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dc.contributor.authorPadmaja Jayaprasad Pradeepen_US
dc.contributor.authorRungkarn Suebsingen_US
dc.contributor.authorSarawut Sirithammajaken_US
dc.contributor.authorJantana Kampeeraen_US
dc.contributor.authorWarren Turneren_US
dc.contributor.authorAndrew Jeffsen_US
dc.contributor.authorWansika Kiatpathomchaien_US
dc.contributor.authorBoonsirm Withyachumanarnkulen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherThailand National Center for Genetic Engineering and Biotechnologyen_US
dc.contributor.otherNam Sai Farmsen_US
dc.contributor.otherUniversity of Aucklanden_US
dc.contributor.otherPrince of Songkla Universityen_US
dc.identifier.citationAquaculture Research. Vol.48, No.6 (2017), 2706-2717en_US
dc.description.abstract© 2016 John Wiley & Sons Ltd Horizontal transmission of various bacterial pathogens in tilapia is well described, but there is scant information regarding their vertical transmission. This study aimed to determine the possibility of vertical transmission of two commonly reported bacterial pathogens (Francisella noatunensis subsp. orientalis and Shewanella putrefaciens) in natural stocks of red tilapia (Oreochromis spp.). Vertical transmission of these pathogens via gametes was evaluated using in vitro fertilization from 10 different families and analysing for the presence of bacteria in milt, unfertilized eggs, fertilized eggs and offspring at various ages (1-day-old larvae, 10-day-old fry and 30-day-old fingerlings), as well as water samples using colorimetric LAMP assay. The study revealed that both F. n. orientalis (6/10) and S. putrefaciens (4/10) was transmitted vertically to the fertilized eggs. Analysis of the water samples from different water sources (brood stock tanks, hatching chamber and larval rearing tanks) showed that both the pathogens were present in water samples with highest prevalence for F. n. orientalis followed by S. putrefaciens. Analyses for the presence of two pathogens in various organs (gonads, gill, liver, spleen, kidney and brain) of the healthy tilapia broodstock without any clinical symptoms of disease demonstrated they were carriers of S. putrefaciens and F. n. orientalis. This is the first documented evidence that vertical transmission via the broodstock of tilapia may also play an important role in transmitting these problematic pathogens to their progeny and underlines the necessity to modify the current disease management strategies in tilapia aquaculture.en_US
dc.rightsMahidol Universityen_US
dc.subjectAgricultural and Biological Sciencesen_US
dc.titleVertical transmission and concurrent infection of multiple bacterial pathogens in naturally infected red tilapia (Oreochromis spp.)en_US
Appears in Collections:Scopus 2016-2017

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