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[Epidemiological characteristics of pertussis in Vojvodina]
Vladimir Petrović1, Predrag Durić, Slavica Stefanović
1Institut za zastitu zdravlja Novi Sad.
Insights
High pertussis (whooping cough) vaccination coverage in Vojvodina has dramatically reduced disease incidence and deaths. Unimmunized infants and young children remain most affected, highlighting the need for improved surveillance.
Area of Science:
- Epidemiology
- Immunology
- Public Health
Context:
- Pertussis (whooping cough) was historically a common childhood respiratory illness in Vojvodina.
- The pre-immunization era (1948-1960) saw high incidence rates of pertussis.
Purpose:
- To analyze the effects and epidemiological characteristics of pertussis immunization in Vojvodina over the past decade.
- To assess the impact of sustained high vaccination coverage on pertussis incidence and mortality.
Summary:
- Pertussis incidence has declined significantly since the introduction of vaccination, from 122/100,000 to 0.2/100,000 (1995-2004).
- Vaccination coverage has remained above 95%, leading to a drastic reduction in deaths.
- Unimmunized children, particularly infants, account for the majority of recent pertussis cases.
Impact:
- Sustained high immunization coverage has created a favorable epidemiological situation for pertussis in Vojvodina.
- Ongoing surveillance and improved laboratory diagnostics are crucial for monitoring and controlling pertussis, especially in vulnerable populations.
- Mild cases in immunized individuals may go unrecognized, necessitating enhanced monitoring strategies.
Introduction:
In the preimmunization era, pertussis was one of the most common respiratory diseases in children in Vojvodina.
Material And Methods:
This paper deals with effects of immunization against pertussis in Vojvodina and its epidemiological characteristics during the last 10 years.
Results And Discussion:
The average incidence rate for the preimmunization era (1948-1960) was 122/100.000. During the period of immunization, the incidence rate has been continuously declining. During the period from 1995 till 2004, average incidence rate was 0,2/100.000 There were 125 registered deaths caused by pertussis in the preimmunization era, and 13 deaths in the immunization period. The last case of death caused by pertussis occurred in 1970. Pertussis vaccination coverage in Vojvodina has been above 95% for a long period of time. Pertussis is still reported, mostly in individual cases. Since 2003, it was registered in children younger than 24 months. During the last decade, 82% of cases were unimmunized children. The majority of affected were infants (59%) and children from 12 to 24 months of age (15%). Pertussis is.registered in small children due to delayed immunization and in school children due to loss of immunity.
Conclusion:
Favourable epidemiological situation of pertussis in Vojvodina is the result of high immunization coverage. The disease is most frequently registered in individual cases, in unimmunized infants and small children. Mild cases of pertussis remain unrecognized in older age groups, in previously immunized children. It is necessary to improve surveillance and laboratory diagnostics of pertussis in order to monitor the epidemiological situation and to provide timely investigation and control of pertussis.
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