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Hong Kong health chief steps up fight against rats with tech

According to a recent report, Hong Kong’s health chief said the government was checking if there were new technologies available to fight rats as she also pledged to step up enforcement on illegal dumping of rubbish.

The health chief’s remarks came as it emerged the city’s rat problem could be far worse than first thought after the reliability of rodent infestation surveys were called into question.

The creatures, which usually hide in dark spots around the city, stole the limelight last week after a 56-year-old local man became the first person worldwide to contract a strain of the hepatitis E virus, previously found only in animals such as rats.

The Centre for Health Protection was probing how the virus was transmitted to the man, the health chief stated.

The government is looking at whether there are new technologies that can be used to fight rats. The government will definitely put more resources into this, the health chief said, without elaborating on the methods being considered.

The chief also said the Food and Environmental Hygiene Department had distributed leaflets to restaurants on how to prevent rodents at their premises, and that officers would strengthen enforcement on illegal dumping. Rat bait had also been used to kill the pests, said the chief, the secretary for food and health.

The minister said the methods used to kill rats were recommended by the World Health Organisation.

Since 2000, the government has compiled a rodent infestation rate for the city’s 18 districts. It calculated the percentage index by dividing the amount of rat poison consumed by rodents, with the total amount of bait collected from a specific area.

But Wong Tai Sin, the district where the man with the hepatitis E strain lives, had a rodent infestation rate of just 1% in the first half of this year, sparking concerns over the survey’s accuracy.

The rodent infestation rate for the whole city was 2.8% for the period. Tsuen Wan was worst hit by rats, at 8.2%, followed by 6.4% in Kwun Tong.

Asked if the slow clean-up after Typhoon Mangkhut had led to more rats in Hong Kong, Chan said different departments had been working around the clock on the recovery.

The Food and Environmental Hygiene Department disposed of several thousand tonnes of trash in just a few days (after the typhoon), according to the chief.

Residents told her more rodents had been spotted recently because the typhoon blew away rat nests.

A veteran rat catcher questioned the measurement process of the rodent infestation rate and said the poison was difficult for rats to consume because it was wrapped in plastic bags, prompting the animals to resort to other “good food” in nearby restaurants, food waste and rubbish.

Another report noted that in the wake of Typhoon Mangkhut – the most intense storm on record to slam the city – many parts of town are still struggling to repair and clean up after the devastation.

The range of destructive and increasingly costly shocks that cities face go beyond natural disasters: public transport failures, social unrest, migration crises, terrorism, currency collapses, economic turmoil and outbreaks of disease (one of them being hepatitis E) are but a few examples.

The hope is that despite the devastation that Typhoon Mangkhut has caused the government can find ways to address, mitigate and then eliminate the rat infestation problems currently facing Hong Kong.

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