In a person with a healthy immune system
first infected with
toxoplasmosis, most people don't get sick. A few
people have mild flu-like symptoms, which can last as long as several months.
This is why people rarely know whether or when they have had toxoplasmosis.
Symptoms can include:
In a newborn
Most infected newborns have no
symptoms at birth. But without treatment, some can develop eye or brain damage
that ranges from mild to severe. Blindness can develop up to 20 years after
birth, but this is rare.
Some infected newborns have severe
symptoms at birth, including:
In a person with a weak immune system
A person who
has a very weak immune system (weakened by HIV infection, organ transplant
lymphoma) can develop
life-threatening toxoplasmosis. Antibiotic therapy is
often used to prevent this from happening. Severe infection requires aggressive
In very rare cases, otherwise healthy people who get
toxoplasmosis can have severe symptoms related to the brain, eyes, lungs, or
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