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Some Observations on Diphtheria Carriers.

J E McCartney, W C Harvey

Proceedings of the Royal Society of Medicine

|December 9, 2009

Summary

This summary is machine-generated.

Diphtheria carriers exhibit higher rates of nasal and throat abnormalities compared to patients and convalescents. Nasal conditions are particularly prevalent in carriers, suggesting a link between pathology and the carrier state.

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Area of Science:

Medical Microbiology
Infectious Diseases
Public Health

Background:

Diphtheria remains a significant public health concern, with carriers playing a crucial role in transmission.
Understanding the clinical characteristics of diphtheria carriers is essential for effective control strategies.

Purpose of the Study:

To compare the prevalence of nasal and throat abnormalities in diphtheria carriers, patients, and convalescents.
To investigate factors contributing to the diphtheria carrier state.
To assess the reliability of negative cultures in determining carrier clearance.

Main Methods:

Clinical examination of 288 diphtheria carriers, 300 patients, and 100 convalescents.
Analysis of the proportion of abnormal conditions in the nose and throat across the three groups.
Evaluation of age-specific carrier rates and the impact of nasal passage anatomy.

Main Results:

Carriers showed a significantly higher prevalence of overall (94.1%) and nasal (72.2%) abnormalities compared to patients (73% overall, 42.6% nasal) and convalescents (52% overall, 7% nasal).
Pathological conditions in the nose and throat of diphtheria patients appear to facilitate the carrier state.
Diphtheria bacilli shedding in carriers is intermittent, and multiple negative cultures may not guarantee clearance.

Conclusions:

Nasal and throat pathology are strongly associated with the diphtheria carrier state, particularly in young children.
The presence of underlying pathological conditions in patients contributes to becoming a carrier.
Relying solely on negative cultures is insufficient to clear carriers of diphtheria infection.