Investigation Launched into Suspected STEC Infection Cluster Among Oncologists at Princess Margaret Hospital

CHP conducts comprehensive investigation into suspected Shiga toxin-producing Escherichia coli infection cluster at PMH

The Head of the Communicable Disease Branch of the Centre for Health Protection (CHP) of the Department of Health, Dr Albert Au, said today (February 11) that the CHP is conducting a comprehensive investigation into a suspected Shiga toxin-producing Escherichia coli (STEC) infection cluster, involving three doctors in the Oncology Department of Princess Margaret Hospital (PMH), with one of them passed away on February 7.

After receiving notification from PMH yesterday (February 10), the CHP representatives, together with representatives from PMH and the Chair of Infectious Diseases of the Department of Microbiology of the University of Hong Kong (HKU), Professor Yuen Kwok-yung, conducted an inspection of the workplace of the Oncology Department and other facilities of the hospital this morning.

"The case involves three oncologists at the hospital. Initial investigation revealed that they developed symptoms on February 4, 6 and 10 respectively. Symptoms included fever, abdominal pain and diarrhea. One of them, who had onset of symptoms on February 4, was admitted to PMH for treatment on February 6 and passed away the following day. The other two affected persons had mild symptoms," Dr Au said.

"Preliminary test results showed that the stool specimen from one of the three affected persons tested positive for STEC, while that of the other two affected persons (including the deceased patient) tested negative. Taking into account the clinical and epidemiological information, the CHP tentatively believed that the cluster may be associated with STEC infection," he said.

The CHP's epidemiological and environmental investigations are ongoing. The CHP will continue to collaborate with the Hospital Authority and the Department of Microbiology of the HKU to investigate the incident and trace the potential source of infection.

PMH has strengthened the monitoring of the gastrointestinal symptoms among its staff and has requested any staff members with relevant symptoms to report immediately for laboratory tests. The PMH has also arranged comprehensive disinfection of the oncology office area.

In general, STEC infections are usually associated with the consumption of contaminated food or water, such as raw or undercooked meat products, contaminated fruits and vegetables, and unpasteurised dairy products. Direct person-to-person transmission through the faecal-oral route can also occur.

Suspected leakage of leachate from WENT Landfill

A spokesperson for theEnvironmental Protection Department (EPD) made the following announcement today (July 8) regarding an incident of suspected leakage of leachate from landfill.

At around 2.30pm today, the EPD found that there was suspected leakage of leachate at one of the stormwater outfalls at the West New Territories (WENT) Landfill. The stormwater outfall connects to Tai Shui Hang next to the landfill. Based on current assessments, most of the leachate has been intercepted by a silt curtain regularly installed at the stormwater outfall, so the amount of leachate leaked to Tai Shui Hang has been limited.

The EPD has collected water samples at the location concerned for testing. Preliminary investigation revealed that the dissolved oxygen and the pH levels in the water samples are normal, with no signs that there is a significant impact on the water quality and ecology in Tai Shui Hang and the Deep Bay. The EPD will conduct more testing and follow up on the matter.

The contractor of the EPD's WENT Landfill has taken a series of follow-up measures, including:

• Arranging tankers to remove leachate from the stormwater outfall and Tai Shui Hang;
• Arranging a diversion upstream of the stormwater outfall to intercept the water source from entering the outfall; and
• Arranging additional measures, including placing sandbags and adding extra silt curtains, to further intercept the suspected leakage of leachate.

The EPD will continue to closely monitor the situation and strive to remove the leachate to prevent continuous leakage to Tai Shui Hang. The EPD will also work with the landfill contractor to investigate the cause of the incident so as to take further measures to tackle the problem at source.

Source: AI-found images