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Toxoplasmosis is a topic covered in the 5-Minute Emergency Consult.

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  • Toxoplasma gondii—intracellular protozoan parasite:
    • 3 forms:
      • Tachyzoite: Asexual invasive form
      • Tissue cyst: Persists in tissues of infected hosts during chronic phase
      • Oocyst: Contains sporozoites and produced during sexual cycle in cat intestine
  • Transmission:
    • Ingesting tissue cysts or oocysts:
      • Ingesting undercooked meat
      • Vegetables contaminated with oocysts
      • Contact with cat feces, through cat or soil
    • Transplacental
    • Blood product
    • Organ transplantation


  • 70% of adults seropositive
  • Asymptomatic in most immunocompetent patients
  • Worldwide; cats are the common host
  • Incubation is 7 days with a range of 4–21 days

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Rosen, Peter, et al., editors. "Toxoplasmosis." 5-Minute Emergency Consult, 5th ed., Lippincott Williams & Wilkins, 2016. Emergency Central, emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307067/all/Toxoplasmosis.
Toxoplasmosis. In: Rosen P, Shayne P, Barkin AZ, et al, eds. 5-Minute Emergency Consult. 5th ed. Lippincott Williams & Wilkins; 2016. https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307067/all/Toxoplasmosis. Accessed April 24, 2019.
Toxoplasmosis. (2016). In Rosen, P., Shayne, P., Barkin, A. Z., Wolfe, R. E., Hayden, S. R., Barkin, R. M., & Schaider, J. J. (Eds.), 5-Minute Emergency Consult. Available from https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307067/all/Toxoplasmosis
Toxoplasmosis [Internet]. In: Rosen P, Shayne P, Barkin AZ, Wolfe RE, Hayden SR, Barkin RM, Schaider JJ, editors. 5-Minute Emergency Consult. Lippincott Williams & Wilkins; 2016. [cited 2019 April 24]. Available from: https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307067/all/Toxoplasmosis.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Toxoplasmosis ID - 307067 ED - Rosen,Peter, ED - Shayne,Philip, ED - Barkin,Adam Z, ED - Wolfe,Richard E, ED - Hayden,Stephen R, ED - Barkin,Roger M, ED - Schaider,Jeffrey J, BT - 5-Minute Emergency Consult UR - https://emergency.unboundmedicine.com/emergency/view/5-Minute_Emergency_Consult/307067/all/Toxoplasmosis PB - Lippincott Williams & Wilkins ET - 5 DB - Emergency Central DP - Unbound Medicine ER -