Swine Flu - Mode of Transmission
Aug 27, · Most experts think that flu viruses spread mainly by droplets made when people with flu cough, sneeze or talk. These droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs. Apr 29, · Influenza virus may be transmitted among humans in three ways: (1) by direct contact with infected individuals; (2) by contact with contaminated objects (called fomites, such as toys, doorknobs); and (3) by inhalation of virus-laden aerosols. The contribution of each mode to overall transmission of influenza is not known.
Remarkably little is known definitively about the modes of influenza transmission. Thus, important health policy and infection control issues remain unresolved. These shortcomings have been exposed in national and international pandemic preparedness activities over recent years. Institute of Medicine have prioritised understanding the modes of influenza transmission as a critical need for pandemic planning.
Studying influenza transmission is difficult; seasonality, how to enable call forwarding attack rates, role of environmental parameters such as temperature and humidity, numbers of participants required and confounding variables all present considerable obstacles to the execution of definitive studies.
A range of investigations performed to date have failed to provide definitive answers and key questions remain. Reasons for this include the fact that many studies have not sought to investigate routes of transmission as a primary objective what foods to eat when training for a half marathon, they have evaluated specific interventions and that fieldwork in natural settings, specifically assessing the dynamics and determinants of transmission between humans, has been limited.
The available evidence suggests that all routes of transmission droplet, aerosol and contact have a role to play; their relative significance will depend on the set of circumstances acting at a given time. Dictating the process are factors related to the virus itself, the host and the environment.
Keywords: Aerosol; contact; droplet; influenza; transmission. Abstract Remarkably little is known definitively about the modes of influenza transmission. Publication types Review.
Impact of Health Care Facility–Acquired Influenza
Influenza is spread mainly from person to person by droplet infection or droplet nuclei created by sneezing, coughing or talking. The portal of entry of the virus is the respiratory tract. Incubation Period for Influenza The incubation period is about 18 to 72 hours. Remarkably little is known definitively about the modes of influenza transmission. Thus, important health policy and infection control issues remain unresolved. These shortcomings have been exposed in national and international pandemic preparedness activities over recent manuelacosplay.us by: Jul 13, · Indirect-contact transmission involves contact of a susceptible host with a contaminated intermediate object, usually inanimate, in the patient's environment. Contact transmission of .
The human to human mode of transmission of the deadly swine flu virus is likely to occur when an infected person coughs or sneezes in the presence of uninfected people. It could be mild in its effect or potentially be severe. A single droplet of 0. A single sneeze releases over 40, droplets. The droplets can either remain as aerosol or settle on objects. The avian influenza virus can survive indefinitely when frozen.
The virus can survive for one to two days on surfaces such as plastic or metal and for about fifteen minutes on dry paper tissues but only five minutes on skin.
In the mucus secretions, it can survive longer. The same inoculum in the presence of respiratory mucus showed a striking increase in survival time up to 17 days. They concluded that the unexpected stability of influenza virus should be considered in the setting of pandemic preparedness.
Level of humidity and UV radiation can influence the survival of the virus. Low humidity combined with lack of sunlight during winters can be optimal for the virus to survive longer and this accounts for the higher prevalence of flu during winter months. Influenza is known to occur commonly in pigs and the major route of transmission in these animals is also through direct contact between the infected and the uninfected animals.
Pigs are raised and transported in close proximity and this increases the risk of transmission. Direct touching or transmission through air is also possible. Wild animals play a role in transmitting the disease between farms. Farm hands who work with poultry and swine are at an increased risk of acquiring a zoonotic infection. The others at risk, albeit at a lower scale include veterinarians and those involved in meat processing.
Continuous public health surveillance and vaccination against swine flu are paramount to protect these people and to prevent the spread of the disease.
This is an informative article on this subject and I really enjoyed the read. My regards and appreciation to the writer of this amazing material To know more about Flu Symptoms. I am so worried about catching the swine flu. I have done everything in my power to protect myself and my family.
Even to the point that if it were to become so out of control that we needed to be locked in our house for some time due to the pandemic. Very good illustrations by Medindia. The same strain of the virus was identified in Mexico, Canada, and elsewhere. Methods - Enhanced surveillance was implemented in the United States for human infection with influenza A viruses that could not be subtyped. Of 22 hospitalized patients with available data, 12 had characteristics that conferred an increased risk of severe seasonal influenza, 11 had pneumonia, 8 required admission to an intensive care unit, 4 had respiratory failure, and 2 died.
The S-OIV was determined to have a unique genome composition that had not been identified previously. Conclusions A novel swine-origin influenza A virus was identified as the cause of outbreaks of febrile respiratory infection ranging from self-limited to severe illness.
Reeja Tharu , M. Medically Reviewed by Dr. Urol Lond. Last Updated on Nov 20, Mode of Transmission The human to human mode of transmission of the deadly swine flu virus is likely to occur when an infected person coughs or sneezes in the presence of uninfected people.
Color Blindness Calculator. Drug Side Effects Calculator. Sputum Test - Influenza Tests. Flu fever is caused by influenza virus and it is a respiratory infection. It causes chilness,fever,coughs. A nasopharyngeal swab sample is required. Quiz on Flu. Influenza or rather, the flu is a cold weather infectious condition that affects the young and old alike.
Though most reported cases are mild, the flu can sometimes cause severe and life-threatening complications in both children and adults, Bird Flu. Is the world in the grip of its first influenza pandemic in forty years? It definitely seems so!
The current swine flu or pig flu disaster traces its origin to the badly- hit State of Mexico. Swine Flu Risk Calculator. Find out the risks for contracting swine flu and take the necessary precautionary steps. Swine flu caused a pandemic in with several deaths reported worldwide.
Quiz Yourself on Swine flu. Swine flu is the infection of the influenza virus, H1N1, which infects the respiratory tract of pigs. The virus then mutates to become easily transmitted to humans. Symptoms of swine flu are similar to other influenza infections such as high fever, Health Benefits of Pumpkin.
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