[The first confirmed pediatric case with H7N9 avian influenza virus infection in China]
Mei Zeng1, Yan-feng Zhu1, Yan-ling Ge1
1Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai 201102, China.
Insights
Avian influenza A (H7N9) virus infection in children presents with a milder clinical course compared to adults. Further surveillance is needed to understand the epidemiology and exposure sources in pediatric cases.
Area of Science:
- Virology
- Pediatric Infectious Diseases
- Epidemiology
Background:
- Avian influenza A (H7N9) virus poses a potential threat to public health, with a need to understand its impact on pediatric populations.
- Limited data exists on the clinical and epidemiological characteristics of H7N9 infection in children.
Observation:
- A previously healthy 3.6-year-old boy in Shanghai was diagnosed with influenza A (H7N9) virus infection.
- The child presented with mild symptoms including fever and rhinorrhea.
- The virus was detected via real-time reverse transcriptase PCR and virus culture from a nasopharyngeal sample.
Findings:
- The pediatric case exhibited a relatively mild clinical course compared to adult H7N9 infections.
- No secondary infections were found among 16 monitored contacts.
- The source of infection and specific exposure details for the child remain unknown.
Implications:
- Understanding the clinical spectrum of H7N9 in children is crucial for public health preparedness.
- Continued surveillance for mild, severe, and subclinical H7N9 infections in children is essential.
- Further research is needed to elucidate transmission dynamics and identify exposure risks in pediatric populations.
Objective:
To understand the clinical and epidemiological aspects of avian influenza A (H7N9) virus infection in children.
Method:
The clinical data of the first confirmed pediatric case of avian influenza A(H7N9) virus infection were collected, and the epidemiological information, presenting symptoms, laboratory investigation, management and outcome were analyzed. The data of the pediatric cases were also compared with those of the adults cases.
Result:
The case reported in this paper was a previously healthy 3.6-year-old boy residing in rural area of Shanghai. He had onset of fever and mild rhinorrhea on 31 March 2013 and he was afebrile and well since April 3. Influenza A (H7N9) virus was detected in his nasopharyngeal sample collected on 1 April through national Influenza-like Illness surveillance using real-time reverse transcriptase PCR and virus culture.His family raised domestic poultry with no apparent disease and there was no virological evidence of H7N9 infection. Monitoring and testing of 16 contacts had not found any secondary infection.
Conclusion:
The clinical course of H7N9 avian influenza virus infection in children was relatively mild as compared to adult cases. The source of infection and detail of exposure for children have not been known yet. Continued surveillance studies of mild and severe respiratory disease and subclinical infection are essential to further characterize the epidemiology and clinical spectrum of this emerging H7N9 virus infection in children.
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