Department of Science reveals Thailand’s first case of COVID-19 “Deltacron”

The Department of Science detected the first XBC or Deltacron strain in Thailand Currently, the infected person has fully recovered, and the proportion of Omicron BA.2.75 and its descendants has continued to increase to 63.3% from 42.9 % No signs of severity of the mutant strain were found. But it could make it easier to spread and infect.

Today (November 30), Dr. Supakij Sirilak, Director General of the Department of Medical Sciences Disclosure of information on surveillance and tracking of mutations of COVID-19 in the country and tracking of the strain of anxiety that may have been discovered by travelers entering the country during the last week. Between November 19-25, 2022, the SNP/Deletion surveillance results by RT-PCR method of 299 cases showed that, in the overall picture, the proportion of BA.2.75 increased to 63.3% from the previous week with the proportion of 42.9 . % and when separated by group It was found that the majority tends to increase among those infected in the country, increasing from 23.2% to 43.9% and the latest 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. (BN.1), BA. ( BL .2) more than 468 cases (this number includes 216 cases that are imported to be distributed to the international database GISAID) 4 times, a rapid increase of omicron mutant types There is a possibility of increase the number of infections until the original strain spreading in the area is replaced.

In addition, four cases of XBB.1 and seven cases of BQ.1 were detected for XBC or Deltakron strains. Currently, only 1 case has been found in Thailand. The XBC strain is a hybrid of Delta and Omicron BA.2, with data from 20 November 2022. XBC strains from many countries have been report on the database. Number 153 of GISAID International cases, which have not yet found signs of the severity of the mutant infection. But it could make it easier to spread and infect. In the case of the patient who was the first to detect the XBC strain in Thailand, he has now fully recovered.

Dr. About the weekly situation around the world, it was found that
• 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 added “The Department of Medical Sciences together with the network continues to monitor and monitor the mutations of COVID-19. And is continuously published on the international database GISAID Monitor the effect that a subspecies of the strain of concern may have on the severity of the disease. effectiveness of public health measures or other related virus characteristics as information to support treatment planning 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”

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