11.   Berger has also transmitted the disease to healthy frogs exposed in water to skin scrapings from infected frogs.

12.   Besides biting and causing itching, mosquitoes occasionally transmit diseases, such as encephalitis.

13.   Because new AIDS drugs are saving lives, there are more people in San Francisco living with AIDS who have the potential to transmit disease.

14.   A positive test for tuberculosis does not mean the disease can be transmitted to another person or animal.

15.   But he said that if the disease can be transmitted to humans, the amount needed for infection cannot be estimated.

16.   But officials of the Montana Department of Livestock say they have to shoot the straying buffalo because they might transmit a disease to cattle.

17.   But the disease is not transmitted by air currents.

18.   But the vast majority do not transmit disease.

19.   Carried mostly by farm animals, the anthrax disease is naturally transmitted by contact with animal hides through a break in the skin.

20.   Doctors have long known how the disease is transmitted and cured in humans.