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Congo fever: authorities remain on high alert
Di Caelers 2005-10-13
Health authorities will remain on high alert for the next 10 days in respect of hospital and emergency services staff who had contact with the man who died of Congo fever.
Only on October 21 when they
will be able to say for certain whether the threat has passed.
And farmers in the Riversdale area are being notified to de-tick their livestock
in a further bid to ensure the virus does not spread.
Meanwhile, seven people, including the dead man's widow and his son, have been
released from isolation in
Riversdale
Hospital
after infectious diseases specialists concluded they were now out of danger.
The 46-year-old farm labourer
from a farm between Swellendam and
Heidelberg
, who has still not been named, died at 10.40am on Monday, the first confirmed
case of Congo Fever in the
Western Cape
since 2001.
He is
believed to have been infected with the virus, which is tick-borne, during the
slaughter of an infected cow on the farm on which he worked on September 24.
He was transferred to
Groote
Schuur
Hospital
last Wednesday, and the Congo Fever diagnosis was confirmed last Friday.
Although more than 100 people have been affected by
the outbreak, provincial health authorities who called an emergency media
briefing following the man's death on Monday, are confident there is little
likelihood of a spread.
A total 74 staff from Groote Schuur and the local
emergency medical services, 49 people in Riversdale, and 28 staff at the
George
Hospital
are among those who have been closely monitored since the Congo Fever
diagnosis was confirmed, said Dr Keith Cloete, acting chief director of health
programmes in the
Western Cape
.
Infectious diseases expert Professor Robin Wood
explained that the longest recorded incubation period in respect of Congo
Fever was 13 days. Hence, their policy was to keep everyone who may have come
into contact with the virus under close observation for 14 days.
The group of people who had been in closest contact
with the dead man, including four other people who participated in the
slaughter of the cow, have now been ruled as being out of danger.
But Cloete said the observation period for the
close to 100 medical staff who may have been in contact with the man would end
only on October 21. Until then the staff were having their temperatures taken
every morning and every evening, as well as being observed for any other
symptoms of ill health.
Wood said people who were bitten by ticks while
walking locally in the mountains were not at any risk of contracting Congo
Fever. There was also no danger from eating meat, even the meat from an
infected animal.
The virus was passed in blood to the person
identified as the primary case usually through a cut in the skin,
and during the slaughtering of an animal which had been bitten by an infected
tick.
Because Congo Fever patients bled excessively,
people who came in contact with the infected blood of the patient could be
infected.
Wood said the average
Congo
fever death rate was around 30 percent.
This patient had bad prognostic signs. There
were many organs involved and he was bleeding profusely, Wood said of
the man who died on Monday after massive organ failure.
Wood explained that bleeding was the major cause of
death of people with Congo Fever. The virus consumed the clotting factors in
the body and treatment involved transfusions of blood and blood products,
particularly platelets.
There was also an anti-viral drug that could be
used, but only in early treatment.
Diary
-
September
24: Five men, including the one who died on Monday, slaughter a cow on a
farm between Swellendam and
Heidelberg
.
-
September
26: The man exhibits flu-like symptoms and seeks help from a mobile clinic
in the area.
-
September
30: He visits a local doctor in
Heidelberg
, still exhibiting flu-like symptoms, and he is given antibiotics.
-
October
3: He is admitted to
Riversdale
Hospital
.
-
October
4: He is transferred to
George
Hospital
where he is stabilised.
-
October
5: He is transferred to
Groote
Schuur
Hospital
. He has started bleeding by this point.
-
October
7: The Congo Fever diagnosis is confirmed and the man is moved into an
isolation ward.
-
October
9: His condition is reported as stable but critical.
-
October
10: His condition deteriorates and he dies at 10.40am.
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