Productivity effects of bovine mange and control with ivermectin

Rehbein, Steffen; Visser, Martin; Winter, Renate; Trommer, B; Matthes, H.-F.; Maciel, Ana E.; Marley, Sara E.

doi:10.1016/s0304-4017(03)00140-7

Cited by 59 publications

(37 citation statements)

References 18 publications

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“…In other animal models, the presence of asymptomatic seroreactors has been associated to the incubation phase [7], the subclinical course of the infestation [10] or the persistence of antibodies after therapy [23,25]. As regards ruminants, persistence of specific antibodies for more than two months after successful treatment with a macrocyclic lactone has been demonstrated in cattle [32]. The possibility to reveal a S. scabiei infestation status in asymptomatic chamois is of a great interest for prospective and retrospective studies assessing the distribution and prevalence of S. scabiei infestations in this host and other related wild ruminants suffering from epidemic scabies.…”

Section: Discussionmentioning

confidence: 99%

“…Out of the scabietic chamois, 14 were mildly affected (less than 10% of the skin surface showing alopecia and focal hyperkeratotic areas), 18 were moderately affected (diffuse hyperkeratosis and localised thick crusts over 10-25% of the skin surface) and 8 were severely affected (thick fissured crusts over up to 40% of the skin surface). Sera were obtained also from: (i) 32 Italy). For the sake of brevity, the last ones will be lately cited as "healthy exposed".…”

Section: Chamois Seramentioning

confidence: 99%

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Biotin-avidin amplified ELISA for detection of antibodies to Sarcoptes scabiei in chamois (Rupicapra spp.)

et al. 2004

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-Scabies is a major threat to the well being of mountain-dwelling Bovid hosts, Rupicapra rupicapra and Rupicapra pyrenaica. Severe outbreaks are in progress over a significant part of their distribution area and resource managers demand improved methods to monitor, analyse and possibly forecast the spread and effects of scabies at the population level. An amplified capture enzyme-linked immunosorbent assay was developed to detect antibodies to Sarcoptes scabiei in chamois (Rupicapra spp.) serum. The method used the biotin-avidin amplification system and was validated on a panel of 144 serum samples, of which 40 were obtained from scabietic and 104 from healthy unexposed individuals originating from a scabies-free area. The antigen, a whole body extract of the various developmental stages of S. scabiei, was prepared from mites actively leaving the skin lesions of naturally infested red foxes (Vulpes vulpes). The resulting LAB-ELISA was characterised by 93% sensitivity, 97% specificity and a high degree of repeatibility. A single seroreactor was found amongst 32 chamois affected with skin pathologies other than scabies, including infestations by other Acarina (Trombicula spp. and Ixodid ticks). Antibodies to S. scabiei were present in 26 out of 169 sera (15.4%) obtained by clinically healthy chamois within a scabies outbreak area, indicating that asymptomatic infestations by S. scabiei can be revealed by serological methods in the studied Caprinae hosts.Sarcoptes / chamois / ELISA / avidin-biotin

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Section: Discussionmentioning

confidence: 99%

Section: Chamois Seramentioning

confidence: 99%

Biotin-avidin amplified ELISA for detection of antibodies to Sarcoptes scabiei in chamois (Rupicapra spp.)

et al. 2004

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“…Veterinary concerns include difficulties in diagnosis and control and the economic effect of mange on feed conversion efficiency. In production herds, the intense pruritus associated with the disease interferes with milk production, weight gain, and leather quality and can inflict serious economic losses on primary industries (35,95).…”

