Swine influenza (swine flu) is a respiratory disease of pigs caused by type
A influenza virus that regularly causes outbreaks of influenza in pigs.
Swine flu viruses cause high levels of illness and low death rates in pigs.
Swine influenza viruses may circulate among swine throughout the year, but
most outbreaks occur during the late fall and winter months similar to
outbreaks in humans. The classical swine flu virus (an influenza type A
H1N1 virus) was first isolated from a pig in 1930.
Swine Flu in Humans
Can humans catch swine flu?
Swine flu viruses do not normally infect humans. However, sporadic human
infections with swine flu have occurred. Most commonly, these cases occur in
persons with direct exposure to pigs (e.g. children near pigs at a fair or
workers in the swine industry). In addition, there have been documented
cases of one person spreading swine flu to others. For example, an outbreak
of apparent swine flu infection in pigs in Wisconsin in 1988 resulted in
multiple human infections, and although no community outbreak resulted,
there was antibody evidence of virus transmission from the patient to health
care workers who had close contact with the patient.
What are the symptoms of swine flu in humans?
The symptoms of swine flu in people are expected to be similar to the
symptoms of regular human seasonal influenza and include fever, lethargy,
lack of appetite and coughing. Some people with swine flu also have reported
runny nose, sore throat, nausea, vomiting and diarrhea.
Can people catch swine flu from eating pork?
No. Swine influenza viruses are not transmitted by food. You can not get
swine influenza from eating pork or pork products. Eating properly handled
and cooked pork and pork products is safe. Cooking pork to an internal
temperature of 160 degrees Fahrenheit kills the swine flu virus as it does
other bacteria and viruses.
How does swine flu spread?
Influenza viruses can be directly transmitted from pigs to people and from
people to pigs. Human infection with flu viruses from pigs are most likely
to occur when people are in close proximity to infected pigs, such as in pig
barns and livestock exhibits housing pigs at fairs. Human-to-human
transmission of swine flu can also occur. This is thought to occur in the
same way as seasonal flu occurs in people, which is mainly person-to-person
transmission through coughing or sneezing of people infected with the
influenza virus. People may become infected by touching something with flu
viruses on it and then touching their mouth or nose.
adopted from the Center for Disease Control and Prevention (CDC) website.
See the CDC website
for more information
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