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Petting zoos could potentially transmit highly virulent drug-resistant bacteria to visitors. New research shows that petting zoos can create a diverse reservoir of multidrug-resistant (MDR) bacteria, which could lead to highly virulent drug-resistant pathogens being passed on to visitors. Source 2o.
With how potential sanitary conditions can affect animals easily, so can humans as well when a disease gets transmitted. I don't understand why some people don't take the time to at least wash their hands when touching and not touching the animals in the first place.