Investigations into the biology of three ‘phycomycotic’ agents pathogenic for horses in Australia.
Abstract: Although 'phycomycosis' is a common disease of horses in northern Australia little is known about the causative fungi. In this paper the laboratory methods for diagnosis are described. These revealed 38 cases caused by Pythium sp. (Hyphomyces destruens), 6 cases caused by Basidiobolus haptosporus and 2 caused by Conidiobolus coronatus. Laboratory studies on the chemotatic behaviour of zoospores of Pythium sp. showed that they were strongly attracted to both animal hairs and plant tissue. Because of this behaviour a simple baiting method using human hair was used to trap the fungus from water samples taken from different locations near Townsville, Queensland. B. haptosporus was isolated by indirect culture from the faeces of 5 bearded dragon lizards (Amphibolurus barbatus) captured near a small creek near Brisbane. By combining previously published information with data obtained in the present study, ecological life-cycles for Pythium sp., B. haptosporus and C. coronatus are proposed. They include mechanisms whereby horses may become infected.
Publication Date: 1983-01-17 PubMed ID: 6682179DOI: 10.1007/BF00443905Google Scholar: Lookup
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- Journal Article
- Research Support
- Non-U.S. Gov't
Summary
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The research article focuses on the study of three fungi that cause a common disease, ‘phycomycosis’, in horses in northern Australia and proposes possible ecological life-cycles for these fungi based on laboratory and field experiments.
Introduction and Purpose:
- The investigation was carried out because of the widespread presence of ‘phycomycosis’ among horses in northern Australia and the limited knowledge about the fungi causing this disease.
Research Methodology:
- The research describes the laboratory procedures used to diagnose the diseases.
- It identified 38 cases of Pythium sp., 6 cases of Basidiobolus haptosporus, and 2 cases of Conidiobolus coronatus.
- Zoospores of Pythium sp. were studied in the laboratory to understand their chemotactic behaviour.
- The researchers found that these zoospores showed strong attraction towards animal hairs and plant tissues.
Data Collection and Analysis:
- A baiting method with human hair was used to trap the Pythium sp. fungus from water samples collected from different locations near Townsville, Queensland. This confirmed the chemotactic behaviour of the zoospores observed in lab conditions.
- Basidiobolus haptosporus was isolated indirectly from fecal content of five bearded dragon lizards captured near a creek in Brisbane.
Findings and Conclusion:
- The combination of previously published information with the first-hand data collected helped propose ecological life-cycles for Pythium sp., B. haptosporus, and C. coronatus.
- The proposed life-cycles include mechanisms of how horses in northern Australia may get infected with these pathogens.
Cite This Article
APA
Miller RI.
(1983).
Investigations into the biology of three ‘phycomycotic’ agents pathogenic for horses in Australia.
Mycopathologia, 81(1), 23-28.
https://doi.org/10.1007/BF00443905 Publication
Researcher Affiliations
MeSH Terms
- Animals
- Australia
- Fungi / isolation & purification
- Horse Diseases / microbiology
- Horses
- Mycoses / microbiology
- Mycoses / veterinary
- Pythium / isolation & purification
References
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Citations
This article has been cited 12 times.- Yolanda H, Krajaejun T. Global Distribution and Clinical Features of Pythiosis in Humans and Animals. J Fungi (Basel) 2022 Feb 11;8(2).
- Mar Htun Z, Laikul A, Pathomsakulwong W, Yurayart C, Lohnoo T, Yingyong W, Kumsang Y, Payattikul P, Sae-Chew P, Rujirawat T, Jittorntam P, Jaturapaktrarak C, Chongtrakool P, Krajaejun T. Identification and Biotyping of Pythium insidiosum Isolated from Urban and Rural Areas of Thailand by Multiplex PCR, DNA Barcode, and Proteomic Analyses. J Fungi (Basel) 2021 Mar 24;7(4).
- do Carmo PMS, Uzal FA, Riet-Correa F. Diseases caused by Pythium insidiosum in sheep and goats: a review. J Vet Diagn Invest 2021 Jan;33(1):20-24.
- Krajaejun T, Kittichotirat W, Patumcharoenpol P, Rujirawat T, Lohnoo T, Yingyong W. Data on whole genome sequencing of the oomycete Pythium insidiosum strain CBS 101555 from a horse with pythiosis in Brazil. BMC Res Notes 2018 Dec 11;11(1):880.
- Patumcharoenpol P, Rujirawat T, Lohnoo T, Yingyong W, Vanittanakom N, Kittichotirat W, Krajaejun T. Draft genome sequences of the oomycete Pythium insidiosum strain CBS 573.85 from a horse with pythiosis and strain CR02 from the environment. Data Brief 2018 Feb;16:47-50.
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