spacer
  Home | About CDC | Press Room | Funding | A-Z Index | Centers, Institute & Offices | Training & Employment | Contact Us
spacer
spacer CDC Centers for Disease Control and Prevention Home Page spacer
CDC en Español
spacer
Search:  
spacer
Health & Safety Topics Publications & Products Data & Statistics Conferences & Events
spacer
spacer
spacer
Public Health Image Library (PHIL)   Photographs, Illustrations, Multimedia Files
spacer
Skip Nav spacer
Back to results

11736

PHIL Image 11736

ID#:11736
Description:This digitally-colorized scanning electron micrograph (SEM) revealed some of the ultrastructural morphology displayed on the head region of a bedbug, Cimex lectularius. Of interest is one of the insect’s compound eyes.

The compound eye is given this name due to the fact that the single large eye is really made up of many repeating units known as "ommatidia”. Each ommatidium is composed of separate units made up of a photoreceptor cell, support cell, and pigment cells. Though each of these visual mechanisms functions as a separate organ, together they provide the organism with a "compound” picture of its environment. Due to what is referred to as the "flicker effect”, the compound eye is made very sensitive to movement, with each ommatidium turning on and off, as objects pass across its field of view. The bilateral anatomical placement of the insect's eyes provides the organism with a very wide range of visual sensitivity.

Bedbugs are not vectors in nature of any known human disease. Although some disease organisms have been recovered from bedbugs under laboratory conditions, none have been shown to be transmitted by bedbugs outside of the laboratory.

The common bedbug, C. lectularius is a wingless, red-brown, blood-sucking insect that grows up to 7mm in length, and has a lifespan from 4 months up to 1 year. Bedbugs 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 injects 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 bedbug time to escape into cracks and crevices. In some cases, the itchy bites can develop into painful welts that last several days.

High Resolution:Right click here and select "Save Target As..." for hi-resolution image (16.43 MB)
Content Providers(s):CDC/ Janice Haney Carr
Creation Date:2009
Photo Credit:Janice Haney Carr
Links:
  • CDC – Div. of Parasitic Diseases (DPDx); Bed Bugs, Cimex lectularius
  • CDC – Hwang SW, Svoboda TJ, De Jong IJ, Kabasele KJ, Gogosis E., “Bed Bug Infestations in an Urban Environment”, Emerg Infect Dis, 2005 Apr
    Categories:
    CDC Organization

    MeSH
    tree picture Organisms
    tree picture tree picture Animals
    tree picturetree picture tree picture Invertebrates
    tree picturetree picturetree picture tree picture Arthropods
    tree picturetree picturetree picturetree picture tree picture Insects
    tree picturetree picturetree picturetree picturetree picture tree picture Hemiptera
    tree picturetree picturetree picturetree picturetree picturetree picture tree picture Heteroptera
    tree picturetree picturetree picturetree picturetree picturetree picturetree picture tree picture Cimicidae
    tree picturetree picturetree picturetree picturetree picturetree picturetree picturetree picture tree picture Bedbugs
    Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.
     Add to My Pictures

    Back to results


    This page last reviewed: Mar. 18 2005
    spacer
    spacer
    spacer
    spacer
      Home | Policies and Regulations | Disclaimer | FOIA | Contact Us
    spacer
    spacer
    spacer Safer, Healthier People
    spacer
    Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
    Tel: (404) 639-3311 / Public Inquiries: (404) 639-3534 / (800) 311-3435
    spacer USA.gov: The U.S. Government's Official Web PortalDHHS Department of Health
    and Human Services