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Is mycoplasma contagious? Will my healthy dog get it from my rescue?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | 22 lbs

We recently adopted a 2 yr old rescue 7 days ago, within the first 24 hours we took him to the ER for a cough. 3 days later his culture came back and he has mycoplasma. We started him on antibiotics right away. My other dog is 5 years old and in generally good health. My concern is how likely is it that my older dog will get mycoplasma now? Our house is not very big and the two dogs have had interaction this week. Is this a 100% chance he'll get it or are there other factors why maybe he wont?

1 Answer

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on April 27th, 2018

Good question! What I tend to see in practice is that these rescue dogs are very stressed from previous poor nutrition, being in a shelter, and then usually surgery. Their immune system is weak and they get any infection they are exposed to. The existing family dogs are usually well fed and healthy. Some do get these infections, but many are able to fight them off and either never get sick or only have very mild signs. Of course I would be vigilant about monitoring for any signs but I would also be optimistic that he could remain healthy! Best of luck and thank you for using Pet Coach.

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