Wednesday, 16 November 2016

Long-Lost Tropical Bed Bugs Are Back in the US

By Jen Viegas, Seeker | November 11, 2016 12:27pm ET

After a suspected 60-year absence from the U.S., a bed bug known for its ability to spread rapidly has just invaded Florida and Hawaii, according to experts who study the parasitic pest.

The tropical bed bug Cimex hemipterus is raising concern because traditional eradication methods might not keep its numbers in check.

"To the naked eye, the common bed bug (Cimex lectularius) and the tropical bed bug would look the same, as would signs of their presence: bites, blood spots on linens and shed skin from the bugs," University of Florida entomologist Brittany Campbell told Seeker. She added that the parasites can cause everything from small bite marks to serious allergic reactions that require immediate medical attention.

"Under a microscope, the two species look different," continued Campbell, who recently authored a report on tropical bed bugs for Entomology Today. "The tropical bed bug has a different-shaped pronotum, or neck-like structure, that doesn't have the 'U-shape' characteristic of common bed bugs."

The bed bug's existence in Hawaii is anecdotal, she said, but more is known about its presence in Florida, thanks to an observant homeowner from Merritt Island near the Ulumay Wildlife Sanctuary in Brevard County, Fla. In 2015 the family reported an infestation, and a sample was sent to Campbell. She and her team discovered the bed bug was from the long-lost tropical species.

From the late 1930s to the early 1940s, the bug was found in several Florida counties. But it hadn't been reported again until the Merritt Island incident. As its name suggest, it's often found in tropical environments including Africa, parts of Australia, Asia and South America.

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