8 doctors weighed in:
Can all fleas potentially carry the plague bacteria?
8 doctors weighed in

Dr. Pamela Pappas
Psychiatry
4 doctors agree
In brief: No
Only fleas which have been exposed to rats or other animals infected with the plague bacteria (Yersinia pestis) can transmit it to humans.
Y. pestis colonizes the flea's gut, replicates, and blocks the flea's gut. The fleas then feed voraciously, regurgitating the bacteria into the bite. Only a few organisms are required to pass on the infection. Most cases have been in in CA, AZ, NM, & CO.

In brief: No
Only fleas which have been exposed to rats or other animals infected with the plague bacteria (Yersinia pestis) can transmit it to humans.
Y. pestis colonizes the flea's gut, replicates, and blocks the flea's gut. The fleas then feed voraciously, regurgitating the bacteria into the bite. Only a few organisms are required to pass on the infection. Most cases have been in in CA, AZ, NM, & CO.
Dr. Pamela Pappas
Dr. Pamela Pappas
Thank
Dr. Robert Kwok
Pediatrics
2 doctors agree
In brief: Probably yes
Rats, prairie dogs, chipmunks, squirrels, deer mice, etc.
.., and the fleas of all these animals can carry the plague. Other animals, such as rabbits, also can have the plague. After pet cats and dogs catch the plague, their fleas can become infected and transmit the bacteria also.

In brief: Probably yes
Rats, prairie dogs, chipmunks, squirrels, deer mice, etc.
.., and the fleas of all these animals can carry the plague. Other animals, such as rabbits, also can have the plague. After pet cats and dogs catch the plague, their fleas can become infected and transmit the bacteria also.
Dr. Robert Kwok
Dr. Robert Kwok
Thank
1 comment
Dr. Pamela Pappas
I read the question differently from you, since not all fleas have been exposed to Yersinia pestis. So some fleas could not transmit the illness.
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