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KMID : 1100720180380030266
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Annals of Laboratory Medicine
2018 Volume.38 No. 3 p.266 ~ p.270
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Seasonal and Temperature-Associated Increase in Community-Onset Acinetobacter baumannii Complex Colonization or Infection
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Kim Young-Ah
Kim Jin-Ju
Won Dong-Ju
Lee Kyung-Won
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Abstract
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Identifying the trends in community-onset Acinetobacter baumannii complex isolation and diversity according to temperature could help provide insight into the behavior of the A. baumannii complex. We performed a retrospective analysis of A. baumannii complex (Acinetobacter baumannii, Acinetobacter nosocomialis, Acinetobacter pittii, and Acinetobacter calcoaceticus) isolates obtained from patients at a Korean community hospital from 2006 to 2015 with reference to seasonal temperatures. The incidence rates were compared between warm (June?September) and cold (November?March) months, defined as an average mean temperature ≥20°C and ≤5°C, respectively. Incidence rate was calculated as the number of cases per month, converted to cases/105 admissions for healthcare-acquired isolates and cases/103 outpatients for community-onset isolates. Approximately 3,500 A. baumannii complex cases were identified, and 26.2% of them were community-onset cases. The median (interquartile range) number of community-onset A. baumannii complex cases was significantly higher (P =0.0002) in warm months at 13.8 (9.5?17.6) than in cold months at 10.1 (6.3?13.2). There was a strong correlation between community-onset A. baumannii complex cases and temperature (Pearson’s r=0.6805, P =0.0149). Thus, we identified a seasonality pattern for community-onset A. baumannii complex colonization or infection, but not for healthcare-acquired cases.
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KEYWORD
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Acinetobacter baumannii complex, Community-onset, Seasonality
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