A boy scout troop goes camping in a New England forest area in the late spring.
ID: 83070 • Letter: A
Question
A boy scout troop goes camping in a New England forest area in the late spring. Two weeks later, several of the scouts present with erythema migrans lesions but no other clinical manifestations. Borrelia burgdorferi, the causative agent of Lyme disease, has been isolated from a variety of ticks such as Ixodes scapularis, Amblyomma, Dermacentor, and Ixodes pacificus. Which of the following statements most accurately describes Lyme disease? Which of the following statements most accurately describes Lyme disease? A. Dermacentor and Amblyomma are significant vectors of Borrelia burgdorferi to humans B. Dogs and cats are naturally immune to Lyme disease C. Ixodes scapularis and Ixodes dammini are different types of ticks D. Only a small percentage of people who get bitten by a tick develop Lyme disease E. White-tailed deer, an important reservoir for Ixodes scapularis, are dying because of Lyme disease.Explanation / Answer
Borrelia burgdorferi is the causative agent of lyme disease.Hard ticks of the genus Ixodes are the vectors, they must remain on host for at least 48 hours to spread the disease.
Ixodes scapularis is commonly known as the deer tick or blacklegged tick, is a hard-bodied tick from the Ixodidae family.Ixodes dammini is a species that is the vector of lyme disease.
A person can only get Lyme disease if a tick that is a carrier of the disease-causing microbe bites him or her. Blacklegged (deer) ticks are the most common type of ticks transmitting the Lyme disease bacterium from host to host. In most places, as many as 20% of Blacklegged tick nymphs and 50% of adult females are infected. If he or she is bitten by a tick,it is important to remove it right away, and then identify .Blacklegged ticks attached for less than 24 hrs are not likely to have transmitted any infection. This information indicates that only a small percentage of people who get bitten by a tick develop lyme disease.
options: C, D accurately describes lyme disease.
Note: Dermacentor and Amblyomma are the vectors of the pathogens causing Rocky mountain spotted fever.
Dogs and cats are not naturally immune to lyme disease.Any contact with the ticks blood can potentially transmit infection to dogs and cats
White-tailed deer are the principal host for the adult ticks, an important means of transport and tick abundance is closely linked to the abundance of these animals. White-tailed deer are not considered competent reservoirs for Lyme disease. There is no such evidence that they are dying because of lyme disease.
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