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Streptococcal Infections and Exacerbations in PANDAS: A Systematic Review and Meta-analysis

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BACKGROUND: The pediatric autoimmune neuropsychiatric disorders associated with streptococcal infection (PANDAS) hypothesis suggests an association between group A beta-hemolytic streptococcus (GABHS) infections and subsequent onset or exacerbation of neuropsychiatric symptoms, such as obsessive-compulsive disorder or tic disorders.

METHODS: We performed a systematic review and meta-analysis including longitudinal, prospective studies on exacerbations of neuropsychiatric symptoms associated with GABHS infections in children with PANDAS. We searched PubMed and EMBASE through August 14, 2017. Two independent reviewers extracted data and we used random-effects analysis to calculate rate ratios (RR).

RESULTS: Three studies were included with a total of 82 PANDAS cases and 127 control children with obsessive-compulsive disorder or chronic tic disorder. PANDAS cases had a nonsignificantly increased RR of 2.33 [95% confidence interval [CI]: 0.63-8.70, P = 0.21, I = 28.3%] for exacerbations of neuropsychiatric symptoms in temporal proximity to a GABHS infection and no increased risk of GABHS infections (RR = 0.99, 95% CI: 0.56-1.73, P = 0.97, I = 45%) compared with the control children. However, PANDAS cases had an increased risk of neuropsychiatric exacerbations in general with a RR of 1.54 (95% CI: 1.12-2.11, P = 0.008, I = 0%) compared with the control children. The studies had methodologic heterogeneity, high risk of selection bias and differed concerning case definition and infection measures.

CONCLUSIONS: Our findings did not show significant evidence concerning higher rates of temporally associated GABHS infections and exacerbations of neuropsychiatric symptoms in children with PANDAS. The included studies were small and limited by low GABHS rates and exacerbations. Future studies with large population sizes and routine evaluations are needed to thoroughly examine the PANDAS hypothesis.

TidsskriftThe Pediatric infectious disease journal
Udgave nummer2
Sider (fra-til)189-194
Antal sider6
StatusUdgivet - feb. 2019

ID: 56472168