Also see Mastitis in Large Animals Mastitis in Large Animals and see Pseudocowpox in Cattle Pseudocowpox in Cattle The parapox virus of pseudocowpox (electron microscopy, low magnification of 20,000x) in a skin scraping from a clinically affected cow, visualized by mixing a heavy metal stain (phosphotungstic... read more 
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Merck & Co., Inc., Rahway, NJ, USA (known as MSD outside of the US and Canada) is dedicated to using the power of leading-edge science to save and improve lives around the world. The Merck Veterinary Manual was first published in 1955 as a service to the community. The legacy of this great resource continues as the Merck Veterinary Manual in the US and Canada and the MSD Vet Manual outside of North America.
