Bartonella Nosode 2 dram Bartonella are bacteria that live primarily inside the lining of the blood vessels. They can infect humans, mammals and a wide range of wild animals. The disease that results is called bartonellosis. Bartonella henselae causes an important emerging infection that was first reported in 1990. It is mainly carried by cats and causes cat-scratch disease, endocarditis, and several other serious diseases in humans. Bartonella bacteria are known to be carried by fleas, body lice and ticks, and there’s high suspicion that ticks transmit it to humans. People with tick bites and no known exposure to cats have acquired the disease. People who recall being bitten by ticks have been co-infected with the Lyme spirochete and bartonella.