This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacterial infections, Subject name: Dental
All are bacterial infections except 
Select and explain. 
A. Ecthyma pyogenicum, B. Ecthyma gangrenosum, C. Ecthyma contagiosum, D. Bullous Impetigo
C: Ecthyma contagiosum
Answer: C: Ecthyma contagiosum 
Explanation: Poxviruses Orf (ecthyma contagiosum; Orf virus; genus = Parapox): - It is a result of contact with infected animals (sheep, goats, or reindeer; usually on udders/perioral areas of ewes). # Develop one to few lesions at contact site (usually hands). # RFs: ceain jobs (shepherds, butchers, and veterinarians) . # Six lesion stages: maculopapular (umbilicated) - targetoid - acute (weeping nodule) - regenerative (nodule w/ thin crust and black dots) - papillomatous - regressive (crust overlying resolving lesion). # Self-resolves . # Diagnosis histology (depends on stage) or PCR. Ref:- Review of Dermatology by Alikhan; pg num:-285