BSIP RM batch 12 September 2013
EN_01107858_0080
This 2006 photograph depicted an anterosuperior view, i.e., from the front and above, of an adult bed bug, Cimex lectularius, as it was in the process of ingesting a blood meal from the arm of a ?voluntary? human host. Bed bugs are not vectors in nature of any known human disease. Although some disease organisms have been recovered from bed bugs under laboratory conditions, none have been shown to be transmitted by bed bugs outside of the laboratory. The common bed bug C. lectularius is a wingless, red-brown, blood-sucking insect that grows up to 7 mm in length and has a lifespan from 4 months up to 1 year. Bed bugs hide in cracks and crevices in beds, wooden furniture, floors, and walls during the daytime and emerge at night to feed on their preferred host, humans. C. lectularius inject saliva into the blood stream of their host to thin the blood, and to prevent coagulation. It is this saliva that causes the intense itching and welts. The delay in the onset of itching gives the feeding bed bug time to escape into cracks and crevices. In some cases, the itchy bites can develop into painful welts that last several days. Bed bug bites are difficult to diagnose due to the variability in bite response between people, and due to the change in skin reaction for the same person over time. It is best to collect and identify bed bugs to confirm bites. Bed bugs are responsible for loss of sleep, discomfort, disfiguring from numerous bites and occasionally bites may become infected.
2013-08-19
CDC / BSIP/EAST NEWS
BSIP
CDC / BSIP
Bsip_013586_009
0,33MB
11cm x 13cm przy 300dpi
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