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ProtozoaProtozoa
 IntestinalIntestinal E. histolyticaE. histolytica
G. lambliaG. lamblia
CryptosporidiumCryptosporidium
 Urogenital TractUrogenital Tract Trichomonas vaginalisTrichomonas vaginalis
 Blood and TissueBlood and Tissue PlasmodiumPlasmodium
ToxoplasmaToxoplasma
TrypanosomaTrypanosoma
Giardia lambliaGiardia lamblia
Antony van LeeuonhockAntony van Leeuonhock
Vilem LamblVilem Lambl
Historical BackgroundHistorical Background
 Giardia intestinalis was first observed by AntonyGiardia intestinalis was first observed by Antony
van Leeuwenhoek (1681) – A Dutch tradesmanvan Leeuwenhoek (1681) – A Dutch tradesman
in his own stool - and he described them asin his own stool - and he described them as
animalculesanimalcules
 He is also called the “father of Microbiology”He is also called the “father of Microbiology”
 In 1859 a physician named Vilem LamblIn 1859 a physician named Vilem Lambl
observed G. intestinalis in stool of children withobserved G. intestinalis in stool of children with
diarrhoeadiarrhoea
Giardia lambliaGiardia lamblia
Synonymus with:Synonymus with:
 Lamblia intestinalisLamblia intestinalis
 Giardia doudenlisGiardia doudenlis
Giardia lambliaGiardia lamblia
 Is a flagellated protozoan parasite that colonizes andIs a flagellated protozoan parasite that colonizes and
reproduces in the small intestines causing Giardiasis.reproduces in the small intestines causing Giardiasis.
 The Giardia parasite attaches to the epithelium by aThe Giardia parasite attaches to the epithelium by a
ventral adhesive disc.ventral adhesive disc.
 Reproduces via Binary fission.Reproduces via Binary fission.
 Does not spread via bloodstream nor does it spread toDoes not spread via bloodstream nor does it spread to
other parts of the Gastrintestinal tract, but remainsother parts of the Gastrintestinal tract, but remains
confined to the lumen of the small intestines.confined to the lumen of the small intestines.
Giardia lamblia
Giardia lamblia
Giardia lambliaGiardia lamblia
 Trophozoites absorb their nutrient from theTrophozoites absorb their nutrient from the
lumen of the small intestines and are anaerobes.lumen of the small intestines and are anaerobes.
 If the organism is split and stained, it has a veryIf the organism is split and stained, it has a very
characteristic pattern that resembles a familiarcharacteristic pattern that resembles a familiar
“Smiley face”symbol“Smiley face”symbol
Giardia lamblia
CystsCysts
 Are not killed by chlorinationAre not killed by chlorination
 Killed or removed by Boiling, Iodine treatmentKilled or removed by Boiling, Iodine treatment
or Filtrationor Filtration
 One cyst gives rise to two trophoizoites (oneOne cyst gives rise to two trophoizoites (one
amebic cyst produces eight trophoites).amebic cyst produces eight trophoites).
Giardia lamblaGiardia lambla
 Affects humans but is also one of the mostAffects humans but is also one of the most
common parasites infecting Cats, Dogs andcommon parasites infecting Cats, Dogs and
birds.birds.
