Feast of Sacrifice and Orf, Milan, Italy, 2015–2018

Orf (ecthyma contagiosum) is an infection of the skin caused by a DNA virus belonging to the genus Parapoxvirus. We recently observed 7 cases of orf in Muslim men living in the metropolitan area of Milan, Italy, who acquired the infection after the Feast of Sacrifice.

Orf (ecthyma contagiosum) is an infection of the skin caused by a DNA virus belonging to the genus Parapoxvirus. We recently observed 7 cases of orf in Muslim men living in the metropolitan area of Milan, Italy, who acquired the infection after the Feast of Sacrifice.
Orf virus usually infects sheep and goats. Humans are infected by handling infected meat from these animals; orf is considered an occupational disease in shepherds, shearers, veterinarians, butchers, and cooks (1).
In the last few years, orf has occurred after the Muslim Feast of Sacrifice (Eid al-Adha) (1)(2)(3)(4)(5)(6)(7)(8)(9)(10). In 2014, we reported a case of orf that appeared after sheep slaughtering for this feast (1). During 2015-2018, we observed 7 additional cases in Muslim men 18-61 years of age who were of Moroccan, Tunisian, or Egyptian origin. They had been infected 2-3 weeks after lamb slaughtering for the feast (Table). One patient was a butcher. In all patients, 1 hand and/or fingers were involved. In 4 patients, orf presented with erythematous pustules; 3 of these patients had ulcerated nodules. In all patients, clinical diagnosis was confirmed by histopathologic examinations.
In most reported cases, orf appeared days or weeks after the Feast of Sacrifice. This feast is celebrated 2 months and 10 days after the end of Ramadan; the exact date varies (4). During the feast, many Muslim families kill a lamb, which has to be bled alive (4). Only men may kill the lamb. Orf occurs more often in men; however, it occurs also in women, who often handle the infected meat with bare hands during preparation and cooking.
In conclusion, in the metropolitan area of Milan, where ≈250,000 Muslims reside, we recently observed 7 patients with orf acquired during the Feast of Sacrifice. Prevention measures are difficult. For example, most of the Muslims living in the metropolitan area of Milan are Moroccans, who travel to Italy by car, carrying the infected meat; thus, no prevention measures have been taken.

About the Author
Dr. Veraldi is a dermatologist and venereologist at the Dermatology Unit and head of the Postgraduate School of Dermatology and Venereology at the University of Milan. His primary research interests are infectious and parasitic diseases of the skin.