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  2. Diagnosis of HIV/AIDS - Wikipedia

    en.wikipedia.org/wiki/Diagnosis_of_HIV/AIDS

    Declining CD4 T-cell counts are considered to be a marker of progression of HIV infection. A normal CD4 count can range from 500 cells/mm3 to 1000 cells/mm3. In HIV-positive people, AIDS is officially diagnosed when the count drops below 200 cells/μL or when certain opportunistic infections occur. This use of a CD4 count as an AIDS criterion ...

  3. Laboratory diagnosis of viral infections - Wikipedia

    en.wikipedia.org/wiki/Laboratory_diagnosis_of...

    Some viruses attach to molecules present on the surface of red blood cells, for example, influenza virus. [10] A consequence of this is that – at certain concentrations – a viral suspension may bind together (agglutinate) the red blood cells thus preventing them from settling out of suspension. [citation needed]

  4. Urine test strip - Wikipedia

    en.wikipedia.org/wiki/Urine_test_strip

    The normal number of red blood cells in urine should not usually exceed 3 per high power field. [13] A urine test strip showing positive for blood can also indicate hemoglobinuria, which is not detectable using a microscope due to the lysis of red blood cells in the urinary tract (particularly in alkaline or dilute urine), or intravascular ...

  5. HIV/AIDS - Wikipedia

    en.wikipedia.org/wiki/HIV/AIDS

    The second-most frequent mode of HIV transmission is via blood and blood products. [18] Blood-borne transmission can be through needle-sharing during intravenous drug use, needle-stick injury, transfusion of contaminated blood or blood product, or medical injections with unsterilized equipment.

  6. Live blood analysis - Wikipedia

    en.wikipedia.org/wiki/Live_blood_analysis

    Rouleaux of red blood cells under the microscope is an artifact which occurs when the blood sample at the edge of the coverslip [15] starts to dry out; where a large number of red blood cells clump together; or when the blood starts to clot when contacted with the glass. These artifacts are observed in only small, selected areas on the slide ...

  7. BK virus - Wikipedia

    en.wikipedia.org/wiki/BK_virus

    BK virus has a wide spectrum of tissue and cell type tropism. The virus is detected in urinary tract system, salivary gland cells, peripheral blood leukocytes, pancreatic cells, vascular endothelial cells. [18] BKV has been identified in upper respiratory tract and tonsils as well as in fetus cells. [13]

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