Molecular Epidemiology of Tuberculosis in Buenos Aires
Author Information
Author(s): Gonzalo Ximena, Ambroggi Marta, Cordova Ezequiel, Brown Tim, Poggi Susana, Drobniewski Francis
Primary Institution: Hospital de Infecciosas Francisco Javier Muñiz, Buenos Aires, Argentina
Hypothesis
To analyze the molecular epidemiology of Mycobacterium tuberculosis strains at a hospital in Buenos Aires, Argentina, and mutations related to multidrug-resistant and extensively drug-resistant tuberculosis.
Conclusion
The study found that the Haarlem2 strain of MDR TB is predominant and suggests the need for rapid diagnosis to reduce transmission.
Supporting Evidence
- The Haarlem2 strain was responsible for a previous outbreak in the 1990s.
- 43 out of 57 MDR TB strains had a mutation in the katG315 locus.
- 6 strains had a mutation in the inhA region.
- 5 extensively drug-resistant TB strains were detected.
Takeaway
The researchers looked at tuberculosis germs in Buenos Aires and found that a specific type of germ is very common and can be hard to treat.
Methodology
A prospective case-control study was conducted, analyzing strains of Mycobacterium tuberculosis for drug resistance and mutations.
Potential Biases
The specialized nature of the hospital may have biased the sample towards more severe cases.
Limitations
The study only included hospitalized patients, which may not represent the entire population.
Participant Demographics
57 patients with MDR TB and 100 fully susceptible unmatched inpatient controls.
Statistical Information
P-Value
0.004
Confidence Interval
1.491–13.845
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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