MSD and the MSD Veterinary Manual. Merck & Co., Inc., Kenilworth, NJ, USA (known as MSD outside of the US and Canada) is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world. The suggested treatment with doxycycline has been 5 to 10mg per day per Kg. (according to the Merck Manual.) Some dogs have been treated at a rate of 20 mg per kg body weight per day (or 200 mg for the typical 22 pound dog, divided into two daily doses given 12 hours apart) with excellent results. MSD and the MSD Veterinary Manual. Merck & Co., Inc., Kenilworth, NJ, USA (known as MSD outside of the US and Canada) is a global healthcare leader working to help the world be well. From developing new therapies that treat and prevent disease to helping people in need, we are committed to improving health and well-being around the world. The diagnosis is further complicated by the fact that dogs infected with Ehrlichia may also be infected with other diseases carried by ticks, such as Babesia, Lyme disease, or Rocky Mountain Spotted Fever.Infection with a bacteria called Bartonella has also been found in conjunction with ehrlichiosis and other tick-borne diseases. Below is a quick reference guide to ticks most commonly found on companion animals and the pathogens which they can transmit. **It's important to note that pathogen infection prevalence of ticks can vary significantly by geographic area, so the information provided below does not imply that those pathogen are present in all areas with those tick populations. ehrlichiosis) in people, canine granulocytic anaplasmosis (previously canine granulocytic ehrlichiosis) in dogs, equine granulocytic anaplasmosis (formerly equine granulocytic ehrlichiosis) in horses, and tick-borne fever in ruminants. A. phagocytophilum is a very heterogeneous organism, and genetic vari