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        DPDx - Laboratory Identification of Parasites of Public Health Concern
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        Case #292 – February, 2011
          Case #292 – February, 2011
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                Upon returning from a week-long business trip to Las Vegas, a 35-year-old man found what appeared to be insects among various articles of clothing. Due to the recent heightened awareness of bed bugs in hotels, he decided to bring the insects to the local extension office for identification help. The specimens, which measured on average 2 mm in length, were cleared and mounted in balsam for identification by the state entomologist. Figures A and B show two of the specimens. What is your diagnosis? Based on what criteria?
                    Figure A
                    Figure B
                  Case Answer
                        The organisms shown in this case were the pubic louse, Pthirus pubis. Diagnostic morphologic features included:
                          * a size range compatible with P. pubis.
                          * the presence of six legs ending with tarsi adapted for gripping hair shafts.
                          * the presence of antennae, which ruled-out ticks and mites.
                        The specimen in Figure B was a gravid female, as an egg could be seen within her body (arrow, Figure B).
                        Figure B
                        More on: Pthiriasis
                Images presented in the DPDx case studies are from specimens submitted for diagnosis or archiving. On rare occasions, clinical histories given may be partly fictitious.
      DPDx is an educational resource designed for health professionals and laboratory scientists. For an overview including prevention, control, and treatment visit www.cdc.gov/parasites/.
      Last Reviewed: August 24, 2016
        Source: National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Division of Parasitic Diseases and Malaria
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              o Tissue specimens for free-living amebae(FLA)
              o Isolation of Leishmania organisms
              o Sputum
              o Aspirates
              o Sputum, induced sputum, and bronchoalveolar avage (BAL)
              o Vaginal swabs for diagnosis
              o Procedure for demonstration of pinworm eggs
              o Urine
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