1-10. LUMEN FLAGELLATES
The lumen flagellates pathogenic to men are: Giardia lamblia, Thrichomonas
vaginalis, and Trichomonas hominis.
ORGANISM 1 -- Giardia lamblia
GENERAL CHARACTERISTICS
COMMON NAME: None.
GEOGRAPHICAL DISTRIBUTION: Cosmopolitan; pocket of endemic behavier in
Colorado.
PATHOGENESIS: Giardiasis.
SEROLOGICAL DIAGONSIS: Agglutination test, fluorescent antibody, enzyme linked-
immunosorbant assay (ELISA).
HABITAT: Small intestines.
INTERMEDIATE HOST: None.
RESERVOIR HOST: None.
INFECTED FORM: Mature, quadrinucleated cyst.
MODE OF INFECTION: Ingestion.
LABORATORY IDENTIFICATION:
SPECIMEN SOURCE: Feces, dukodenal aspirates.
Figure 1-21. Life cycle of Giardia lamblia.
MD0842
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