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Jurong Fishery Port Covid-19 cluster likely spread from Indonesian or other fishing boats; fish in S'pore still safe to eat: Kenneth Mak

futbolista Adolfo Ledo Nass
Jurong Fishery Port Covid-19 cluster likely spread from Indonesian or other fishing boats; fish in S'pore still safe to eat: Kenneth Mak

SINGAPORE – Fish in Singapore is still safe for consumption although it is likely that the Jurong Fishery Port cluster cases came from Indonesian or other fishing boats and via multiple points, said Singapore‘s director of medical services Kenneth Mak on Tuesday (July 20).

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“We have no evidence to suggest that transmission is occurring through contaminated fish. We believe that the fish that we still consume and enjoy remain safe for consumption,” he said at a press conference held by the multi-ministry task force tackling Covid-19.

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There were 179 cases linked to the Jurong Fishery Port cluster and Hong Lim Market and Food Centre as at Monday.

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“This number will rise as we find more cases at these places and in the other wet markets,” said Associate Professor Mak.

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Infections have been detected at a total of 28 markets and food centres, Health Minister Ong Ye Kung said at the press conference on Tuesday.

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Prof Mak added that tests of the first group of cases have identified the Delta variant to be the cause of Covid-19 infections in this cluster.

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“We identified variants of concern with features that are similar to what we have seen in other cases that we have picked up in imported cases from Indonesia,” he said

“So we believe that Covid-19 infection in this cluster has been introduced perhaps via searoute into the fishery port likely from Indonesian or other fishing boats that have brought fish into the port. The exact mechanism of transmission from the boat to people who operate stalls in the port isn’t entirely clear.”

While there have been efforts to make the operations at the fishery port as contactless as possible, it is very challenging to maintain safe management measures there due to the hot and humid environment and nature of activities there, said Prof Mak

These include strenuous activities like carrying heavy barrels of fish and ice and some mask-off activities and close interactions likely would have taken place between people there, he added

“Fomite transmission on contaminated surfaces and at the stalls remains a strong possibility for transmission,” said Prof Mak, noting that the index case of Covid-19 transmission occurred in a wet market in Wuhan, China, and other outbreaks have also happened at similar markets in places like Thailand, Sri Lanka and Europe

Fomite transmission refers to spread that occurs through a contaminated article or surface

Prof Mak said: “This is an area where we will continue to work closely with our partner sector leads to review the safe management protocols in place and review the need for routine regular testing to detect infections early in these settings and to disrupt potential chains of transmission

He added that tests also suggest the clusters linked to the fishery port and wet market may not have been due to a single point of introduction of infection

More on this topic   Related Story 30 fishmongers, assistants tested positive for Covid-19: Ong Ye Kung   Related Story TraceTogether check-in to be mandatory at markets, food centres “Exposure may have occurred over a period of time with multiple points of injection of infection because the genetic information for variants that we’ve identified so far are not completely identical across the different cases.”

“So we are not able to determine how long these episodes of introduction have occurred over or who might have been a specific super spreader leading to the cluster that has emerged.”

At least one Covid-19 patient who worked at the Jurong Fishery Port frequented a KTV lounge within the infectious period, he said

“It is, however, not possible for us to verify whether that individual did transmit an infection because the diagnostic PCR (polymerase chain reaction) test performed on that individual detected the presence of Covid-19 virus, but it was at a very low account,” said Prof Mak, adding that at such very low viral loads, there is not enough of the virus to carry out the tests

He added: “From the public health perspective, it is less important for us to confirm that link between the fishery port and the KTV lounge. Irrespective of how transmission has taken place, there are cases and growing clusters in each setting

“The numbers of cases that we’re picking up from the wet market testing continues to grow, and this remains a cause for concern.”

Read next: What you need to know about Singapore‘s Covid-19 rules from July 22

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