Mortalities in red claw crayfish Cherax quadncannatus associated with systemic Vibrio mimicus infection

Eaves, L. E.; Ketterer, P. J.

doi:10.3354/dao019233

Cited by 40 publications

(26 citation statements)

References 7 publications

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“…Some species of bacteria are known to be pathogens of stressed freshwater crayfish. For example, Vibrio mimicus has been associated with mortality in highly stressed freshwater crayfish in USA (THUNE et al, 1991) and Australia (EAVES and KETTERER, 1994). Based on published data, there is no reported exotic Gram negative or Gram-positive bacterium which obviously represents a serious threat to European freshwater crayfish.…”

Section: Bacteriamentioning

confidence: 99%

Hazard Analysis of Exotic Pathogens of Potential Threat to European Freshwater Crayfish.

Edgerton

2002

Bull. Fr. Pêche Piscic.

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Managers, scientists, fishermen and farmers who work with freshwater crayfish understand clearly the severe affects that the introduction of an exotic pathogen can have on freshwater crayfish populations. This acute awareness is due to the severe impact on native European freshwater crayfish of the introduction of crayfish plague fungus Aphanomyces astaci. This issue has been thoroughly covered in previous reviews. The potential impact of other pathogens on European freshwater crayfish has not been addressed. This paper presents a hazard analysis of pathogens of freshwater crayfish exotic to Europe, which is the first step of import risk analysis.

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Section: Bacteriamentioning

confidence: 99%

Hazard Analysis of Exotic Pathogens of Potential Threat to European Freshwater Crayfish.

Edgerton

2002

Bull. Fr. Pêche Piscic.

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“…Mass mortalities in pond-reared redclaw have so far been caused by bacterial diseases including vibriosis (Eaves & Ketterer 1994) and those due to infections with rickettsiales-like organisms (Ketterer et al 1992).…”

Section: Resale or Republication Not Permitted Without Written Consenmentioning

confidence: 99%

“…Sub-clinical viral infections have been reported (Edgerton et al 1994, Edgerton & Owens 1999, but crayfish with these infections have usually been coinfected with bacterial and/or other pathogens. Mass mortalities in pond-reared redclaw have so far been caused by bacterial diseases including vibriosis (Eaves & Ketterer 1994) and those due to infections with rickettsiales-like organisms (Ketterer et al 1992).…”

Section: Several Viruses Have Been Described From Farmedmentioning

confidence: 99%

A parvo-like virus in cultured redclaw crayfish Cherax quadricarinatus from Queensland, Australia

Bowater¹,

Wingfield²,

Fisk³

et al. 2002

Dis. Aquat. Org.

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In the summer of 1999/2000, an epizootic occurred in cultured juvenile redclaw crayfish Cherax quadricarinatus on one commercial crayfish farm in northern Queensland, Australia. Mortalities occurred over 4 wk, with up to 96% cumulative mortalities in 2 earthen ponds stocked with juveniles. The crayfish were weak, anorexic and lethargic. A transmission trial was conducted, using filtered, cell-free extract prepared from infected crayfish as inoculum. The disease was reproduced, with on-going mortalities occurring in inoculated crayfish over 55 d. Experimentally inoculated crayfish showed gross signs of malaise, anorexia and disorientation before dying. Two types of intranuclear inclusion bodies (INIBs) were seen in tissues of endodermal, ectodermal and mesodermal origin by light microscopy with haematoxylin and eosin (H&E) stained sections. 'Early'-stage INIBs were eosinophilic, rounded and located centrally within slightly enlarged nuclei while 'late'-stage INIBs were well-rounded and deeply basophilic. The gills, cuticular epithelium and epithelial cells of the foregut, midgut and hindgut were the most heavily infected tissues. By transmission electron microscopy, virions with an average diameter of 19.5 nm were seen within electron-dense granular inclusion bodies within enlarged nuclei of both naturally and experimentally infected crayfish. The size of the virions and cytopathology are consistent with characteristics of viruses in the Family Parvoviridae. This is the first reported case of mass mortality caused by a parvo-like virus infection in C. quadricarinatus. KEY WORDS:Cherax quadricarinatus · Virus · Parvo-like virus · Disease · Aquaculture · Crayfish · Pathology Resale or republication not permitted without written consent of the publisherDis Aquat Org 50: [79][80][81][82][83][84][85][86] 2002 clinical viral infections have been reported (Edgerton et al. 1994, Edgerton & Owens 1999, but crayfish with these infections have usually been coinfected with bacterial and/or other pathogens. Mass mortalities in pond-reared redclaw have so far been caused by bacterial diseases including vibriosis (Eaves & Ketterer 1994) and those due to infections with rickettsiales-like organisms (Ketterer et al. 1992).In December 1999 and January 2000, 1 redclaw crayfish farm in Queensland, Australia, reported higher than average mortalities in 2 earthen ponds stocked with juvenile crayfish Cherax quadricarinatus. Cumulative mortalities of up to 96% occurred over 2 mo. Histopathological examination of diseased crayfish revealed intra-nuclear inclusion bodies that resembled those associated with parvo-like viral infections. In February 2000, on-going mortalities occurred in other ponds on this farm stocked with adult crayfish. There was an estimated 50% loss in total farm production, due to losses of juvenile and adult crayfish and the farm subsequently closed down for a total destocking and pond disinfection. A detailed disease investigation was carried out to determine the cause of the mortalities.The results an...

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“…A number of viruses (Anderson & Prior 1992, Edgerton et al 1994, 1995 'Corresponding author. E-mail: leigh.owens@jcu.edu.au Owens & McElnea 2000), bacteria (Ketterer et al 1992, Owens et al 1992, Eaves & Ketterer 1994, Webster 1995 and ectoparasites (Herbert 1987(Herbert , 1988 have been reported in Australia, and the presence of Cherax bacilliform virus (Groff et al 1993) and rickettsiae (Jimenez & Romero 1997) also been reported outside Australia.…”

Section: Introductionmentioning

confidence: 99%

Infectivity, transmission and 16S rRNA sequencing of a rickettsia, Coxiella cheraxi sp. nov., from the freshwater crayfish Cherax quadricarinatus

Tan

Owens²

2000

Dis. Aquat. Org.

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Mortalities in red claw crayfish Cherax quadncannatus associated with systemic Vibrio mimicus infection

Cited by 40 publications

References 7 publications

Hazard Analysis of Exotic Pathogens of Potential Threat to European Freshwater Crayfish.

Hazard Analysis of Exotic Pathogens of Potential Threat to European Freshwater Crayfish.

A parvo-like virus in cultured redclaw crayfish Cherax quadricarinatus from Queensland, Australia

Infectivity, transmission and 16S rRNA sequencing of a rickettsia, Coxiella cheraxi sp. nov., from the freshwater crayfish Cherax quadricarinatus

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