Porcine juvenile pustular psoriasiform dermatitis in Korea

자돈 농포성 건선양 피부염 증례 보고

  • Accepted : 2005.07.28
  • Published : 2005.09.22


Porcine juvenile pustular psoriasiform dermatitis (PJPPD) is a disease of young pigs and characterized by nonpruritic round eruption of skin. The cause of this disease is yet undetermined but is presumed to be genetic predisposition. There may be few opportunities for veterinarian to detect this disease compared with actual situation in field because these lesions resolve spontaneously in two months. The authors detected spontaneous PJPPD case and performed clinical and pathological studies on three pigs from one farm. The specific skin lesions were observed in the forty-day old pigs of mixed breed, which were produced by the sows received semen from the same boar, restrictively. However, there was no skin lesion of pigs in suckling or fattening periods. Grossly, lesions were commonly found on the ventral abdominal part as a papule and were spreaded to the skin of whole body. With the spreading of lesions centrifugally, skin was showed as a umbilicated plaques or mosaic pattern with a few pustules or crusts. Microscopically, the most prominent lesion was the psoriasiform hyperplasia with acanthosis, down growth of rete ridges, exocytosis of eosinophils and neutrophils, ballooning degeneration of superficial epidermis, and koilocytic degeneration of keratinocytes. Additionally, there were moderate dermal edema and severe mixed cellular infiltration, especially eosinophils. No infectious agent which can cause the skin lesion, was detected or cultured, and no lesion caused by infectious agents was also observed, pathologically. With pathological results of this study, it is supposed that pathogenesis or severity of PJPPD may be related to the infiltration of eosinophil or hypersensitivity.


  1. Carlton WW, McGavin MD. Thomson's special veterinary pathology, 2nd ed. p. 471. Mosby, St. Louis, 1995
  2. Concoran CJ. Pityriasis rosea in pigs. Vet Rec 1964, 76, 1407-1409
  3. Davis GB, Kyle MG. Pityriasis rosea in pigs. NZ Vet J 1969, 17, 71 https://doi.org/10.1080/00480169.1969.33790
  4. Done JT. Pityriasis rosea in pigs. Vet Rec 1964, 76, 1507-1508
  5. Doster AR. Skin disease of swine. Swine Health Prod 1995, 3, 256-261
  6. Dunstan RW, Rosser EJ. Does a condition like human pityriasis rosea occurs in pigs? Am J Dermatopathol 1986, 8, 86-89 https://doi.org/10.1097/00000372-198602000-00015
  7. Jubb KVF, Kennedy PC, Palmer N. Pathology of Domestic Animals, 4th ed. pp. 704-705. Academic press, San Diego, 1993
  8. McDermid KA. Ontario certified herd policy for swine. Can Vet J 1964, 5, 95
  9. Mowafy M, Cassens RG. Microscopic structure of pig skin. J Anim Sci 1975, 41, 1281-1290 https://doi.org/10.2527/jas1975.4151281x
  10. Prophet EB, Arrigton JB, Sobin LH. Laboratory Methods in Histotechnology, p. 146. Armed Forces Institute of Pathology, Washington DC, 1992
  11. Quinn PJ, Carter ME, Markey B, Carter GR. Clincal veterinary microbiology, pp. 367-374. Wolfe, Grafos, 1994
  12. Radostitis OM, Blood DC, Gay CC. Veterinary Medicine, 8th ed. pp. 539-540, 643-644, 1720. Bailliere Tindall, London, 1994
  13. Straw BE, D'allaire S, Mengeling WL, Taylor D. Disease of Swine, 8th ed. p. 955. Iowa State University, Iowa, 1999
  14. Thomson R. Pityriasis rosea in a herd of swine. Can Vet J 1960, 1, 449-451