All of the following statement about plague are wrong except -

-plaque is primarily a zoonoses caused by Yersenia pestis. The causative bacillus can survive and multiply in the soil of the rodent burrow. - the reservoir of plaque is wild rodents, filed mice gerbils and skunks. - in India, the wild rodent Tatera indica is the main reservoir. - Bubonic plague is the most common variety in man. - Incubation period for pneumonic plaque is one to three days Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:293,295 <\p>