Seasonal allergic dermatitis in sheep

Connan, R. M.; Lloyd, S.

doi:10.1136/vr.123.13.335

Cited by 24 publications

(37 citation statements)

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“…O diagnóstico de dermatite alérgica sazonal foi realizado com base nos achados epidemiológicos, clínicos e histopatológicos, semelhantes aos descritos na dermatite alérgica em ovinos e pela identiϐicação de Culicoides insignis Lutz (Connan & Lloyd 1988, Yeruham et al 1993, Souza et al 2005, Corrêa et al 2007.…”

Section: Discussão E Conclusõesunclassified

“…Em casos já relatados de dermatite alérgica sazonal em ovinos lanados, além das lesões na cabeça, foram observadas lesões abaixo do abdômen, úbere, tetas, patas e lábios (Connan & Lloyd 1988, Yeruham et al 1993, Souza et al 2005, Corrêa et al 2007. As áreas hipersensíveis do abdô-men, úbere e patas de ovinos correspondem às áreas picadas por Culicoides obsoletus Meigen (Yeruham et al 1993).…”

Section: Discussão E Conclusõesunclassified

“…O emagrecimento e o autotraumatismo aqui relatado geralmente são sinais decorrentes da característica marcante da doença que é o intenso prurido (Connan & Lloyd 1988). Souza et al (2005) e Corrêa et al (2007) macroscopicamente caracterizaram dois padrões de lesões: uma crônica, com alopecia descamativa e crostosa e edema; e outra aguda na qual além da alopecia observa-se eritema acentuado associado a grande quantidade de pápulas, pús-tulas e colaretes epidérmicos.…”

Section: Discussão E Conclusõesunclassified

“…Na espécie ovina há relatos da doença na Inglaterra (Connan & Lloyd 1988), Israel (Yeruham et al 1993(Yeruham et al , 2004 e Espanha (Ordeix et al 2000). No Brasil ocorre nas regiões Sul (Schild et al 1993, Souza et al 2005, Corrêa et al 2007, Ferreira 2007, Norte (Barbosa et al 2011, Vinhote et al 2010) e um caso isolado foi descrito na região nordeste (Macêdo et al 2008).…”

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Dermatite alérgica sazonal em ovinos deslanados no nordeste do Brasil

et al. 2012

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Pesq. Vet. Bras. 32(6) The skin of the affected sheep was whitish, irregularly thickened, with alopecia, crusts, and intense pruritus. Those lesions were localized more frequently in the head (ears and periocular and frontal regions) but in some animals the dorsum and croup were also affected. Histologic lesions of the epidermis were hyperkeratosis, acanthosis, hypergranulosis, and moderate spongiosis. The dermis showed inϐiltration by eosinophils, macrophages and plasma cells, mainly perivascular. The hair follicles showed keratosis and the sudoriparous glands were dilated. No changes were observed in the differential blood count. In April and June 2010 insects were captured by the use of CDC light trap. Forty three out of 110 dipterous captured were identiϐied as Culicoides insignis Lutz. It is concluded that the disease is a seasonal allergic dermatitis associated with C. insignis bites. A pele apresentava lesões alopécicas, crostosas, enrugadas, esbranquiçadas e com intenso prurido, localizados na região da cabeça (orelhas, ao redor dos olhos e região frontal), região dorsal do corpo e garupa. Histologicamente, a epiderme apresentou hiperqueratose, acantose, hipergranulose e moderada espongiose. Na derme havia

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Section: Discussão E Conclusõesunclassified

Section: Introductionunclassified

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Dermatite alérgica sazonal em ovinos deslanados no nordeste do Brasil

et al. 2012

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“…Seasonal allergic dermatitis is a skin disease that is associated with insect bites and affects several animal species, including horses (Henry & Bory 1937, Baker & Quinn 1978, Fadok & Greiner 1990, Schild et al 2003, Oliveira-Filho et al 2012, sheep (Connan & Lloyd 1988, Schild et al 2003, Corrêa et al 2007, Souza et al 2005, Barbosa et al 2011, Portela et al 2012, cattle (Yeruham et al 1993), mules, goats (Yeruham et al 1997, Macêdo et al 2008, felines (Mason & Evans 1991), and man (Penneys et al 1989, Brummer-Korvenkontio et al 1994.…”

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confidence: 99%

Allergic dermatitis caused by Culicoides in Texel sheep in the state of Pará, Brazil

et al. 2017

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Clinical and epidemiological data were obtained during monthly visits to the farm. Skin biopsies were performed for histopathological examinations, and insects were captured with Centers for Disease Control and Prevention (CDC) traps and live-bait entomological vacuum devices. The property housed a herd of both genders, with 45 Santa Inês sheep of different ages and 72 Texel adults. Of the 72 Texel sheep, 56 were affected. Of these, 24 exhibited alopecia, erythema, edema, and crust in the ears, on top of the head, and less often, around the eyes. In addition to the lesions described above, 14 animals exhibited hyperpigmentation of the ears and/or around the eyes and crust in the nose. Another 18 animals exhibited chronic lesions characterized by deformed and thickened ears, alopecia with hyperpigmentation, and in most cases, secondary bacterial infections with abscesses and/or myiasis. Some of these animals had lost part of their ears. Histologically, the lesions were characterized as orthokeratotic hyperkeratosis, acanthosis, vacuolization, and necrosis of epidermal cells. An inflammatory infiltrate was present in the dermis, which was composed mainly of eosinophils and macrophages, some lymphocytes and mast cells, and few neutrophils, in addition to edema and collagen deposition. The Santa Inês sheep were not affected. Among the captured insects, 294 specimens of Culicoides (Hoffmania) plaumanni Spinelli, 57 specimens of C. (Hoffmania) insignis Lutz, and 27 specimens of other Culicoides species were identified. We conclude that C. plaumanni, C. insignis, and possibly other Culicoides species are involved in the etiology of allergic dermatitis in Texel sheep in the state of Pará. Santa Inês sheep in the same region and under the same conditions were not affected, which suggests lower susceptibility of these animals.

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Allergic Diseases of Livestock Species

Foster

2013

Veterinary Allergy

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Seasonal allergic dermatitis in sheep

Cited by 24 publications

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Dermatite alérgica sazonal em ovinos deslanados no nordeste do Brasil

Dermatite alérgica sazonal em ovinos deslanados no nordeste do Brasil

Allergic dermatitis caused by Culicoides in Texel sheep in the state of Pará, Brazil

Allergic Diseases of Livestock Species

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