Francisella noatunensissubsp.orientalis, an emerging bacterial pathogen affecting cultured red tilapia (Oreochromissp.) in Thailand

Nguyen, Vuong Viet; Dong, Ha Thanh; Senapin, Saengchan; Pirarat, Nopadon; Rodkhum, Channarong

doi:10.1111/are.12802

Cited by 58 publications

(62 citation statements)

References 24 publications

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“…Essa bactéria é estritamente aeróbia e apresenta crescimento intracelular facultativa. Esta bacteriose é emergente na aquicultura mundial, podendo causar perdas em ambientes marinhos e dulcícolas (Vestvik et al, 2013;Nguyen et al, 2015). Recentemente foram identificados dois agentes etiológicos Francisella noatunensis subspécie orientalis e F. noatunensis subspécie noatunensis que são responsáveis pela bacteriose em águas tropicais e temperadas, respectivamente (Soto et al, 2009;Duodu et al, 2012;Vestvik et al, 2013;Nguyen et al, 2015).…”

Section: Introductionunclassified

“…Nas duas últimas décadas, países como Japão, Tailândia, Taiwan, indonésia, Noruega, Suécia, Reino Unido, Estados Unidos, Costa Rica, Chile e Brasil já registraram surtos dessa bactéria (Nguyen et al, 2015). No Brasil, Leal et al (2014) registraram o primeiro surto de franciselose em alevinos e juvenis de tilápias do Nilo (Oreochromis niloticus) durante os invernos dos anos de 2012 e 2013, no estado de Minas Gerais (sudeste brasileiro).…”

Section: Introductionunclassified

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PRIMEIRO RELATO DE Francisella noatunensis SUBESPÉCIE ORIENTALIS NO SUL DO BRASIL – RELATO DE CASO

Jatobá¹,

Klipp²,

Hoppe³

2016

Acta Vet Bras

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RESUMOABSTRACT -The systemic visceral granuloma or franciselose is caused by Francisella noatunensis subspecies orientalis and F. noatunensis subspecies noatunensis. In Brazil, the first Francisella outbreak of Nile tilapia (Oreochromis niloticus) was recorded in the winters of 2012 and 2013 in the state of Minas Gerais. However, nothing was observed in the other producing regions. The aim of this study was to diagnose the causative agent of mortality Nile tilapia (Oreochromis niloticus) in a production unit in the state of Santa Catarina. For a mortality outbreak in September 2015, we were evaluated 35 Tilapia for the presence of parasites, microbiological evaluation and analysis of the polymerase chain reaction. After analysis, it was registered the presence of F. noatunensis subspecies orientalis, the first reported in southern Brazil

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Section: Introductionunclassified

PRIMEIRO RELATO DE Francisella noatunensis SUBESPÉCIE ORIENTALIS NO SUL DO BRASIL – RELATO DE CASO

Jatobá¹,

Klipp²,

Hoppe³

2016

Acta Vet Bras

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“…Previous work has shown that for tilapia mortality rates can be 100% in less than 48 to 72 h (Soto et al 2009a), 86.7 ± 23% in 5 d p.i. (Nguyen et al 2016), or 90% between 20 h and 8 d (Leal et al 2014). In our study, mortality did not correlate with the infection dose.…”

Section: Discussionmentioning

confidence: 99%

Susceptibility of common carp and sunfish to a strain of Francisella noatunensis subsp. orientalis in a challenge experiment

Lewisch

Menanteau–Ledouble²,

Tichy³

et al. 2016

Dis. Aquat. Org.

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Francisellosis, an emerging disease in many fish species, can cause high mortality in affected populations. Here we investigated the susceptibility of common carp Cyprinus carpio and sunfish Lepomis gibbosus to Francisella noatunensis subsp. orientalis (Fno), and possible transmission of the bacteria between the 2 fish species. In a challenge experiment, 3 groups of each species were injected intraperitoneally (IP) with 3 different doses of an Fno strain no. 9449 of the Norwegian Veterinary Institute, recovered from naturally infected ornamental Malawi cichlids. Infected carp were cohabitated with sunfish and vice versa. Control groups were injected with 0.9M phosphate-buffered saline and cohabitated accordingly. Fish were sampled at different time points. Mortality of challenged sunfish was observed during the first 96 h and reached 56.1%. In the control sunfish, 4 of 16 fish (25%) died within 48 h. In carp, no mortalities or clinical signs were observed during the experiment. General clinical and patho-anatomical disease signs of affected sunfish were observed. We detected granulomas in 2 cohabitated sunfish and 1 challenged carp, but could not re-isolate Fno from these fish. Fno was successfully cultured from 6 sunfish and 3 carp specimens until 35 d post injection. PCR of spleen and kidney with 16S rDNA Francisella-like bacterium primers 180f and 485r yielded amplicons in 68.3% of challenged sunfish and only 12.2% of challenged carp. We demonstrated that sunfish were susceptible to Fno infection while the carp were not. Horizontal transmission of the agent between the 2 fish species could not be demonstrated. KEY WORDS: Bacteria · Francisellosis · Cyprinus carpio · Lepomis gibbosus · TransmissionResale or republication not permitted without written consent of the publisher

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“…orientalis VMCU-FNO131 (referred to as Fno) previously isolated from diseased tilapia in Thailand (Nguyen et al, 2015) was used for the challenge test in this study. Fno was recovered from preservative vial stock (-80 °C) using cysteine heart agar supplemented with 10% sheep blood (CHAB).…”

Section: Francisella Isolate and Culture Conditionmentioning

confidence: 99%

“…Typical histopathological lesions for piscine francisellosis are characterized by multiple visceral granulomas, noticeably in the spleen and kidney, but also found in the liver, gut and gills (Nguyen et al, 2015;Olsen et al, 2006;Soto et al, 2009). Most recently, the emergence of francisellosis caused by Fno in farmed tilapia has been reported in Thailand and China (Lin et al, 2015;Nguyen et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Francisella noatunensis subsp. orientalis infects striped catfish (Pangasianodon hypophthalmus) and common carp (Cyprinus carpio) but does not kill the hosts

et al. 2016

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Francisella noatunensissubsp.orientalis, an emerging bacterial pathogen affecting cultured red tilapia (Oreochromissp.) in Thailand

Cited by 58 publications

References 24 publications

PRIMEIRO RELATO DE Francisella noatunensis SUBESPÉCIE ORIENTALIS NO SUL DO BRASIL – RELATO DE CASO

PRIMEIRO RELATO DE Francisella noatunensis SUBESPÉCIE ORIENTALIS NO SUL DO BRASIL – RELATO DE CASO

Susceptibility of common carp and sunfish to a strain of Francisella noatunensis subsp. orientalis in a challenge experiment

Francisella noatunensis subsp. orientalis infects striped catfish (Pangasianodon hypophthalmus) and common carp (Cyprinus carpio) but does not kill the hosts

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