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.
Cat Scratch Disease in Children. Cat scratch disease is an illness that can occur after being bitten or scratched by a cat. It is caused when the Bartonella henselae bacteria carried by cats gets under the skin in a human. Cats, and especially kittens, become infected with the cat scratch bacteria from fleas. But, fleas probably do not spread the bacteria to humans. Cats that are carrying the bacteria don't get sick and don't need to be treated. Cat scratch disease often goes away on its own in 2 to 4 months.