Retrospective investigation and analysis of pertussis in Ninghai Countyï¼ Zhejiang Province from 2018 to 2019
Journal Title: Shanghai Journal of Preventive Medicine - Year 2023, Vol 35, Issue 8
Abstract
ObjectiveTo characterize the incidence of laboratory confirmed pertussis cases by immunization status in Ninghai Countyï¼ and to provide evidence for improving pertussis prevention and control strategy in Ninghai County.MethodsData of reported pertussis cases in Ninghai County from 2018 to 2019 were collected through the National Notifiable Infectious Disease Reporting System. The immunization history of vaccines related to pertussis was collected through the Ningbo Immunization Planning Information Management System and field investigation. Descriptive epidemiological methods were used to analyze the collected data.ResultsThe respiratory secretions collected in the 64 cases tested positive for nucleic acid of Bordetella pertussis bacilliï¼ of which 56.25% aged 0â1 year. They were mainly pre-school children. No adolescent or adult case was reported. All cases had whooping cough. Of the casesï¼ 78.13% had an increase in white blood cell countï¼ 62.5% had an increase in lymphocyte percentageï¼ 59.38% had completed three or more doses of pertussis vaccinationï¼ 69.39% had a time interval of >1 year between the onset and last dose of pertussis vaccinationï¼ and 31.25% reported close contact with pertussis patients before the onset. The misdiagnosis rate of pertussis was as high as 92.19%. In contrastï¼ the prevalence of anti-pertussis IgG antibody in health population was 1.05%.ConclusionFurther improvement in the laboratory testing capacity can help clarify the diagnosis of pertussis. Generallyï¼ children aged 0-1 year are mainly affectedï¼ of which vast majority have received at least one dose of pertussis vaccination. Clinical symptoms are characterized by whooping cough. Additionallyï¼ elevated white blood cells and lymphocytes should be on the alert to pertussis infection.
Authors and Affiliations
WANG Fan,ZHANG Haibin,HU Lili,CHEN Wei,PENG Hanyao,WANG Bin,
Keywords
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