Staphylococcus hyicus in skin lesions of horses

Abstract

Summary Staphylococcus hyicus (subspecies hyicus) was isolated as the only pathogenic organism from two independent cases of dermatitis of the lower parts of the limbs (grease heel) in horses. The organism was recovered together with other pathogenic staphylococci from similar conditions in two other horses of different origins. These conditions were characterised by epidermolysis, alopecia and crust formation. They responded quickly to antibiotic treatment. The organism was also isolated from a long standing case of “summer eczema” which healed without antibiotic treatment, and from a horse with dermatophilosis (streptotrichosis, Dermatophilus congolensis infection). Experimentally, Staph hyicus caused epidermolysis, exudation and inflammation in the superficial layers of the skin. Résumé Staphylococcus hyicus a été isolé et considéré comme l'unique agent pathogène, cause de deux cas distincts de dermatite de la partie inférieure des membranes chez le cheval (Mal de Blanc). On trouva cet agent avec d'autres staphylocoques pathogènes, chez deux autres chevaux. Les lésions comportaient une épidermolyse, une alopécie, des croûtes; elles cédèrent promptement à un traitement antibiotique. On isola également cet organisme d'un animal atteint “d'eczéma d‘été” qui guérit sous antibiotique; et d'un cheval atteint de Dermatophylose (Streptotricose, infection a Dermatophilus congolensis). Expérimentalement, Staph hyicus provoqua une épidermolyse, des exsudations et l'inflammation des couches superficielles de la peau. Zusammenfassung Staphylococcus hyicus (subsp hyicus) wurde als einziger pathogener Keim aus unabhängigen Fällen von Dermatitis der Gliedmassenenden (Mauken) bei Pferden isoliert. Der Keim wurde zusammen mit anderen pathogenen Staphylokokken aus vergleichbaren Veränderungen von zwei weiteren Pferden anderer Herkunft isoliert. Die Veränderungen bestanden in Epidermolysis, Alopezie und Krustenbildung. Sie sprachen gut auf antibiotische Behandlung an. Auch von einem hartnäckigen Fall von Sommerekzem konnte der Erreger isoliert werden — die Abheilung erfolgte ohne antibiotische Therapie — und von einem Pferd mit Dermatophilose (Streptotrichosis; Dermatophilus congolensis Infektion). Experimentell vermochte Staph hyicus Epidermolyse, Exsudation und Entzündung in den oberflächlichen Schichten der Haut hervorzurufen.

Atopic dermatitis: the relationship to temperature and seasonality in the United States

“…Interestingly, there is evidence of equine AD flares in the summer . There are many similarities between the disease that occurs in humans and animals, and canine AD seems to be the most closely related to human AD .…”

Evaluation of Two Commercial Systems and a New Identification Scheme Based on Solid Substrates for Identifying Coagulase‐Negative Staphylococci from Bovine Mastitis

“…The best‐characterized disease complex in animals associated with a CNS infection is exudative epidermitis in piglets, caused by S. hyicus (this species is sometimes referred to as belonging to the coagulase‐positive group). Sporadic reports of dermatitis where S. hyicus has been isolated among farm animals other than pigs have been published ( Devriese, 1979; Devriese et al, 1983). CNS are often isolated from superficial bacterial infections in cats and the predominating species, S. felis , is more or less host‐specific for cats ( Igimi et al, 1989).…”

Fungal and Bacterial Isolation from Racehorses with Infectious.

“…hyicus is known as the causal pathogen of exudative epidermites in pigs [21]. This is isolated from healthy or [3,4,20,21]. In this study, it was suggested that S. hyicus was closely related to dermatosis developing on the back, side, and chest regions.…”

“…On the other hand, there have been few studies on the causes of infectious dermatosis other than dermatophytosis [3,4,15], and such a study has never been for racehorses. The purpose of this study was to clarify the microbiological causes of dermatosis in racehorses and to gather data on the diagnosis and treatment of the infectious dermatosis.…”