 The mammalian hosts include:The mammalian hosts include:
 CowsCows
 Beavers (also called Beaver fever)Beavers (also called Beaver fever)
 Deer &Deer &
 SheepSheep
Life CycleLife Cycle
 Ingestion of dormant cysts in contaminatedIngestion of dormant cysts in contaminated
water, food or by the faecal – oral routewater, food or by the faecal – oral route
(through poor hygiene practices)(through poor hygiene practices)
 Cyst Trophozoite CystCyst Trophozoite Cyst
Lab DiagnosisLab Diagnosis
 Trophozoites or Cysts in diarrhoeal stoolTrophozoites or Cysts in diarrhoeal stool
 In formed stool only Cysts are seenIn formed stool only Cysts are seen
 Antigen Detection in stool by ELISAAntigen Detection in stool by ELISA
 String TestString Test
 No Serlogical Test availableNo Serlogical Test available
Giardia lamblia
TreatmentTreatment
 MetronidazoleMetronidazole
 TinidazoleTinidazole
Trichomas VaginalisTrichomas Vaginalis
 A protozoan parasite that exists only in theA protozoan parasite that exists only in the
Trophozoite form i.e. there is NO cyst formTrophozoite form i.e. there is NO cyst form
 Pear ShapedPear Shaped
 Motile and the motility is called Jerky. WobblingMotile and the motility is called Jerky. Wobbling
or Rotating motionor Rotating motion
Giardia lamblia
Giardia lamblia
 Trichomonas vaginalis:Trichomonas vaginalis:
trophozoites are oval introphozoites are oval in
shape, 10-23 µm in length,shape, 10-23 µm in length,
with four anterior flagellawith four anterior flagella
of equal length and a fifthof equal length and a fifth
flagellumflagellum
on the margin of the shorton the margin of the short
undulating membrane.undulating membrane.
 Trichomonas vaginalis:Trichomonas vaginalis: thethe
infection is usuallyinfection is usually
acquiredacquired
by venereal contacts.by venereal contacts.
The male is the mostThe male is the most
important transmitter ofimportant transmitter of
the infection.the infection.
 Trichomonas vaginalisTrichomonas vaginalis::
T.vaginalisT.vaginalis is responsibleis responsible
forfor vaginitis and urethralvaginitis and urethral
discharge.discharge.
Symptomatic infection isSymptomatic infection is
more common in womenmore common in women
during the reproductiveduring the reproductive
period.period.
TRICHOMONASTRICHOMONAS VAGINALISVAGINALIS
 DiagnosisDiagnosis is usuallyis usually
obtained byobtained by
microscopicmicroscopic
examination of urine,examination of urine,
vaginal or urethralvaginal or urethral
discharge or swabs ofdischarge or swabs of
prostatic secretions.prostatic secretions.
 CultureCulture is possible onis possible on
different media:different media:
cysteine-peptone-liver-cysteine-peptone-liver-
maltosemaltose
and trypticase-yeastand trypticase-yeast
extract-maltose media.extract-maltose media.

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Giardia lamblia

  • 1. ProtozoaProtozoa  IntestinalIntestinal E. histolyticaE. histolytica G. lambliaG. lamblia CryptosporidiumCryptosporidium  Urogenital TractUrogenital Tract Trichomonas vaginalisTrichomonas vaginalis  Blood and TissueBlood and Tissue PlasmodiumPlasmodium ToxoplasmaToxoplasma TrypanosomaTrypanosoma
  • 5. Historical BackgroundHistorical Background  Giardia intestinalis was first observed by AntonyGiardia intestinalis was first observed by Antony van Leeuwenhoek (1681) – A Dutch tradesmanvan Leeuwenhoek (1681) – A Dutch tradesman in his own stool - and he described them asin his own stool - and he described them as animalculesanimalcules  He is also called the “father of Microbiology”He is also called the “father of Microbiology”  In 1859 a physician named Vilem LamblIn 1859 a physician named Vilem Lambl observed G. intestinalis in stool of children withobserved G. intestinalis in stool of children with diarrhoeadiarrhoea
  • 6. Giardia lambliaGiardia lamblia Synonymus with:Synonymus with:  Lamblia intestinalisLamblia intestinalis  Giardia doudenlisGiardia doudenlis
  • 7. Giardia lambliaGiardia lamblia  Is a flagellated protozoan parasite that colonizes andIs a flagellated protozoan parasite that colonizes and reproduces in the small intestines causing Giardiasis.reproduces in the small intestines causing Giardiasis.  The Giardia parasite attaches to the epithelium by aThe Giardia parasite attaches to the epithelium by a ventral adhesive disc.ventral adhesive disc.  Reproduces via Binary fission.Reproduces via Binary fission.  Does not spread via bloodstream nor does it spread toDoes not spread via bloodstream nor does it spread to other parts of the Gastrintestinal tract, but remainsother parts of the Gastrintestinal tract, but remains confined to the lumen of the small intestines.confined to the lumen of the small intestines.
