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Streptococcus dysgalactiae subsp. dysgalactiae presents with progressive weakness in limbs: a case report and literature review

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BMC INFECTIOUS DISEASES
卷 23, 期 1, 页码 -

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BMC
DOI: 10.1186/s12879-023-08190-3

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Streptococcus dysgalactiae subsp.; dysgalactiae; Muscle weakness; Penicillin; Case report

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This is a case of human infection with SDSD, which is believed to be limited to animals. The patient experienced muscle pain and weakness, followed by sore throat, headache, and fever. After treatment, the patient's condition greatly improved and fully recovered within a month.
Background Streptococcus dysgalactiae subsp. dysgalactiae has been identified as an animal pathogen that is thought to occur only in animal populations. Between 2009 and 2022, humans infected with SDSD were reported rarely. There is a lack of details on the natural history, clinical features, and management of disease caused by this pathogen. This case outlines a human SDSD with muscle aches and progressive loss of muscle strength leading to immobility and multi-organ dysfunction syndrome. Case presentation She presented with muscle pain and weakness, and later developed a sore throat, headache and fever with a maximum temperature of 40.5 degrees C. The muscle strength of the extremities gradually decreased to grade 1 and the patient was unable to move on his own. Next-generation blood sequencing and multi-culture confirmed the presence of Streptococcus dysgalactiae and Streptococcus dysgalactiae subsp. Dysgalactiae, respectively. A Sequential Organ Failure Assessment score of 6 indicated septicemia, and therapeutic antibiotics were prescribed empirically. After 19 days of inpatient treatment, the patient's condition greatly improved and completely recovered within a month. Conclusion Symptoms of Streptococcus dysgalactiae subsp. dysgalactiae presenting with progressive limb weakness resemble polymyositis, so a precise differential diagnosis is essential. Multidisciplinary consultation is helpful when polymyositis cannot be ruled out and facilitates the choice of an optimal treatment protocol. In the context of this case, penicillin is an effective antibiotic for Streptococcus dysgalactiae subsp. dysgalactiae infection.

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