Final answer:
The signs and symptoms of toxoplasmosis can be mild and often subclinical in healthy individuals, sometimes resembling mononucleosis, but can become serious and potentially fatal in immunocompromised patients.
Step-by-step explanation:
The signs and symptoms of toxoplasmosis in individuals with healthy immune systems can include sore throat, lymph node enlargement, and other nonspecific symptoms such as muscle aches or myalgia, and they can resemble those of mononucleosis. Infected individuals may be asymptomatic or have mild flu-like symptoms. These symptoms are often subclinical, meaning they may not be noticed or severe enough to prompt individuals to seek medical attention. However, in immunocompromised patients, toxoplasmosis can reactivate and become problematic, leading to more serious conditions such as encephalitis, retinitis, pneumonitis, cognitive disorders, and seizures that can be fatal.