  • 10. Giardia lambliaGiardia lamblia  Trophozoites absorb their nutrient from theTrophozoites absorb their nutrient from the lumen of the small intestines and are anaerobes.lumen of the small intestines and are anaerobes.  If the organism is split and stained, it has a veryIf the organism is split and stained, it has a very characteristic pattern that resembles a familiarcharacteristic pattern that resembles a familiar “Smiley face”symbol“Smiley face”symbol
  • 12. CystsCysts  Are not killed by chlorinationAre not killed by chlorination  Killed or removed by Boiling, Iodine treatmentKilled or removed by Boiling, Iodine treatment or Filtrationor Filtration  One cyst gives rise to two trophoizoites (oneOne cyst gives rise to two trophoizoites (one amebic cyst produces eight trophoites).amebic cyst produces eight trophoites).
  • 13. Giardia lamblaGiardia lambla  Affects humans but is also one of the mostAffects humans but is also one of the most common parasites infecting Cats, Dogs andcommon parasites infecting Cats, Dogs and birds.birds.  The mammalian hosts include:The mammalian hosts include:  CowsCows  Beavers (also called Beaver fever)Beavers (also called Beaver fever)  Deer &Deer &  SheepSheep
  • 14. Life CycleLife Cycle  Ingestion of dormant cysts in contaminatedIngestion of dormant cysts in contaminated water, food or by the faecal – oral routewater, food or by the faecal – oral route (through poor hygiene practices)(through poor hygiene practices)  Cyst Trophozoite CystCyst Trophozoite Cyst
  • 15. Lab DiagnosisLab Diagnosis  Trophozoites or Cysts in diarrhoeal stoolTrophozoites or Cysts in diarrhoeal stool  In formed stool only Cysts are seenIn formed stool only Cysts are seen  Antigen Detection in stool by ELISAAntigen Detection in stool by ELISA  String TestString Test  No Serlogical Test availableNo Serlogical Test available
  • 18. Trichomas VaginalisTrichomas Vaginalis  A protozoan parasite that exists only in theA protozoan parasite that exists only in the Trophozoite form i.e. there is NO cyst formTrophozoite form i.e. there is NO cyst form  Pear ShapedPear Shaped  Motile and the motility is called Jerky. WobblingMotile and the motility is called Jerky. Wobbling or Rotating motionor Rotating motion
  • 21.  Trichomonas vaginalis:Trichomonas vaginalis: trophozoites are oval introphozoites are oval in shape, 10-23 µm in length,shape, 10-23 µm in length, with four anterior flagellawith four anterior flagella of equal length and a fifthof equal length and a fifth flagellumflagellum on the margin of the shorton the margin of the short undulating membrane.undulating membrane.
  • 22.  Trichomonas vaginalis:Trichomonas vaginalis: thethe infection is usuallyinfection is usually acquiredacquired by venereal contacts.by venereal contacts. The male is the mostThe male is the most important transmitter ofimportant transmitter of the infection.the infection.  Trichomonas vaginalisTrichomonas vaginalis:: T.vaginalisT.vaginalis is responsibleis responsible forfor vaginitis and urethralvaginitis and urethral discharge.discharge. Symptomatic infection isSymptomatic infection is more common in womenmore common in women during the reproductiveduring the reproductive period.period.
  • 23. TRICHOMONASTRICHOMONAS VAGINALISVAGINALIS  DiagnosisDiagnosis is usuallyis usually obtained byobtained by microscopicmicroscopic examination of urine,examination of urine, vaginal or urethralvaginal or urethral discharge or swabs ofdischarge or swabs of prostatic secretions.prostatic secretions.  CultureCulture is possible onis possible on different media:different media: cysteine-peptone-liver-cysteine-peptone-liver- maltosemaltose and trypticase-yeastand trypticase-yeast extract-maltose media.extract-maltose media.