Viral Etiology of Influenza-Like Illnesses in Antananarivo, Madagascar, July 2008 to June 2009
2011

Viral Infections Causing Influenza-Like Illnesses in Madagascar

Sample size: 313 publication 10 minutes Evidence: moderate

Author Information

Author(s): Razanajatovo Norosoa Harline, Richard Vincent, Hoffmann Jonathan, Reynes Jean-Marc, Razafitrimo Girard Marcellin, Randremanana Rindra Vatosoa, Heraud Jean-Michel

Primary Institution: Institut Pasteur de Madagascar

Hypothesis

What are the viral pathogens responsible for influenza-like illnesses in Madagascar?

Conclusion

Respiratory viruses significantly contribute to influenza-like illnesses in Madagascar, especially among children under 5 years old.

Supporting Evidence

  • 75.1% of samples tested positive for at least one respiratory virus.
  • Children under 5 years had a higher rate of viral infections compared to older age groups.
  • Co-infections were found in 29.4% of infected patients.

Takeaway

Doctors found that many kids in Madagascar with flu-like symptoms actually had other viruses, not just the flu. This is important for treating them better.

Methodology

The study collected respiratory specimens from patients with influenza-like illness and tested them for 14 respiratory viruses using multiplex real-time PCR.

Potential Biases

The study's strict inclusion criteria may have excluded many viral infections without fever or asymptomatic cases.

Limitations

The study had a limited sample size and was biased towards younger patients, which may affect the generalizability of the findings.

Participant Demographics

The study included 313 patients, with 44.1% males and 55.9% females, and a median age of 10 years; 49.2% were children under 5 years old.

Statistical Information

P-Value

0.02

Confidence Interval

[1.1–3.6]

Statistical Significance

p<0.05

Digital Object Identifier (DOI)

10.1371/journal.pone.0017579

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