Lepto

Leptospirosis (lepto) is a disease caused by a bacteria called Leptospira interrogans.

These bacteria can infect multiple species of mammals, including humans, dogs, rats, mice, raccoons, skunks, opossums, cows and pigs. Both animals and people may have a wide variety of symptoms, from no symptoms at all to liver and kidney damage and even death.

Leptospirosis is spread through the urine of infected animals. Animals and humans become infected when they come into direct contact with contaminated water or soil. The bacteria can survive in water and soil for weeks to months, so infection can occur without ever coming in contact with the infected animal.

Dogs are a major reservoir for zoonotic infections. Dogs transmit several viral and bacterial diseases to humans. Zoonotic diseases can be transmitted to human by infected saliva, aerosols, contaminated urine or feces and direct contact with the dog. Viral infections such as rabies and norovirus and bacterial infections including Pasteurella, Salmonella, Brucella, Yersinia enterocolitica, Campylobacter, Capnocytophaga, Bordetella bronchiseptica, Coxiella burnetii, Leptospira, Staphylococcus intermedius and Methicillin resistance staphylococcus aureus are the most common viral and bacterial zoonotic infections transmitted to humans by dogs.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5319273/

Dogs Could Be “Patient Zero” For Virus With Potential To Infect Humans
https://www.unmc.edu/healthsecurity/transmission/2023/04/25/dogs-could-be-patient-zero-for-virus-with-potential-to-infect-humans/

https://www.newsweek.com/dogs-could-patient-zero-virus-potential-infect-humans-1796654