Clinical and Histopathological Findings in Pustular Psoriaform Dermatitis (Pityriasis Rosea) in Pigs

Abstract

ABSTRACT. Three cases of pustular psoriaform dermatitis (pityriasis rosea) in pigs were clinically and histopathologically examined. Grossly, the affected skin was characterized by multiple, circumscribed lesions. Three pigs were the descendants derived from t he same Landrace boar. Skin lesions expanded centrifugally to became ring-shaped plaques. There were no abnormal values in hematological and serum biochemical profiles. Histopathologically, the epidermis showed remarkable thickening. The dermal lesions were chara cterized by a prominent component of superficial and deep perivascular infiltration of eosinophils. Dilatation of microvasculature was accompanied with congested vessels. These results revealed that the etiology of pustular psoriaform dermatitis in pigs was associated with a hereditary predisposition derived from the specific boars. This dermatosis is histopathologically characterized by micro circulatory disturbances with infiltration of abundant eosinophils. KEY WORDS: eosinophil, microcirculatory disturbance, pustular psoriaform dermatitis (pityriasis rosea).

Primary skin diseases and cutaneous manifestations of systemic diseases in swine

“…In the category "others", skin diseases were added that could not be inserted with bacterial, viral, allergic or neoplastic. Pityriasis rosea corresponded to 5.8% of diagnoses and affected animals in growth, as described by Kimura & Doi (2004), different from Altrock & Höltig (2013), who mention affecting nursery pigs. The cause of this disease is still unknown, but some authors believe that it is hereditary (Torrison & Cameron 2019), others cite Scopulariopsis brevicaulis as a possible agent (Purchio et al 1980).…”

“…The cause of this disease is still unknown, but some authors believe that it is hereditary (Torrison & Cameron 2019), others cite Scopulariopsis brevicaulis as a possible agent (Purchio et al 1980). Kimura & Doi (2004) describe three pigs and even using different methods of analysis (microbiological, histopathological, hematological and blood biochemistry) have not been able to elucidate the cause of this pathology. Histologically the lesions observed were similar to those described in the literature (Kimura & Doi 2004, Mauldin & Peters-Kennedy 2016.…”

“…Kimura & Doi (2004) describe three pigs and even using different methods of analysis (microbiological, histopathological, hematological and blood biochemistry) have not been able to elucidate the cause of this pathology. Histologically the lesions observed were similar to those described in the literature (Kimura & Doi 2004, Mauldin & Peters-Kennedy 2016.…”

Multitask Imidazolium Salt Additives for Innovative Poly(l-lactide) Biomaterials: Morphology Control, Candida spp. Biofilm Inhibition, Human Mesenchymal Stem Cell Biocompatibility, and Skin Tolerance

“…These pig skin permeation tests with the PLA and IS-containing PLA films showed no cellular changes in the epidermis (like hyperplasia, thickness, and parakeratosis) when compared to the negative control sample . This shows that the PLA biomaterials do not cause acute microscopic lesions in the skin of the pig ear, which indicates their safe use in topical applications. , …”

“…53 This shows that the PLA biomaterials do not cause acute microscopic lesions in the skin of the pig ear, which indicates their safe use in topical applications. 54,55 ■ CONCLUSIONS From the performed studies, it is possible to conclude that the incorporation of the ISs C 16 MImCl and C 16 MImMeS in PLA by the solvent casting process provides access to biomaterials with advanced properties, with antibiofilm activity against Candida species, showing potential for use in the manufacture of medical devices. The PLA-based biomaterials with IS showed antibiofilm activity against C. tropicalis, C. parapsilosis, and C. albicans.…”