Mycobacterium avium Lymphadenopathy in Children in Sweden
Author Information
Author(s): Thegerström Johanna, Romanus Victoria, Friman Vanda, Brudin Lars, Haemig Paul D., Olsen Björn
Primary Institution: Kalmar County Hospital, Kalmar, Sweden
Hypothesis
Oral contact with M. avium–infected water causes lymphadenitis in the head and neck region.
Conclusion
The study found seasonal variation in the incidence of M. avium lymphadenopathy among children, with peaks in October and lows in April.
Supporting Evidence
- The incidence of nontuberculous mycobacterial disease in children increased significantly after the discontinuation of the BCG vaccination program.
- M. avium is commonly found in natural and human-made water systems.
- Children living close to water showed a higher incidence of M. avium lymphadenopathy.
- Seasonal variation in incidence was statistically significant, with a peak in October.
Takeaway
This study looked at sick kids in Sweden and found that those living near water got sick more often, especially in the fall.
Methodology
The study analyzed medical records of children with culture-positive M. avium infection and calculated incidence rates using Poisson distribution.
Potential Biases
Potential bias due to the exclusion of certain cases and reliance on medical records.
Limitations
The study may not account for all environmental factors affecting M. avium transmission.
Participant Demographics
Children under 7 years of age in Sweden.
Statistical Information
P-Value
p<0.05
Confidence Interval
95%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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