Dr. Suphakit Sirilak, Director General of the Department of Medical Sciences Disclosure of information on tracking domestic mutations of COVID-19 and tracking strains of concern that travelers entering the country may encounter. in the last week Between 19-25 November 2022, SNP/Deletion surveillance results by RT-PCR method of 299 cases showed that the proportion of BA.2.75 in general increased to 63.3% from the previous week with the proportion of 42.9 % and when divided by groups, it was found that most tended to increase among infected people in the country. That increased from 23.2% to 43.9% and most recently to 58.8%.
From whole genome sequencing of samples in Thailand to date, strain BA.2.75 and its descendant BA.2.75, such as BA.2.75.2, BA.2.75.5.1 (BN.1), BA.2.75.1.2 ( BL .2) more than 468 cases (this number includes 216 cases that are imported to be disseminated on the international GISAID database) 4 times faster, multiple types of omikron mutant There is a possibility o increase the number of infections until the original strain spreading in the area is replaced.
In addition, 4 cases of XBB.1 and 7 cases of BQ.1 were found. One case of XBC or Deltacron has now been found in Thailand.
The XBC strain is a hybrid of Delta and Omicron BA.2 As of November 20, 2022, 153 cases of the XBC strain from different countries have been reported on the GISAID international database, however, no signs of virulence have been found from the mutated pathogen But it could make it easier to spread and infect. In the case of patients with an XBC strain that was first detected in Thailand. Now he has recovered.
Dr said. Supakit, for the weekly situation around the world, was found to be
• BA.5 and its progeny. It is still the most common species worldwide, accounting for 72.1%.
• BA.4 and its progeny. A decrease since last week from 3.6% to 3.0%.
• BA.2 and its offspring accounted for 9.2%, an increase from the previous week.
• BA.1 and its offspring found less than 1%.
• BQ.1 and its offspring have found an increase since the previous week (from 19.1% increasing to 23.1%)
• XBB (hybrid strain of BA.2.10.1 and BA.2.75) and their progeny. found an increase since the previous week (from 2.0% to 3.3%)
Dr Supakit confirmed that the Department of Medical Sciences together with the network continues to monitor the mutation of COVID-19 And is published continuously on the international database GISAID monitoring the effect of a subspecies of the species of concern that can affect the severity of the disease the effectiveness of public health measures or other related virus property as information to support treatment planning the administration of antiviral drugs or synthetic antibodies During this time, personal measures such as wearing masks and washing hands are still needed to reduce the spread of the disease. Including the booster shot can reduce the severity. Especially Group 608
