Follicular dysplasia in two cows

Mansell,

doi:10.1046/j.1365-3164.1999.00154.x

Cited by 9 publications

(13 citation statements)

References 12 publications

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“…They include colour‐linked follicular dysplasias with an abnormal melanization of the pilosebaceous units such as colour dilution alopecia and black‐hair follicular dysplasia, noncolour‐linked cyclical follicular dysplasias such as recurrent flank alopecia, and noncolour‐linked noncyclical follicular dysplasias 17,18 . Colour‐linked follicular dysplasia has also been described in cows 19,20 . However, none of these conditions reported in dogs and cows are histologically comparable to what we observed in the coatis.…”

Section: Discussionsupporting

confidence: 69%

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Congenital follicular dysplasia in five related coatimundis (Nasua nasua)

Nicolier

Welle

Walzer

et al. 2005

Veterinary Dermatology

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We report a congenital follicular dysplasia in five coatis from four different litters of the same parents born between 1996 and 2001. These coatis were born apparently alopecic with the entire body covered by very short dark hairs, with secondary lichenification of the skin, crusting and scaling. The main histopathological feature consisted of premature cornification of the cortical cells of the hair shaft. Cells were already fully cornified below the Adamson's fringe, leading to a disorganized, fragmented and constricted hair shaft. Based on the history of the animals and the nature of the lesions, a genetic defect in hair shaft keratinization was suspected.

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Section: Discussionsupporting

confidence: 69%

“…17,18 Colour-linked follicular dysplasia has also been described in cows. 19,20 However, none of these conditions reported in dogs and cows are histologically comparable to what we observed in the coatis. Furthermore, in contrast to the coatis, most of these syndromes are not congenital.…”

Section: Discussionmentioning

confidence: 41%

Congenital follicular dysplasia in five related coatimundis (Nasua nasua)

Nicolier

Welle

Walzer

et al. 2005

Veterinary Dermatology

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“…Bovine follicular dysplasia has been described 26–28 . Clinically, this entity is difficult to differentiate from AA.…”

Section: Discussionmentioning

confidence: 99%

“…13 Bovine follicular dysplasia has been described. [26][27][28] Clinically, this entity is difficult to differentiate from AA. It involves black-haired areas of the body, suggesting a similarity with black-hair follicular dysplasia described in dogs.…”

Section: Discussionmentioning

confidence: 99%

Alopecia areata in Eringer cows

Timm

Rüfenacht

Tscharner

et al. 2010

Veterinary Dermatology

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Alopecia areata is a hair loss disorder in humans, dogs and horses with a suspected autoimmune aetiology targeting anagen hair follicles. Alopecia areata is only sporadically reported in cows. Recently, we observed several cases of suspected alopecia areata in Eringer cows. The aim of this study was to confirm the presumptive diagnosis of alopecia areata and to define the clinical phenotype and histopathological patterns, including characterization of the infiltrating inflammatory cells. Twenty Eringer cows with alopecia and 11 Eringer cows without skin problems were included in this study. Affected cows had either generalized or multifocal alopecia or hypotrichosis. The tail, forehead and distal extremities were usually spared. Punch biopsies were obtained from the centre and margin of alopecic lesions and normal haired skin. Histological examination revealed several alterations in anagen hair bulbs. These included peri- and intrabulbar lymphocytic infiltration, peribulbar fibrosis, degenerate matrix cells with clumped melanosomes and pigmentary incontinence. Mild lymphocytic infiltrative mural folliculitis was seen in the inferior segment and isthmus of the hair follicles. Hair shafts were often unpigmented and dysplastic. The large majority of infiltrating lymphocytes were CD3(+) T cells, whereas only occasional CD20(+) lymphocytes were present in the peribulbar infiltrate. Our findings confirm the diagnosis of T-cell-mediated alopecia areata in these cows. Alopecia areata appears to occur with increased frequency in the Eringer breed, but distinct predisposing factors could not be identified.

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“…These include hypotrichosis in the Arabian horse and its crosses, and mane and tail hair dystrophy in the Appaloosa (Fadok 1995b). Follicular dysplasias causing hypotrichosis and alopecia are reported in other species including the cow (Miller and Scott 1990;Mansell 1999), sheep (Mackie and McIntyre 1992) and dog (Miller 1990;Beco et al 1996). However, to date, no report on cases in the horse has been published, although anecdotal evidence exists for its occurrence (Scott 1999).…”

Section: Introductionmentioning

confidence: 99%