 (40.8%) were isolated from C. gariepinus and O. niloticus fishes respectively.
Meanwhile, 11(8.8 %) A. caviae strains, 7 (5.6%) and 4 (3.2%) from C. garicpinus and O. niloticus
fishes respectively. Further PCR results for virulence genes in isolated Aeromonas strains indicated
that, aero gene was detected in 9 out of 10 A .hydrophila studied strains and in 3 out of 6 A. caviae ;
hly gene in 7 out of 10 A .hydrophila and in 2 out of 6 A. caviae; Ahcytoen gene in 6 out of 10 A
.hydrophila and in 1 out of 6 A. caviae ; act gene in 6 out of 10 A .hydrophila and in 3 out of 6 A.
caviae and ast gene in 7 out of 10 A .hydrophila and in 3 out of 6 A. caviae studied strains. Finally,
the production of a wide array of virulence factors by isolated strains is indicative of their potential
to cause diseases in fishes and humans.
Keywords
fish; Bacteriological; aeromonas; Virulence genes
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