Congenital herpes simplex virus infection among hospitalized infants in Poland
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Department of Social Medicine and Public Health, Medical University of Warsaw, Warsaw, Poland
Witold Chodźko Institute of Rural Health, Lublin, Poland
National Institute of Public Health NIH – National Research Institute, Warsaw, Poland
Corresponding author
Krzysztof Kanecki   

Department of Social Medicine and Public Health, Warsaw Medical University, Oczki 3, 02-007, Warsaw, Poland
Ann Agric Environ Med. 2021;28(4):612-616
Introduction and objective:
Congenital herpes simplex virus infection (cHSV) is a rare entity and may pose a life-threatening disease for the newborns. Due to the public health and clinical importance of cHSV infection in infants, the recent data on this disease in Poland should be investigated. The aim of the study was to evaluate the incidence and other factors related to cHSV.

Material and methods:
The study is retrospective, population-based that utilised the hospital discharge records of cHSV patients. Data were obtained from National Institute of Public Health NIH – National Research Institute in Warsaw, Poland, covering the period 2014–2019.

The study group consisted of 1,573 cHSV newborns (841 males and 732 females). Among this group, 70.1% were infants up to 90 days of age and 3.6% were neonates up to 28 days of age. The mean and median age was 98 days (95% CI: 94.5–101.8, SD 74) and 70 days (IQR: 53–104), respectively. Based on the hospital registry the overall average cHSV incidence over the study period was estimated to be 69 per 100,000 live births. The number of cHSV infection fluctuated over the years 2014–2019 with a significant decreasing trend from 2015–2019 (P<0.01). A significantly higher cHSV incidence was observed among patients from urban than rural areas of Poland (88 vs 40/100,000 live births; P<0.001).

CHSV incidence may be related to multifactorial conditions for the occurrence of this disease. Further studies on changes in the incidence of cHSV are needed.

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