By ULY CLINIC

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Giardiasis

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Introduction

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Giardiasis is the infestation of the upper small intestine caused by the flagellate protozoan Giardia Lamblia (or G. intestinalis), cytopathic effects of which leads to malabsorption and diarrhea. It is more common in immune compromised individuals and is acquired through ingestion of contaminated water

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Diagnostic Criteria

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• Crampy abdominal pain

• Chronic diarrhoea 

• Steatorrhea 

• Weight loss PLUS  

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• Evidence of Giardia intestinalis trophozoites or cysts on serial 3 samples of stool examination     

OR

• Serological evidence of G. Intestinalis trophozites antigen or antibody  

OR

• Evidence of G.Intestinalis in duodenal aspirates or biopsy specimen.

 

Pharmacological Treatment

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• Metronidazole (PO) 400–800mg 8 hourly for 5 days 

OR

• Tinidazole (PO) 2g once daily for 3 days  

OR 

• Secnidazole (PO) 2g single dose 

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Updated on, 2.11.2020

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References

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1. STG