FLAGELLATES

• Originally classified as a yeast

  Blastocystis hominis
• no cell wall but a mitochondrion with protoozoan morphology

  Blastocystis hominis
• Blastocystis hominis MOT

  Fecal – oral route
• Inhabitant of the lower intestinal tract

  Blastocystis hominis
• WHIP – LIKE LOCOMOTOR ORGANS

  FLAGELLATES
• Giardia lamblia MOT

  consumption of water contaminated with infective stage
• Giardia lamblia infective stage:

  CYSTS
• OVOID, QUADRINUCLEATED

  Giardia lamblia cyst
• Pear-shaped, “Old man’s face”

  Giardia lamblia TROPHOZOITE
• G. lamblia motility

  FALLING LEAF
• (VSP)

  variant specific surface protein
• Gay Bowel Syndrome

  Giardiasis
• G. lamblia was discovered in 1681 by

  Anton van Leeuwenhoek
• G. lamblia SEROLOGICAL TES

  CIE (countercurrent immunoelectrophoresis), IF (immunofluorescence), ELISA
• CHILOMASTIX MESNILII TROPHOZOITE


  CURVED CYTOSOMAL FIBRIL
• lemon shaped or nipple shaped cyst

  CHILOMASTIX MESNILII
• corkscrew motility


  CHILOMASTIX MESNILII
• Dientamoeba fragilis habitat

  Mucosal crypts of the colon
• no cyst form

  Dientamoeba fragilis
• 5 flagella

  T. vaginalis
• T. vaginalis survival

  24 hours urine and semen, 1-2 hours fomites w moist surface
• T. vaginalis SEXUALLY TRANSMITTED INFECTION FEMALE

  VAGINITIS, ITCHINESS ( BURNING SENSATION), STRAWBERRY CERVIX
• Trichomonas hominis MOT

  Ingestion of trophozoites
• T. hominis habitat


  HABITAT: Large intestine,
• tenax


  latin for tenacious
• smallest Trichomonas

  Trichomonas tenax
• T. tenax

  MOTDirect contact of mucous membranes.
• ciliates

  Balantidium coli