The new semester has just started.
How are you getting along with the
first term of your master studies?
the past few weeks, there had been a lot of confirmed local cases
suffering from dengue fever.
Comparing with the recorded cases
between 2015 & last year, it is obvious that there is a surge of
locally infected cases this summer.
Blood sample testing of these cases indicates that they are only
positive for dengue virus serotype 1, that is, uncomplicated dengue
fever, and, fortunately,
most of these patients are in
It is noted that an initial contact with dengue virus of any
serotype will normally result in mild symptoms, such as fever and
However, if exposure to subsequent
infection is with another serotype of dengue virus, the patient
could end up with a more severe condition, namely the Dengue
Hemorrhagic Fever, which would experiencecoma, organ failure and
protect the public from the threat of dengue fever, it is necessary
for the Government to be more vigilant in fighting against this
Although the Government has announced a temporary closure of the
Lion Rock Park, and the conduction of thorough mosquito eradication
and control measures in Cheung Chau, the showers and thunderstorms
over the past weeks provide a favorable condition for massive
mosquito breeding, and, worse still, stagnant water after the rain
allows mosquitoes to thrive again.
With such adverse weather, the risk of spreading mosquito-borne
diseases may be aggravated.
Therefore, the Government should
continuously carry out intensive and timely anti-mosquito measures
including fogging in the scrubby areas, applying insecticide and
frequent trimming of grass to prevent mosquito proliferation.
The Aedes mosquito is believed to be the main vector that transmits
the virus which causes dengue fever.
According to the World Health
Organization, Aedes mosquitos have a short flight range with only
around 100 m, and egg production sites are likely to be closed to
where these mosquitos are found.
However, these eggs could sometimes
also be transmitted via cargos, tyres, containers, and, even,
in the case of Hong Kong, residents and visitors of the Lion Rock
Park or Cheung Chau may unnoticeably carry out mosquito eggs that
have laid on their clothes and bags to the city center, and, as a
result, scaled up the mode of spread in the community.
view of the situation, it is suggested that apart from carrying out
district-based anti-mosquito operations, the Government should also
initiate a territory-wide exercise onprevention of mosquito bites
and mosquito breeding to avoid further outbreak of the disease.
Moreover, it seems that some members of the public have overlooked
the severity of dengue fever.
There has been news reporting that
some people are still continuing their morning exercises around the
Lion Rock Park.
mentioned earlier, though some dengue infected people may not
develop apparent symptoms, and some first contracts may only have
mild symptoms like fever, subsequent infections with other serotypes
of dengue virus are more likely to result in severe dengue cases
which may end up with poor prognosis and grave recovery.
the Government should also take this opportunity to caution the
individuals on the possible impacts and associated problems with
this acute mosquito-borne infection.
should be reminded to stay vigilant on taking precautionary measures
of preventing mosquito bites, and to stay away from visiting those
high risk areas unnecessarily.
suggested by the Center for Health Protection, individuals are
advised to wear light-colored and long-sleeved clothing and
trousers, apply mosquito repellents containing DEET to exposed parts
of the body, use mosquito nets or screens when the room is not
air-conditioned, avoid visiting scrubby area and install screens on
windows and doors.
Community efforts are also very important.
It is hoped that the Government
should take continuous actions to remind the public to heighten
vigilance and keep up effective prevention and control measures
against mosquitoes, as well as to take personal protective measures
to reduce the risk of contracting mosquito-borne diseases through
Meanwhile, the Hospital Authority should also raise its alertness
and readiness for the contingency response measures in managing the
possible outbreak of dengue fever in Hong Kong, and in particular,
the public hospitals should be prepared to manage an overwhelming
influx of severe dengue fever cases due to subsequent infections.
Recently, it is reported that an error had been made in a laboratory
test on the serotype of dengue virus which could indeed have
detrimental impact on the management of dengue fever.
Assuming that such incident may be
resulted from a sudden surge of workload, the Government, in
particular, the Center for Health Protection, should rectify the
situation and to sustain the effectiveness of the testing laboratory
by allocating appropriate resources in an timely manner.
Interesting, it is also noted that the ovitrap index for Aedes
mosquitoes over the past months is of record high, yet, the Food and
Environmental Hygiene Department is still reluctant to carry out a
territory-wide anti-mosquito operations.
The new school term has just started after the summer recess.
Schools and educational
institutions are crowded with students, and, possibly, mosquitoes as
well, so the risk of transmitting dengue fever may come to concern.
To prevent the transmission of dengue fever, schools, students and
parents should be advised to follow appropriate personal protective
measures against mosquitoes bites and keep the school areas and the
environment clean against mosquito breeding.
Removal of stagnant water is of
prime importance to the prevention of mosquito breeding and
It is therefore suggested that
school should appoint a designated staff for mosquito prevention and
Schools have to be inspected at
least once a week to remove stagnant water.
As Aedes mosquitos may lay eggs in
small pools of stagnant water, refuse such as soft drink cans and
lunch boxes should be properly disposed of in covered litter
Moreover, the school can also hold
talks and disseminate booklets to students and parents, teaching
them the proper way to prevent mosquito bites and breeding.
Both the Government and schools
should remain vigilant against the transmission of dengue fever.
long-run, the Government should commit to carry an ongoing
territory-wide anti-mosquito policy to control mosquito
proliferation all year round so as to prevent the Dengue to become
an endemic illness.
the very best for your further studies.