Which disease is NOT transmitted by brown dog ticks?

Brown dog ticks are known to transmit various diseases that affect dogs and can occasionally impact humans. Canine ehrlichiosis and canine babesiosis are both directly transmitted by brown dog ticks. These diseases are caused by specific pathogens that brown dog ticks can carry and pass on during feeding.

Lyme disease, on the other hand, is primarily transmitted by the black-legged tick, also known as the deer tick. This tick carries the bacterium Borrelia burgdorferi, which is responsible for Lyme disease. Since brown dog ticks do not play a role in the transmission of this particular disease, it distinguishes Lyme disease from the others that brown dog ticks can transmit.

Rocky Mountain spotted fever is another disease carried by different species of ticks, particularly the American dog tick and the wood tick, but not by the brown dog tick itself. Thus, when identifying diseases not transmitted by brown dog ticks, Lyme disease stands out clearly.