Comparison of gene probe and conventional methods for the differentiation of ovine footrot isolates of Dichelobacter nodosus
| Autor: | Stephen J. Billington, Julian I. Rood, Don Liu, Pauline Howarth, Michael A. Palmer, Ian Links, David J. Stewart, Volker Haring, Vaughan Ja, David R. Pitman, Weng K. Yong |
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| Rok vydání: | 1996 |
| Předmět: |
Sheep Diseases
Virulence Dichelobacter nodosus Biology Polymerase Chain Reaction Microbiology law.invention Plasmid law Foot rot Animals Foot Rot Gene Polymerase chain reaction DNA Primers Gram-Negative Anaerobic Bacteria Sheep Base Sequence General Veterinary General Medicine biology.organism_classification Genes Bacterial DNA Probes Gram-Negative Bacterial Infections Cardiobacteriaceae Molecular probe |
| Zdroj: | Veterinary Microbiology. 52:127-141 |
| ISSN: | 0378-1135 |
| Popis: | In a collaborative study that involved four Australian veterinary diagnostic laboratories a gene probe test based on the recombinant plasmids pJIR318, pJIR314B, and pJIR313, which contain genomic vap or vrl regions, was compared with conventional tests used for the differential diagnosis of ovine footrot. A total of 771 clinical dichelobacter nodosus isolates were tested and designated as belonging to one of several gene probe categories. The results showed that 87% of the virulent isolates belonged to gene probe category 1, compared to only 6% of the benign isolates. It was concluded that there was good correlation between the gene probe test and the virulence designation of these isolates as well as the results of elastase, gelatin-gel and protease isoenzyme tests. Furthermore, the gene probe test was converted to a polymerase chain reaction (PCR)-based test. It is suggested that diagnostic laboratories consider carrying out both this PCR test and tests based on the extracellular proteases of D. nodosus. |
| Databáze: | OpenAIRE |
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