1.Epidemiological characteristics of the epidemic of human H5N1 avian influenza in Northern Vietnam 2003-2004
Journal of Preventive Medicine 2004;14():5-9
At the end of 2003 and early 2004, an epidemic of avian influenza with 10 cases and 7 deaths occurred in the North of Vietnam, a subtype H5N1 (A/H5N1) has been identified. The prevalence of total infection with epidemic syndrome in the whole area at the same time was 0.1%, the prevalence infected cases of death was very high (70%). The epidemic was widely distributed in 7 provinces and the highest number of cases was observed in the forth week by the onset of the first case. Sick hens were the evidence of causes. There was not direct infection from human to human. However, there were two case-clusters that happened in the same family, this may be a suggestion of biological and familial factors associated with the susceptibility to the causal virus A/H5N1
Epidemiology
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Influenza A Virus
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H5N1 Subtype
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Influenza in Birds
2.Avian influenza A (H5N1) in 10 patients in Viet Nam
Ho Chi Minh city Medical Association 2004;9(2):67-74
Study on clinical features and epidemiology among 10 patients had avian influenza A who treated in hospital in Ho Chi Minh City and Ha Noi 12/2003 and 1/2004, 13,7 mean age. In all patients, the diagnosis of influenza A (H5N1) was confirmed by means of viral culture or reverse transcriptase polymerase chain reaction (RT-PCR) with primers specific for H5 and N1. None of the 10 patients had pre-existing medical conditions. Nine patients had a clear history of direct contact with poultry. All patients had fever, respiratory symptoms and clinically significant lymphopenia. The medium platelet count was 75.500/mm3. Seven patients had diarrhea. In all patients, there were marked abnormalities on chest radiography. There was no definitive evidence of human to human transmission, eight patients died
Influenza A Virus, H5N1 Subtype
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Influenza in Birds
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epidemiology
3.An influenza outbreak at Hung Yen province early 2004
Journal of Preventive Medicine 2004;14(2):78-83
In early 2004, following an epidemic of avian influenza A/H5N1 in human, an outbreak of influenza A/H3 occurred in 5 communes at Hung Yen province with 887 cases and no deaths. This outbreak developed quickly but only in medium geographical range (inter-commune). Most cases are of school-age (from 5 to 19 years old) which comprise over 85% of the total number and focus mainly in primary and secondary schools. Owing to discovered early the outbreak, consisted of determinate the reasons and response to outbreak quickly and strongly and applied routinely to prevention the spread through the respiratory, and it also the good lesson to the prevention of outbreak
Disease Outbreaks
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Influenza, Human
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epidemiology
Result Analysis
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