Section: Animal Scabiesmentioning

confidence: 99%

Problems in Diagnosing Scabies, a Global Disease in Human and Animal Populations

2007

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SUMMARY Scabies is a worldwide disease and a major public health problem in many developing countries, related primarily to poverty and overcrowding. In remote Aboriginal communities in northern Australia, prevalences of up to 50% among children have been described, despite the availability of effective chemotherapy. Sarcoptic mange is also an important veterinary disease engendering significant morbidity and mortality in wild, domestic, and farmed animals. Scabies is caused by the ectoparasitic mite Sarcoptes scabiei burrowing into the host epidermis. Clinical symptoms include intensely itchy lesions that often are a precursor to secondary bacterial pyoderma, septicemia, and, in humans, poststreptococcal glomerulonephritis. Although diagnosed scabies cases can be successfully treated, the rash of the primary infestation takes 4 to 6 weeks to develop, and thus, transmission to others often occurs prior to therapy. In humans, the symptoms of scabies infestations can mimic other dermatological skin diseases, and traditional tests to diagnose scabies are less than 50% accurate. To aid early identification of disease and thus treatment, a simple, cheap, sensitive, and specific test for routine diagnosis of active scabies is essential. Recent developments leading to the expression and purification of S. scabiei recombinant antigens have identified a number of molecules with diagnostic potential, and current studies include the investigation and assessment of the accuracy of these recombinant proteins in identifying antibodies in individuals with active scabies and in differentiating those with past exposure. Early identification of disease will enable selective treatment of those affected, reduce transmission and the requirement for mass treatment, limit the potential for escalating mite resistance, and provide another means of controlling scabies in populations in areas of endemicity.

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“…It is an important disease in cattle, pigs, sheep and goats worldwide, with many economical implications in prophylaxis and treatment (Alonso de Vega et al, 1998;Rehbein et al, 2003;Tarigan and Huntley, 2005;Menzano et al, 2007). Sarcoptic mange seems to show more dramatic effects in wildlife, severely affecting the population dynamics of different species (Mörner, 1992;Balestrieri et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Sarcoptic mange in red deer from Spain: Improved surveillance or disease emergence?

Oleaga

Casáis

González‐Quirós³

et al. 2008

Veterinary Parasitology

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Concern about emerging diseases has risen in recent years, and multihost situations have become increasingly relevant for wildlife management and conservation. We present data on Asturias, northern Spain, where 80 mangy red deer (Cervus elaphus) have been found since the beginning of the epizootic in chamois (Rupicapra pyrenaica parva) in 1993. We combine field and necropsy data with the results of a serosurvey using an in-house ELISA test to evaluate if deer mange due to Sarcoptes scabiei is an emerging disease in this area. The mean number of deer mange cases per year was 5, with a maximum of 16. No significant relationship was detected between monthly temperatures, rainfall or number of days with snow cover and the annual number of sarcoptic mange cases in red deer. Only 4 mangy red deer (5%) were detected outside the limits of scabietic chamois distribution during the same year, and all were less than 2500 m away from that limit. The longest distance reported between two consecutive mangy deer locations was 18 km. Mange cases were significantly more frequent in stags than in hinds and in adults than in juvenile deer. The time of the first mange detection in chamois in each sector, year with minimum number of chamois recorded, year with maximum chamois population decline rate and chamois density offered no significant correlation with red deer mange cases appearance moment and frequency. In the mange affected area, ELISA testing of 327 blood samples from hunter-harvested deer without obvious mange-compatible lesions revealed only 4 seropositive animals. All 83 sera from hunting preserves without clinical cases yielded negative ELISA results. According to these epidemiological data mange does not seem to threaten red deer populations in Asturias. However, continued monitoring of deer health and ELISA testing for sarcoptic mange is advisable. #

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Productivity effects of bovine mange and control with ivermectin

Cited by 59 publications

References 18 publications

Biotin-avidin amplified ELISA for detection of antibodies to Sarcoptes scabiei in chamois (Rupicapra spp.)

Biotin-avidin amplified ELISA for detection of antibodies to Sarcoptes scabiei in chamois (Rupicapra spp.)

Problems in Diagnosing Scabies, a Global Disease in Human and Animal Populations

Sarcoptic mange in red deer from Spain: Improved surveillance or disease emergence?

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