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Haemolytic anaemia associated with acquired toxoplasmosis
Insights
Acquired toxoplasmosis in a child can cause severe hemolytic anemia and splenomegaly. Pyrimethamine treatment effectively managed these symptoms, suggesting a direct link.
Area of Science:
- Pediatrics
- Infectious Diseases
- Hematology
Background:
- Acquired toxoplasmosis is typically a mild illness in immunocompetent individuals.
- Severe manifestations, particularly in children, warrant further investigation.
Observation:
- A 2-year-old girl presented with symptoms of acquired toxoplasmosis, including fever, rash, and lymphadenopathy.
- She subsequently developed severe hemolytic anemia and massive splenomegaly.
- Pyrimethamine treatment led to significant clinical improvement, including increased hemoglobin and reduced splenomegaly.
Findings:
- Repeated episodes over 10 years showed consistent responses to pyrimethamine.
- Withholding pyrimethamine resulted in persistent hemolytic anemia and splenomegaly, indicating a lack of spontaneous resolution.
- No underlying immunodeficiency was identified.
Implications:
- This case suggests a potential causal association between acquired toxoplasmosis and severe hemolytic anemia in children.
- Highlights the importance of considering toxoplasmosis in pediatric cases of unexplained hemolytic anemia and splenomegaly.
- Pyrimethamine appears to be an effective treatment for this specific complication.
Abstract:
A 2 year old girl presented with fever, malaise, a maculopapular rash and lymphadenopathy followed by the onset of haemolytic anaemia and massive splenomegaly. Serology was consistent with acquired toxoplasmosis. A 6 week course of pyrimethamine resulted in a rise in the haemoglobin and reduction of the splenomegaly. During the subsequent 10 years, pyrimethamine treatment of three similar acute episodes resulted in similar clinical responses. There was no spontaneous improvement in the haemolytic anaemia or splenomegaly when pyrimethamine was initially withheld for 6, 1, and 1.5 months respectively during three of these episodes. Investigations did not reveal an immunodeficiency state. This case suggests the possibility of a previously unreported causal association between acquired toxoplasmosis and haemolytic anaemia in a child.