How long does it take for Mycoplasma pneumoniae to turn negative after a positive result?

Jan 02, 2025 Source: Cainiu Health
Dr. Ren Yi
Introduction
Most patients who test positive for mycoplasma pneumonia typically become negative within two weeks after effective treatment. For pediatric patients with mild mycoplasma pneumonia, if timely and appropriate treatment is received, the test may turn negative in about two weeks. The time to negativity for adult patients is generally slightly longer than for children. With proper treatment, it usually takes around three weeks for mycoplasma pneumonia to become negative.

  The time for Mycoplasma pneumoniae to turn from positive to negative varies depending on individual differences and the severity of the condition. Under normal circumstances, it may take 2 to 4 weeks to become negative. It is recommended that patients seek timely medical treatment at a hospital. The analysis is as follows:

  1. 2-3 weeks

  For most patients, after testing positive for Mycoplasma pneumoniae and receiving effective treatment, the conversion to negative usually occurs within 2 weeks. Pediatric patients with mild cases of Mycoplasma pneumonia who receive timely and appropriate treatment may become negative around 2 weeks. The time required for adults to turn negative is generally slightly longer than in children; with proper treatment, adults usually become negative within approximately 3 weeks.

  2. 3-4 weeks

  However, if the condition is severe—for example, involving multiple lung lobe lesions, accompanied by other complications, or occurring in individuals with pre-existing immunodeficiency—the time required for the test to turn negative may be prolonged to 3-4 weeks.

  If a positive result for Mycoplasma pneumoniae is confirmed, prompt medical attention should be sought to prevent worsening of the condition. Adequate rest and avoiding physical exhaustion during treatment can aid in recovery.

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