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Virulence potential and antibiotic susceptibility pattern of motile aeromonads associated with freshwater ornamental fish culture systems: a possible threat to public health
Sreedharan, Krishnan; Philip, Rosamma; Singh, Isaac Sarojani Bright.
  • Sreedharan, Krishnan; Cochin University of Science and Technology. National Centre for Aquatic Animal Health. Kerala. IN
  • Philip, Rosamma; Cochin University of Science and Technology. School of Marine Sciences. Department of Marine Biology, Microbiology and Biochemistry. Kerala. IN
  • Singh, Isaac Sarojani Bright; Cochin University of Science and Technology. National Centre for Aquatic Animal Health. Kerala. IN
Braz. j. microbiol ; 43(2): 754-765, Apr.-June 2012. ilus, tab
Article Dans Anglais | LILACS | ID: lil-644493
ABSTRACT
Aeromonas spp. are ubiquitous aquatic organisms, associated with multitude of diseases in several species of animals, including fishes and humans. In the present study, water samples from two ornamental fish culture systems were analyzed for the presence of Aeromonas. Nutrient agar was used for Aeromonas isolation, and colonies (60 No) were identified through biochemical characterization. Seven clusters could be generated based on phenotypic characters, analyzed by the programme NTSYSpc, Version 2.02i, and identified as Aeromonas caviae (33.3%), A. jandaei (38.3%) and A. veronii biovar sobria (28.3%). The strains isolated produced highly active hydrolytic enzymes, haemolytic activity and slime formation in varying proportions. The isolates were also tested for the enterotoxin genes (act, alt and ast), haemolytic toxins (hlyA and aerA), involved in type 3 secretion system (TTSS ascV, aexT, aopP, aopO, ascF-ascG, and aopH), and glycerophospholipid-cholesterol acyltransferase (gcat). All isolates were found to be associated with at least one virulent gene. Moreover, they were resistant to frequently used antibiotics for human infections. The study demonstrates the pathogenic potential of Aeromonas, associated with ornamental fish culture systems suggesting the emerging threat to public health.
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Texte intégral: Disponible Indice: LILAS (Amériques) Sujet Principal: Microbiologie de l'eau / Techniques in vitro / Résistance microbienne aux médicaments / Acyltransferases / Faune Aquatique / Réaction de polymérisation en chaîne / Infections bactériennes à Gram négatif / Aeromonas / Prédisposition aux maladies / Entérotoxines Type d'étude: Facteurs de risque Limites du sujet: Animaux / Humains langue: Anglais Texte intégral: Braz. j. microbiol Thème du journal: Microbiologie Année: 2012 Type: Article / descriptif de projet Pays d'affiliation: Inde Institution/Pays d'affiliation: Cochin University of Science and Technology/IN

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Texte intégral: Disponible Indice: LILAS (Amériques) Sujet Principal: Microbiologie de l'eau / Techniques in vitro / Résistance microbienne aux médicaments / Acyltransferases / Faune Aquatique / Réaction de polymérisation en chaîne / Infections bactériennes à Gram négatif / Aeromonas / Prédisposition aux maladies / Entérotoxines Type d'étude: Facteurs de risque Limites du sujet: Animaux / Humains langue: Anglais Texte intégral: Braz. j. microbiol Thème du journal: Microbiologie Année: 2012 Type: Article / descriptif de projet Pays d'affiliation: Inde Institution/Pays d'affiliation: Cochin University of Science and Technology/IN