How plague bacteria pull fleas
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Last Update: 2020-06-21
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Source: Internet
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Author: User
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A loss of an enzyme involved in urea decomposition may be the cause of the ability of plague bacteria to spread among fleas, a study has foundThe flea-borne plague bacteria Yersinia Pestis develops into a biofilm on a valve in the flea's digestive tract, inducing infected fleas to eat again by preventing them from ingesting blood food from human hostsconsidering that the intestinal pathogen pseudo-tuberculosis Yersinis, which was isolated from yerson bacteria less than 6,400 years ago, is toxic to flea and is spread through the dung-mouth pathway, Iman Chouikha and BJoseph Hinnebusch have explored how Yersian plague has adapted to a way of flea transmissionthe authors report that a urea enzyme of hydrolytic urea causes the oral toxicity of pseudo-tuberculosis Yersinite to fleas; Removing the gene from pseudo-tuberculosis Yersinis makes the bacteria non-toxic to fleas, while the rejuvenate urea enzyme D allelin gene that restores yersin syllaly syds makes the plague bacteria toxic to fleas, suggesting the key role the enzyme plays in its ability to spread among fleasthe authors say that because urea enzyme-induced mortality can kill more than one-third of infected flea vectors, the mutant gene may have been subjected to strong positive selection in the evolution of plague bacteria"text-align: center;"img src""alt"""how plague bacteria pull fleas" title""plague bacteria pull fleas" / Source: Microbial Technology Application
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