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. 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. Symptoms in people include headache, fever, vomiting, rash and muscle aches.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.
Rat Diseases in Humans. Most of these diseases are also transmissible by other members of the rodent family up to and including bubonic plague, which can also be found in squirrels, prairie dogs, and chipmunks.