Transcript Bird Flu H5N1

Avian Flu H5N1
ERIC 吳玟晏 90121347
JANE 呂嘉心 90122214
What is the Avian Flu?
 A contagious disease. (only between birds)
 Lately, a subtype crossed the species barrier
to infect human.
 Domestic poultry:
– High pathogenic (fatal, internal organs severely
injured, within 48 hours)
– Low pathogenic (mild symptoms like ruffled
feathers, a drop in egg production)
Which viruses cause highly
pathogenic disease?
 Influenza A viruses have 16 H subtypes and 9
N subtypes. (H and N)
 H5 and H7 subtypes are known to cause the
highly pathogenic form of the disease.
 When they can circulate in poultry
populations, they can mutate, and grow unto a
pathogenic form.
Sources of the Avian Flu
 Avian Flu is infectious disease of birds caused
by type A strains of the influenza virus. The
disease, which was first identified in Italy
more than 100 years ago, occur worldwide.
 1918 outbreaks in Italy, a Pandemic, the virus
was H1N1.
Risks
 First, if the virus can break the barrier
between birds and human beings, it will cause
very severe disease.
 Second, if given enough opportunities, it will
change into a form that is highly infectious
for humans and spreads easily from person to
person. Then it will start a global outbreak (a
pandemic.)
A Timeline of A.F.
 1996 = Highly pathogenic H5N1 virus is
isolated from a farmed goose in Guangdong.
 1997 = Human infections with H5N1 reported
in Hong Kong.
 2003 ~ = An outbreak in Asia in mid-2003
(some cases are unreported)
A History Chart of A.F.
Cumulative Number of Confirmed Human Cases of
Avian Influenza A/(H5N1) Reported to WHO
Total number of cases includes number of deaths.
WHO reports only laboratory-confirmed cases.
9 December 2005
Cambodia
Date
of
onset
China
c
a
s deaths
e
s
c
a
se
s
deaths
2003
0
0
0
2004
0
0
2005
4
Total
4
Indonesia
Thailand
Viet Nam
Total
cases
de
at
hs
cases
death
s
cases
deaths
0
0
0
3
3
3
3
0
0
17
12
29
20
46
32
2
13
8
5
2
61
19
88
35
2
13
8
22
14
93
42
137
70
cases
death
s
0
0
0
0
4
5
4
5
References
 世界衛生組織禽流感專頁
http://www.who.int/csr/disease/avian_influen
za/en/
Transmission
Animal to human
Environment to human
Human to human
Animal to human
 Touching diseased birds
 Handling fighting cocks
 Playing with poultry
 Eating undercooked poultry
Environment to human
 Droppings from poultry, migratory birds, etc.
 Our situation
Human to human
 Rarely reported
 Possibility in global influenza pandemic
Whether bird flu comes to
Taiwan or not
 To come or not? Or When it comes?
 Migratory birds
 Outbreak of bird flu
 What we can do?
--Avoid migratory
--Keep hands clean
A Correct Way to Wash Your Hands
Remember the correct steps in
washing your hands?

Wet
your hand

Soap
Your hand

Wash really
well


Rinse
your hand
Use paper
towel
Sources of information
 Internet website
www.cdc.gov
www.who.int
www.epic.gov.sg
www.info.gov.hk
Bird flu hotline
 1922
 0800-024-582
 177
Take Care !