1 You only have head lice if you can find a living, moving louse (not a nit) on the scalp. 2  Anybody can get head lice. 3  Head lice infections are caught from close family and friends in the home and community, not from the school. 4  Spread of head lice requires direct head to head contact.
Leptospirosis, also called Weil's disease, is a bacteria that many rats carry without showing symptoms of infection. Humans become infected when contaminated rat urine or feces comes in contact with mucous membranes.hile they can carry and spread the disease, fleas on the rat are more often to blame. Fleas spread plague between animals and from animals to humans. Rats will die if they become infected with plague. Humans can also die without treatment, but antibiotics can are usually effective.
It is usually caused by the bite of a flea that has fed on an infected wild animal, such as a rat, chipmunk or prairie dog. It usually causes large sores and abscesses in the lymph nodes under the arms and legs. Dogs, and especially cats, can also become infected and can spread the disease to their human companions.iseases from rodents, pocket pets and rabbits. There are disease concerns with both wild (rats, mice) and pet (rats, mice, hamsters, gerbils, guinea pigs) rodents and rabbits. They can carry many diseases including hantavirus, leptospirosis, lymphocytic choriomeningitis (LCMV), Tularemia and Salmonella.