Thailand's Medical Sciences Department: Over 90% of October Flu-Positive Samples Were A(H1N1), With No Oseltamivir-Resistance Mutation Found
BANGKOK — Thailand's Department of Medical Sciences announced its influenza surveillance results on November 5. From January to October, the Thai National Influenza Center tested 8,734 samples, of which 1,278 were positive for influenza, a positivity rate of 14.63%. Influenza A(H1N1)pdm09 was the most common strain with 704 samples, or 55.09%, followed by A(H3N2) with 306 and influenza B/Victoria with 268.
In October alone, 122 of 581 samples were positive, a rate of 21%, and 115 of those, or 94.26% of positive samples, were A(H1N1), making it the month's overwhelmingly dominant strain. Its subclade 6B.1A.5a.2a.1 has risen markedly since June.
On drug resistance, the department's neuraminidase gene analysis found no H275Y mutation, which is associated with oseltamivir resistance, and no other mutations linked to reduced antiviral susceptibility in the January-to-October samples; 127 samples analyzed for resistance in October likewise showed none. Director-General Adisorn Wattanasak urged the public to maintain personal hygiene precautions.
Separately, Thailand's Department of Disease Control reported 543,385 influenza cases nationwide from January 1 to October 17, above the median for the same period over the past five years, keeping the situation at an alert level.
(Source: Department of Medical Sciences, Thailand)
Source: Department of Medical Sciences, Thailand
Published by GSM · USA (original Chinese edition)
Photo: 图：甲型H1N1流感病毒电镜图（美国疾病控制和预防中心，公共领域），经Wikimedia Commons。 / Photo: Electron micrograph of the influenza A(H1N1) virus (U.S. Centers for Disease Control and Prevention, public domain), via Wikimedia Commons.
