Pathogenicity and antibiotic susceptibility of two bacterial pathogens associated with the clam Tapes decussatus in some Egyptian fisheries
Abstract
Bivalve aquaculture is generally influenced by bacterial pathogens that cause high mortality-related losses in hatcheries. Six bacterial phenotypes had been previously isolated as the most predominant microorganisms in carpet shell clam (Tapes decussates) samples collected from natural beds in representative Egyptian clam fisheries. The main aims of this study were to investigate the nature of the pathogenic strains that significantly affect clam survival and test their susceptibility to commercially available antibiotics. Based on their 16S rRNA sequences and some biochemical features, two potent clam pathogens were emerged; one of which is gram-positive and the other is gram-negative. The former isolate was identified as Micrococcus luteus and the latter as Vibrio alginolyticus. Experimental challenges with the two bacterial pathogens introduced at different initial cell concentrations (2.5 X 104 - 7.5 X 104 cfu ml-1) showed markedly diverse clam mortality results. However, the pathogenic interaction of M. luteus with clam survival was generally higher than that of V. alginolyticus. When introduced at a relatively low initial cell density, the infectious records of V. alginolyticus were significantly increased suggesting that the expression of its key virulence factors is mainly triggered as a response to host contact. Antibiotic susceptibility tests suggested chloramphenicol and tetracycline as markedly effective agents that can be used to control the spread of these two bacterial pathogens in aquaculture applications.
Keywords
Kaynakça
- Abdella, B., El-Wazzan E., El-Sersy, N.A., El-Helow, E.R. & Sabry, S.A, (2015). Dynamics of bacterial pathogens associated with the clam Tapes decussatus in three main Egyptian fisheries. Journal of Advances in Biology, 8(2):1614-1622.
- Altuntas, F., Yildiz, O., Eser, B., Gündogan, K., Sumerkan, B. & Çetin, M. (2004). Catheter-related bacteremia due to Kocuria rosea in a patient undergoing peripheral blood stem cell transplantation. BioMedical Central Infectious, 4(1):62. doi: 10.1186/1471-2334-4-62
- Arapov, J., Ezgeta-Balić, D., Peharda, M. & Ninčević Gladan, Ž. (2010). Bivalve feeding- how and what they eat? Croatian Journal of Fisheries, 68(3):105-116.
- Aydin, S., Ciltas, A., Yetim, H. & Akyurt, I. (2005). Clinical, pathological and haematological effects of Micrococcus luteus infections in Rainbow Trout (Oncorhynchus mykiss Walbaum). Journal of Animal and Veterinary Advances, 4(2):167-174.
- Carvalho, E.D., David, G.S. & Silva, R.J. (Eds.). (2012). Health and Environment in Aquaculture. Rijeka, Croatia: InTech. doi: 10.5772/2462
- Castillo, D., D’Alvise, P., Kalatzis, P. G., Kokkari, C., Middelboe, M., Gram, L., Liu, S. & Katharios, P. (2015). Draft genome sequences of Vibrio alginolyticus strains V1 and V2, opportunistic marine pathogens. Genome Announcements. 3(4):e00729–15. doi: 10.1128/genomeA.00729-15
- Chatterjee, S. & Haldar, S. (2012). Vibrio related diseases in aquaculture and development of rapid and accurate identification methods. Journal of Marine Science: Research & Development, 1(2):1-7. doi: 10.4172/2155-9910.S1-002
- Chen, Y., Dai, J., Morris, J.G. Jr. & Johnson, J.A., (2010). Genetic analysis of the capsule polysaccharide (K antigen) and exopolysaccharide genes in pandemic Vibrio parahaemolyticus O3:K6. BMC Microbiology 10:274. doi: 10.1186/1471-2180-10-274
Ayrıntılar
Birincil Dil
İngilizce
Konular
-
Bölüm
Araştırma Makalesi
Yazarlar
Bahaa Abdella
Faculty of Aquatic and Fisheries Sciences
0000-0001-5237-263X
Egypt
Eman El-wazzan
*
National Institute of Oceanography and Fisheries
0000-0001-8615-5588
Egypt
Nermeen El-sersy
National Institute of Oceanography and Fisheries
0000-0001-8724-0303
Egypt
Soraya Sabry
Department of Botany and Microbiology, Faculty of Science, Alexandria University
0000-0001-7428-4665
Egypt
Ehab El-helow
*
Department of Botany and Microbiology, Faculty of Science, Alexandria University
0000-0002-4319-3856
Egypt
Yayımlanma Tarihi
15 Aralık 2017
Gönderilme Tarihi
30 Haziran 2017
Kabul Tarihi
14 Eylül 2017
Yayımlandığı Sayı
Yıl 2017 Cilt: 34 Sayı: 4
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