Although bed bugs can be infected with at least 28 human pathogens, no studies have found that the insects are capable of transmitting any of these to humans. They have been found with methicillin-resistant Staphylococcus aureus (MRSA) and with vancomycin-resistant Enterococcus faecium (VRE), but the significance of this is still unknown.
Investigations into potential transmission of HIV, MRSA, hepatitis B, hepatitis C, and hepatitis E have not shown that bed bugs can spread these diseases. However, there is some evidence that arboviruses may be transmissible.
Cimex lectularius goes through five immature life stages that each require a blood meal to develop and move on to the next stage. Blood meals are necessary for each life stage in order to reproduce. They tend to feed exclusively on humans. C. lectularius are obligate blood feeders. C. lectularius typically feed on hosts when they are asleep. Haematophagous insects can use body temperature, moisture, carbon dioxide and visual cues to locate a host. (Siljander) C. lectularius is found all over the world in almost every area that has been colonized by humans.
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