Related Experiment Videos
Outbreak of poliomyelitis--Dominican Republic and Haiti, 2000
Insights
Poliovirus type 1 caused outbreaks of acute flaccid paralysis (AFP) in the Dominican Republic and Haiti in 2000. Most affected children were unvaccinated, highlighting the need for improved polio vaccination coverage.
Area of Science:
- Epidemiology
- Infectious Diseases
- Virology
Background:
- Acute flaccid paralysis (AFP) is a critical indicator of potential poliovirus circulation.
- Polio outbreaks pose a significant public health threat, especially in regions with suboptimal vaccination rates.
Purpose of the Study:
- To report and analyze cases of acute flaccid paralysis (AFP) associated with poliovirus type 1 in the Dominican Republic and Haiti during 2000.
- To assess the vaccination status of affected individuals and understand the epidemiological characteristics of the identified poliovirus cases.
Main Methods:
- Surveillance for acute flaccid paralysis (AFP) cases.
- Laboratory confirmation of poliovirus type 1 isolates from clinical specimens.
- Epidemiological investigation including patient age and vaccination history.
Main Results:
- Nineteen cases of AFP were identified in the Dominican Republic between July and November 2000, with six confirmed poliovirus type 1 cases.
- The majority of AFP case-patients (84%) were six years old or younger.
- All identified case-patients in the Dominican Republic and Haiti were unvaccinated or inadequately vaccinated against polio.
Conclusions:
- Poliovirus type 1 was circulating and causing acute flaccid paralysis (AFP) in the Dominican Republic and Haiti in 2000.
- The findings underscore the critical importance of high vaccination coverage to prevent polio transmission and outbreaks.
Abstract:
During July 12-November 18, 2000, 19 persons with acute flaccid paralysis (AFP) were identified in the Dominican Republic, including six laboratory-confirmed cases with poliovirus type 1 isolates. Of the 19 case-patients, 16 (84%) were aged < or = 6 years (range: 9 months-21 years). All case-patients were either unvaccinated (n=14) or inadequately vaccinated (n=5). In Haiti, a single laboratory-confirmed poliovirus type 1 case was reported in an inadequately vaccinated child aged 2 years; paralysis onset was August 30. Despite intensive case-finding activities, no additional cases have been identified.