Bedbug biology lesson.

Research teams locate dozens of genes that help bedbugs thrive despite efforts to eradicate them.

Wall Street Journal staffer Robert Lee Hotz delves into the evolutionary microbiology of the species known as Cimex lectularius, which has plagued human resting places for so many centuries that today they survive solely on human blood. Hotz writes about bedbugs adaptive capacity, which is scary:

Underscoring the speed of adaptation, an independent team of researchers from New Mexico State University and Virginia Polytechnic Institute reported last week that newer pesticides based on neonicotinoids are already losing their effectiveness against bedbugs because the insects have built up a tolerance to them.

And, yes, something you had to be thinking yourself:

Bedbugs in Brooklyn, it seems, are slightly different genetically than bedbugs in Queens. In fact, every district appears to have a signature breed.

Says one bedbug to another, "you are who you bite."

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