In a follow-up on the report Tuesday on the 10-year-old Hong Kong boy with suspected avian influenza A(H7), The Hong Kong Centre for Health Protection (CHP) of the Department of Health report the case is confirmed as H7N9 avian influenza. This is the fourth human H7N9 case in Hong Kong this winter.
His nasopharyngeal aspirate tested positive for influenza A(H7N9) virus upon laboratory testing by the CHP’s Public Health Laboratory Services Branch.
Contact tracing has so far identified 27 close contacts and 70 other contacts.
Close contacts are the patient’s family and school contacts as well as relevant in-patients and visitors of Princess Margaret Hospital (PMH). All have remained asymptomatic. They will be given antiviral prophylaxis with oseltamivir (Tamiflu) for five days, advised to wear a mask and put under medical surveillance for 10 days following their last exposure to the patient.
Other contacts include the patient’s school contacts, healthcare workers (HCWs) of North Lantau Hospital and PMH and ambulance personnel involved in patient transfer. Four HCWs of PMH have mild symptoms. Two of them tested negative for influenza A and two are pending testing. The others have remained asymptomatic. They will be advised to wear a mask and will be put under medical surveillance for 10 days following their last exposure to the patient.
From 2013 to date, 20 imported human H7N9 cases, including 13 males and seven females aged from 5 months to 85 years (median: 66.5 years), have been confirmed in Hong Kong, with seven deaths (35 per cent).
“In view of the upcoming Lunar New Year holidays, adults and parents should look after children with extra care in personal, hand, food and environmental hygiene against infections during travel,” a spokesman for the CHP said.
“We strongly urge the public to avoid touching birds, poultry or their droppings and visiting poultry markets or farms during travel. If feeling unwell, such as having a fever or cough, wear a mask and seek medical advice at once. Travellers returning from affected areas should consult doctors promptly if symptoms develop, and actively inform the doctors of their travel history for prompt diagnosis and treatment,” the spokesman said.
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