In what population is the prevalence of toxoplasmosis particularly high?

The prevalence of toxoplasmosis is particularly high in all of the populations mentioned, making the answer comprehensive.

Immunocompromised individuals, such as those with HIV/AIDS, cancer patients undergoing chemotherapy, or organ transplant recipients, are at a greater risk of severe toxoplasmosis. Their weakened immune systems struggle to control infections that a healthy person might manage without significant issues.

Pregnant women are also a key population of concern because contracting toxoplasmosis during pregnancy can lead to serious consequences for the developing fetus, including congenital infections that may result in miscarriage or neurological damage.

Children under 5 years old can be more susceptible to infections in general, but they specifically may have higher exposure due to play behaviors, such as being more likely to come into contact with contaminated soil or cat litter, which are common sources of Toxoplasma gondii.

Recognizing the vulnerability of these groups underscores the importance of preventive measures and awareness of transmission routes for toxoplasmosis. Thus, the overall prevalence is indeed notably high among all these populations.