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[Recurrent Sonne dysentery morbidity caused by Shigella of varying enzymatic types]
Abstract:
The proportion of repeated cases of dysentery caused by Sh. sonnei does not exceed 3.59% of the total number of bacteriologically confirmed cases of this infection. The frequency of reinfection depended on the enzymatic type of the causative agent. The rarest cases of reinfection were those occurring after the primary infection with Sh. sonnei, biochemical type 2, whereas the most frequent after the primary infection with Sh. sonnei, type 3. Reinfection with heterologous Sh. sonnei was registered mostly 6-12 months after the primary infection, and with homologous Sh. sonnei after a 1 year and later.
Insights
Repeated Shigella sonnei dysentery cases are rare, under 3.59%. Reinfection frequency varies by bacterial type, with type 3 causing more frequent repeat infections than type 2. Homologous reinfections occur later than heterologous ones.
Area of Science:
- Microbiology
- Infectious Diseases
- Epidemiology
Background:
- Dysentery, particularly Shigella sonnei infections, can lead to recurrent illness.
- Understanding reinfection patterns is crucial for public health strategies and disease control.
Purpose of the Study:
- To determine the incidence of recurrent Shigella sonnei dysentery.
- To investigate the influence of bacterial enzymatic type on reinfection rates.
- To analyze the time intervals between primary and subsequent infections.
Main Methods:
- Analysis of bacteriologically confirmed Shigella sonnei dysentery cases.
- Categorization of cases based on bacterial enzymatic type (e.g., biochemical type 2, type 3).
- Statistical evaluation of reinfection frequencies and timing.
Main Results:
- Recurrent Shigella sonnei dysentery accounts for less than 3.59% of all confirmed cases.
- Reinfection rates differ significantly based on the enzymatic type of the infecting strain.
- Type 3 strains were associated with higher reinfection frequency compared to type 2 strains.
- Heterologous reinfections typically occurred 6-12 months post-primary infection.
- Homologous reinfections were observed at 1 year or later after the initial infection.
Conclusions:
- Shigella sonnei reinfections are infrequent but influenced by bacterial strain characteristics.
- Enzymatic typing of Shigella sonnei provides insights into its epidemiological behavior and potential for recurrence.
- Knowledge of homologous versus heterologous reinfection timelines can inform surveillance and intervention efforts.