Growth of populations of lice, Damalinia ovis, on sheep and their effects on production and processing performance of wool

Wilkinson, F C; Chaneet, G C de; Beetson, B.R.

doi:10.1016/0304-4017(82)90059-0

Cited by 51 publications

(21 citation statements)

References 5 publications

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“…Greasy wool from lousy sheep is more yellow (Kettle and Lukies, 1982;James et al, 2011) and less bright (Kettle and Lukies, 1982), though when scoured it has been reported that no difference in colour exists when objectively measured (James et al, 2011). SL appears to be slightly reduced by louse infestation (Wilkinson et al, 1982;James et al, 2011) although some studies report no effect (Cleland et al, 1989). The effect of louse infestation on SS remains less clear.…”

Section: Licementioning

confidence: 86%

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On-farm factors affecting physical quality of Merino wool. 1. Nutrition, reproduction, health and management

McGregor

Graaf

Hatcher

2016

Small Ruminant Research

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Section: Licementioning

confidence: 86%

“…Niven and Pritchard (1985) reported sheep with moderate to heavy infestations produced less sound wool (1.7 vs 3.0 kg/head) and more cast wool (0.4 vs 0.1 kg/head) than sheep with few lice present. Several reports indicate lice have no effect on FD (Wilkinson et al, 1982;Niven and Pritchard, 1985;Cleland et al, 1989;James et al, 2011).…”

Section: Licementioning

confidence: 97%

On-farm factors affecting physical quality of Merino wool. 1. Nutrition, reproduction, health and management

McGregor

Graaf

Hatcher

2016

Small Ruminant Research

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“…However, disease in cervids has resulted from severe infestations of sucking lice from other hosts (Brunetti and Cribbs, 1971;Foreyt et al, 1986). Poor health and decreased rate of gain have been associated with combined infestations of sucking and chewing lice in cattle (Kettle, 1974;Yager and Scott, 1993), and chewing lice are an important cause of decreased wool quality in sheep (Wilkinson et al, 1982;Yager and Scott, 1993;James, 1999). Ectoparasites are known to cause alopecia in various wildlife species.…”

Section: Discussionmentioning

confidence: 99%

Hair-Loss Syndrome in Black-Tailed Deer of the Pacific Northwest

Bildfell

Mertins

Mortenson

et al. 2004

Journal of Wildlife Diseases

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A widespread hair-loss syndrome (HLS) has affected Columbian black-tailed deer (Odocoileus hemionus columbianus) in western Oregon and Washington (USA) since 1996. In order to better characterize the condition, 21 HLS-affected black-tailed deer (BTD) were necropsied, and body condition, parasite burdens, and significant lesions were noted. All deer were in poor body condition, and at least 17 had severe internal parasite burdens. A consistent finding was the presence of large numbers of chewing lice, identified as an indeterminate species of Damalinia (Cervicola). Four animals were infested with intrafollicular Demodex sp., the first report of this genus of mites in BTD. We postulate that the hair loss is largely due to ectoparasitism by a species of chewing louse that represents a new pathogen for BTD. This loss of pelage also may be an important contributor to the poor body condition of these animals.

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“…At current levels they are believed to have only a small effect on productivity (Blood and Radostits, 1989;Heath et al, 1995;James, 1999;James et al, 1998;Wilkinson et al, 1982), and in the model are assumed to affect 50% of animals resulting in an average loss of £1/affected animal. Ticks rarely cause direct losses but as disease vectors (tick borne fever (TBF), louping ill, and tick pyaemia) are important initiators of production losses (Blood and Radostits, 1989;Brodie et al, 1986;Fincham, 1983).…”

Section: The Cost Of Lossesmentioning

confidence: 99%