Fachbereich Veterinärmedizin



    Prevalence and molecular characteristics of Vibrio spp. isolated from preharvest shrimp of the North Western Province of Sri Lanka (2012)

    Zeitschriftenartikel / wissenschaftlicher Beitrag
    Koralage, Madura Sanjeevani Gonsal
    Alter, Thomas (WE 8)
    Pichpol, Duangporn
    Strauch, Eckhard
    Zessin, Karl-Hans
    Huehn, Stephan (WE 8)
    Charakterisierung der Vibrio spp.-Population in Lebensmitteln (C-4); globale Aspekte von Vibrio spp. (C-1); Transkriptom-Profiling von pathogenen Vibrio spp. mittels Microarray-Technik (C6b) im Verbundprojekt VibrioNet
    Journal of Food Protection; 75(10) — S. 1846–1850
    ISSN: 0362-028x
    DOI: 10.4315/0362-028X.JFP-12-115
    Pubmed: 23043835
    Institut für Lebensmittelsicherheit und -hygiene

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    Abstract / Zusammenfassung

    This study investigated the prevalence and molecular characteristics of Vibrio spp. in farmed shrimp (Penaeus monodon) in Sri Lanka. A total of 170 shrimp samples (100 g of whole shrimp each) taken from individual ponds from 54 farms were collected 1 week prior to harvest from the North Western Province of Sri Lanka. Overall, 98.1% of the farms and 95.1% of the ponds were positive for Vibrio spp. in shrimp; at the pond level, V. parahaemolyticus (91.2%) was most common, followed by V. alginolyticus (18.8%), V. cholerae non-O1/non-O139 (4.1%), and V. vulnificus (2.4%). Multiple Vibrio spp. were detected in 20.6% of the ponds. None of the V. parahaemolyticus isolates (n = 419) were positive for the virulence-associated tdh (thermostable direct hemolysin) and trh (TDH-related hemolysin) genes. V. cholerae was confirmed by the presence of ompW, and all isolates (n = 8) were negative for the cholera toxin (ctxA) gene. V. cholerae isolates were serogrouped by PCR and identified as V. cholerae non-O1/non-O139. All four V. vulnificus strains, isolated from different ponds of two geographical regions, showed pathogenic potential; they belonged to vcgC sequence type, type B 16S rRNA genotype and contained a pilF polymorphism associated with human pathogenicity. The results of this study revealed the ubiquitous nature of vibrios in farmed shrimp. To minimize the potential risk of Vibrio infections due to handling or consumption of raw or undercooked seafood products, good manufacturing practices as well as proper handling and processing should be addressed.