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Treatment and prevention of giardiasis

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If giardia is confirmed or suspected – first-line therapy is often metronidazole but tinidazole or nitazoxanide may also be used. (1) (​ Some guidelines recommend tinidazole or nitazoxanide as the preferred options but metronidazole is commonly used and widely available). (2)

Prevent - sanitary disposal of faeces, filtration or boiling of water. Cysts resist usual levels of water chlorination.

References:

  1. Committee on Infectious Diseases, American Academy of Pediatrics; Kimberlin DW, Barnett ED et al. Giardia duodenalis (formerly Giardia lamblia and Giardia intestinalis) Infections (Giardiasis), Red Book: 2021–2024 Report of the Committee on Infectious Diseases. 32nd ed. American Academy of Pediatrics. 2021.
  2. Shane AL, Mody RK, Crump JA, et al. 2017 Infectious Diseases Society of America clinical practice guidelines for the diagnosis and management of infectious diarrhea. Clin Infect Dis. 2017 Nov 29;65(12):e45-80.

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