The mean DO level for adult salmonids is 6.5 mg/L, and the minimum is 4 mg/L Â¹Â². These fish generally attempt to avoid areas where dissolved oxygen is less than 5 mg/L and will begin to die if exposed to DO levels less than 3 mg/L for more than a couple days Â¹â¹.n a stable body of water with no stratification, dissolved oxygen will remain at 100% air saturation. 100% air saturation means that the water is holding as many dissolved gas molecules as it can in equilibrium.
Animals (Zoonotic). Pets can carry parasites and pass parasites to people. Proper handwashing can greatly reduce risk. A zoonotic disease is a disease that can be passed between animals and humans. Zoonotic diseases can be caused by viruses, bacteria, parasites, and fungi.Some of these diseases are very common.For zoonotic diseases that are caused by parasites, the types of symptoms and signs can be different depending on the parasite and the person.oonotic diseases can be caused by viruses, bacteria, parasites, and fungi. Some of these diseases are very common. For zoonotic diseases that are caused by parasites, the types of symptoms and signs can be different depending on the parasite and the person.
We hear about Rabies, Ringworm, and Lyme disease, but many other diseases pose a threat to humans. 1  Plague: Rodents, cats, rabbits, squirrels, related animals. 2  Tuberculosis: Caused by a bacterium called Mycobacterium tuberculosis. 3  Cat Scratch Fever: Caused by a bacterium called Bartonella henselae.