Prevalence, severity, and heritability of Stephanofilaria lesions on cattle in central and southern Queensland, Australia

Sutherst, R. W., Bourne, A. S., Maywald, G. F. and Seifert, G. W. (2006) Prevalence, severity, and heritability of Stephanofilaria lesions on cattle in central and southern Queensland, Australia. Australian Journal of Agricultural Research, 57 7: 743-750. doi:10.1071/AR05265


Author Sutherst, R. W.
Bourne, A. S.
Maywald, G. F.
Seifert, G. W.
Title Prevalence, severity, and heritability of Stephanofilaria lesions on cattle in central and southern Queensland, Australia
Journal name Australian Journal of Agricultural Research   Check publisher's open access policy
ISSN 0004-9409
Publication date 2006-01-01
Sub-type Article (original research)
DOI 10.1071/AR05265
Open Access Status Not Open Access
Volume 57
Issue 7
Start page 743
End page 750
Total pages 8
Place of publication Collingwood, VIC
Publisher Csiro Publishing
Language eng
Subject C1
300405 Animal Protection (Pests and Pathogens)
630199 Livestock not elsewhere classified
Abstract Observations of cattle in central and southern Queensland are collated to de. ne the prevalence and area of Stephanofilaria lesions associated with infestations of the buffalo fly, Haematobia irritans exigua. The observations were made on herds that were being used for other purposes. In a survey of similar to 1500 animals at Belmont in central Queensland in 1982, 98% of cows and 70% of calves had lesions. Most lesions were on the neck and dewlap and 10% were raw and weeping at the time of sampling. The total area of lesions per animal was strongly related to cattle breed and age. Old Bos taurus animals had the greatest area of lesions, whereas young Bos indicus had the least. Heritability estimates were low, averaging 0.01 for calves and 0.18 for cows. A smaller survey of cows and steers at Craighoyle in central Queensland in 1986 showed a higher numbers of lesions and positive correlations between the total lesion area and animal size. The lesion area increased with tick survival, suggesting that tick-resistant animals are also resistant to Stephanofilaria infection. Steers had smaller areas of lesions than cows, as found previously with cattle ticks. Long-term monitoring observations in central and southern Queensland between 1981 and 1986 showed that the total area of lesions was seasonal with a peak in late summer, consistent with the seasonal incidence of buffalo fly. Animals segregated into Low and High lesion herds maintained their differences over time. The lesions penetrated the dermis of the cattle hides and rendered the affected area unusable, but few lesions occurred on valuable parts of the hide so such economic effects are likely to be insignificant. One animal nearly died of a haemorrhage from a lesion on the dewlap and had to be treated. The results can inform policy on buffalo fly control, and biosecurity preparations in relation to the potential establishment of the OldWorld screw-worm fly, Chrysomyia bezziana, in Australia, which will be facilitated by the lesions. The results emphasise the significant animal welfare and biosecurity risks posed by the lesions in northern Australia.
Keyword Agriculture, Multidisciplinary
Tick Boophilus-microplus
Haematobia-irritans-exigua
Sub-tropical Australia
Buffalo Fly
Infestations
Resistance
Nutrition
Ecology
Breeds
Q-Index Code C1

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2007 Higher Education Research Data Collection
School of Agriculture and Food Sciences
 
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Created: Wed, 15 Aug 2007, 19:06:57 EST