Protozoan Parasites of the Cane Toad, Bufo-Marinus, in Australia

Delvinquier, B. L. J.; Freeland, W. J.

doi:10.1071/zo9880301

Cited by 26 publications

(24 citation statements)

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“…and Rhabdias spherocephala have been identified as causing pathological changes in B. marinus or diseases in other amphibians, fish or mammals (Hird et al 1981, Speare 1990, Hau et al 1992, Subasinghe 1992, Twiddy & Reilly 1994, Prasad & Rao 1995. Infectious agents which have been identified in/with B. marinus within Australia include species of protozoa, helminths and fungi (Delvinquier 1986, Delvinquier & Freeland 1988a, b, Speare 1990, Speare et al 1994. A notable pathogen is Mucor amphibiorum .…”

Section: Antibody Capture Elisamentioning

confidence: 99%

Giant toads Bufo marinus in Australia and Venezuela have antibodies against 'ranaviruses'

Županović¹,

Lopez²,

Hyatt³

et al. 1998

Dis. Aquat. Org.

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A serological survey was conducted for antibodies against 'ranavlruses' in the giant toad Bufo marinus in Australia and Venezuela. Sera contaming antibodies against 'ranaviruses' were found in both countries. In Australia positive antibodies were identified in populations throughout most of the known range of B. rnarinus. Results were confirmed by immunofluorescence and immunoelectron microscopy where a characteristic stalning pattern of 'ranaviruses' in infected cells was observed. Whilst a 'ranavirus(es)' has been isolated from populations of B. rnarinus in Venezuela, no virus has been isolated from Australian B. marinus populations. The significance of 'ranavirus' sero-positive B. marinus in Australia is discussed. KEY WORDS. Giant toads .

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Section: Antibody Capture Elisamentioning

confidence: 99%

Giant toads Bufo marinus in Australia and Venezuela have antibodies against 'ranaviruses'

Županović¹,

Lopez²,

Hyatt³

et al. 1998

Dis. Aquat. Org.

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“…Conversely, in the process of introduction, a species may transport a subset of its native parasites to the new range (Delvinquier & Freeland 1988;Torchin et al 2003) and become infected by local parasite faunas in their new range (Font & Tate 1994;Torchin et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Prevalence and evolutionary relationships of haematozoan parasites in native versus introduced populations of common mynaAcridotheres tristis

et al. 2005

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The success of introduced species is frequently explained by their escape from natural enemies in the introduced region. We tested the enemy release hypothesis with respect to two well studied blood parasite genera (Plasmodium and Haemoproteus) in native and six introduced populations of the common myna Acridotheres tristis. Not all comparisons of introduced populations to the native population were consistent with expectations of the enemy release hypothesis. Native populations show greater overall parasite prevalence than introduced populations, but the lower prevalence in introduced populations is driven by low prevalence in two populations on oceanic islands (Fiji and Hawaii). When these are excluded, prevalence does not differ significantly. We found a similar number of parasite lineages in native populations compared to all introduced populations. Although there is some evidence that common mynas may have carried parasite lineages from native to introduced locations, and also that introduced populations may have become infected with novel parasite lineages, it may be difficult to differentiate between parasites that are native and introduced, because malarial parasite lineages often do not show regional or host specificity.

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“…36 These studies identified numerous protozoal, bacterial, and fungal organisms associated with cane toads; however, published reports of disease in Australian cane toads are limited to occasional cases of fungal infection. 3,11,27,36,37 In this paper, we described the pathology of a newly recognized spinal arthropathy of freeranging adult cane toads and propose the etiology to involve interaction between bacterial infection and preexisting degeneration of intervertebral joints.…”

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confidence: 99%

Spinal Arthropathy Associated with Ochrobactrum anthropi in Free-ranging Cane Toads (Chaunus [Bufo] marinus) in Australia

et al. 2008

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Abstract. Inflammatory or degenerative pathology involving the vertebral bodies and/or ventral intervertebral joints has been described in numerous species, both captive and free ranging, including mammals, birds, and snakes, although never in amphibians. We described 15 cases of a newly recognized spinal arthropathy in adult cane toads (Chaunus [Bufo] marinus), an invasive species in Australia. Grossly appreciable lesions consisted primarily of ventral proliferation of bone and cartilage that resulted in ankylosis. Histologic examination of the entire vertebral columns of the 15 affected toads revealed 13 toads to have lesions at multiple intervertebral sites, totalling 41 intervertebral joints with lesions. Most lesions involved bone and cartilage proliferation that resulted in fusion of the joint, with (n 5 15) or without (n 5 9) associated pyogranulomatous inflammation. In the remaining 17 affected joints, histologic lesions were characterized by degeneration of articular cartilage without joint fusion. In addition, in one of these joints, there was also hemorrhage and pyogranulomatous inflammation. Bacterial culture of affected joints in 9 toads and grossly normal joints in 4 control toads resulted in isolation of Ochrobactrum anthropi in 7 affected toads but in none of the controls (P , .01). We proposed an interaction between degenerative and bacterial etiologies in the pathogenesis of this condition. Invasive toads may be predisposed to this condition because of their large size; increased rates of movement; and, possibly, immunosuppression resulting from inhabiting a novel environment.

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Protozoan Parasites of the Cane Toad, Bufo-Marinus, in Australia

Cited by 26 publications

References 0 publications

Giant toads Bufo marinus in Australia and Venezuela have antibodies against 'ranaviruses'

Giant toads Bufo marinus in Australia and Venezuela have antibodies against 'ranaviruses'

Prevalence and evolutionary relationships of haematozoan parasites in native versus introduced populations of common mynaAcridotheres tristis

Spinal Arthropathy Associated with Ochrobactrum anthropi in Free-ranging Cane Toads (Chaunus [Bufo] marinus) in Australia

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