Heightened vigilance warranted under persistently high scarlet fever activity
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According to the CHP's surveillance data, the weekly number of SF cases increased from 41 in the week of February 26, 2017, to 49 and 59 in the two subsequent weeks. Regarding SF outbreaks in schools/institutions, six affecting 12 pupils/children were recorded in the last three weeks.
"The local SF activity is usually higher from November to February and from June to July. Of note, after the seasonal peak from December 2016 to January 2017, the SF activity increased again in the last few weeks and was higher than that in the same period in previous years. Parents should take extra care of their children in maintaining strict personal, hand and environmental hygiene," a spokesman for the CHP said.
As of March 18, a total of 474 SF cases had been reported to the CHP in 2017, comprising 286 males and 188 females aged from 2 months to 31 years, nearly all of which (465, 98 per cent) were under 10. Most presented with mild illnesses and clinical presentations were largely similar to cases in previous years. Among them, 170 cases (36 per cent) have required hospitalisation. No severe cases requiring admission to an intensive care unit or deaths have been recorded so far.
"We will issue letters to doctors, hospitals, schools and institutions to alert them to the latest situation. Schools should promptly report to the CHP in case of an increase in respiratory illnesses or absentees for immediate epidemiological investigations and outbreak control," the spokesman said.
SF is a bacterial infection caused by Group A Streptococcus. It mostly affects children. It is transmitted through either respiratory droplets or direct contact with infected respiratory secretions.
It usually starts with a fever and sore throat. Headache, vomiting and abdominal pain may also occur. The tongue may have a distinctive strawberry-like (red and bumpy) appearance. A sandpaper texture-like rash would commonly begin on the first or second day of onset over the upper trunk and neck before spreading to the limbs. The rash is usually more prominent in armpits, elbows and groin areas. It usually subsides after one week and is followed by skin peeling over fingertips, toes and groin areas.
SF is sometimes complicated with middle ear infection; throat abscess; chest infection; meningitis; bone or joint problems; damage to the kidneys, liver and heart; and, rarely, toxic shock syndrome. SF can be effectively treated by appropriate antibiotics. People suspected to have SF should consult a doctor promptly.
There are no vaccines available against SF. Members of the public are advised to take heed of the health advice below:
- Maintain good personal and environmental hygiene;
- Always keep hands clean and wash with liquid soap when they are dirtied by mouth and nasal fluids;
- Cover your nose and mouth while sneezing or coughing and dispose of nasal and mouth discharge properly;
- Avoid sharing personal items such as eating utensils and towels;
- Maintain good ventilation; and
- Sick children should refrain from attending school or child care settings until they fully recover.
The public may visit the CHP's SF page for more information.
Ends/Tuesday, March 21, 2017
Issued at HKT 17:14
Issued at HKT 17:14
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