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Balantidium coli, Giardia lamblia , and trichomonas .

Balantidium coli, Giardia lamblia , and trichomonas . Continue in protozoa. Balantidium coli:. It’s uncommon parasite of humans. It commonly infects pigs and has a worldwide distribution. Two stages can be seen:

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Balantidium coli, Giardia lamblia , and trichomonas .

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  1. Balantidium coli, Giardialamblia, and trichomonas. Continue in protozoa

  2. Balantidium coli: • It’s uncommon parasite of humans. • It commonly infects pigs and has a worldwide distribution. • Two stages can be seen: • The trophozoite: large, easily seen oval shaped ciliate with a rapid revolving motility. • The cyst is : large, round, thick walled, it’s the infective stage. Cilia is common but not clearly seen in cyst.

  3. Macronucleus stains well with iodine and other stains. • A large macronucleus may be seen “kidney shape”. A very small micronucleus lies close to the macronucleus but not clearly appear. • Habitat: Large intestine. • Disease: Balantidiasis with dysentery-abdominal pain, mucoid bloody diarrhea with tenesmus. • Complications: Intestinal: haemorrhage, appendicitis, peritonitis. • Extra intestinal: amoeba can migrate and infect other organs (liver, lung, skin, brain). • Diagnosis: stool examination.

  4. Balantidium coli: Cyst Trophozoite

  5. Cyst Trophozoite

  6. GiardiaLamblia: • In tropical and subtropical areas. • Seen in children more than adults. • Have 2 stages: cyst and trophozoite. • Cyst: oval in shape, with central Axostyle, and 2 nuclei. In direct method may seen without nuclei at 40X. • Trophozoite: pear shape, “monkey face” fragile stage not seen clearly during processing.

  7. Can cause autoinfection. • Infective sate is the cyst. • Habitat: small intestine. • Disease: Giardiasis: abdominal pain, diarrhea, gases and anorexia for 1-2 weeks. • Complications “chronic stage”: malabsorption of fat (steatorrhea) produce pale coloration of the stool. • Diagnosis: stool examination.

  8. Giardialamblia:

  9. Giardialamblia: Cyst Trophozoite

  10. Giardialamblia: Cyst Trophozoite

  11. Trichomonas: • Either trichomonasvaginalis or tichomonashominis. • No cystic form in trichomonas, there is trophozoite stage, and so it considered as the infective stage. • Trophozoite is ovoid or pear-shaped. • Has a short undulating membrane. • Has 4 anterior flagella and a fifth running along the outer margin of the undulating membrane. • Has a big vesicular nucleus.

  12. Habitat: in female vagina and cervix, in male urethra. • Diagnosis: in female: vaginal swab or secretions or urine. In male: prostatic secretions or urine. • To differentiate between trichomonasvaginalis and hominis this is by the specimen.

  13. Trichomonasvaginalis:

  14. Trichomonasvaginalis:

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