What are the classification of influenza viruses?

There are four types of influenza viruses: A, B, C and D. Human influenza A and B viruses cause seasonal epidemics of disease (known as flu season) almost every winter in the United States. Influenza A viruses are the only influenza viruses known to cause flu pandemics, i.e., global epidemics of flu disease.

What are the different types of avian influenza?

Five subtypes of avian influenza A viruses are known to have caused human infections (H5, H6, H7, H9, and H10 viruses). The most frequently identified subtypes of avian influenza A viruses that have caused human infections are H5, H7 and H9 viruses.

What disease category is avian influenza?

Avian influenza or bird flu refers to the disease caused by infection with avian (bird) influenza (flu) Type A viruses.

What is the scientific name of the avian flu?

Scientific Name. Orthomyxoviridae, Influenza Type A (CABI) Common Name. Highly pathogenic avian influenza (HPAI), fowl plague.

What is the difference between H5N1 and H1N1?

The H5N1 influenza virus has thus far resulted in very limited human-to-human transmission. However, it has an exceptionally high fatality rate of more than 60%, which is in sharp contrast with the 2009 H1N1 influenza virus fatality rate of around 1% (WHO 2009a).

What is the difference between influenza and avian influenza?

Avian flu and pandemic flu are not the same thing. Avian influenza, or “bird flu”, is a virus that affects birds. Pandemic flu is human flu that would affect millions of people all around the world. Very rarely, an avian flu virus will infect a person.

How many strains of avian influenza are there?

There are two types of avian influenza (AI) that are identified as H5N1. A difference exists in the virus classification; one is low pathogenic (LPAI) and the other is highly pathogenic (HPAI). Pathogenicity refers to the ability of the virus to produce disease.

What’s the difference in type A and type B flu?

Because influenza A can spread from animals to humans, it can cause pandemics. Influenza B is also very contagious, but only spreads between humans. Influenza B can be more common and more severe than influenza A in children. In the population as a whole, influenza A tends to be milder.

What is a H1 and 1?

The H1N1 flu, commonly known as swine flu, is primarily caused by the H1N1 strain of the flu (influenza) virus. H1N1 is a type of influenza A virus, and H1N1 is one of several flu virus strains that can cause the seasonal flu. Symptoms of the H1N1 flu are the same as those of the seasonal flu.

Are all subtypes of avian influenza pathogenic?

Most strains of avian influenza are not highly pathogenic and cause few signs of disease in infected wild birds. However, in poultry, some low pathogenic strains can mutate into highly pathogenic avian influenza strains that cause a contagious and severe illness among poultry and sometimes wild birds, and often death.

Which is stronger influenza A or B?

In the past, it was thought that infection with influenza A was more severe than infection with influenza B. However, a 2015 study in adults with influenza A and influenza B found they both resulted in similar rates of illness and death.

What are the symptoms of influenza A and B?

People who have flu often feel some or all of these symptoms:
  • fever* or feeling feverish/chills.
  • cough.
  • sore throat.
  • runny or stuffy nose.
  • muscle or body aches.
  • headaches.
  • fatigue (tiredness)
  • some people may have vomiting and diarrhea, though this is more common in children than adults.

What are the three types of viruses?

The Three Major Types of Computer Viruses
  • Macro viruses – These are the largest of the three virus types. …
  • Boot record infectors – These viruses are known also as boot viruses or system viruses. …
  • File infectors – These viruses target .

Which flu causes vomiting?

The flu (influenza) affects only your respiratory system — your nose, throat and lungs. Gastroenteritis, on the other hand, attacks your intestines, causing signs and symptoms such as: Watery, usually nonbloody diarrhea — bloody diarrhea usually means you have a different, more severe infection. Nausea, vomiting or …

What is worse influenza A or B?

Type A influenza is generally considered worse than type B influenza. This is because the symptoms are often more severe in type A influenza than in type B influenza. Type A influenza is more common than type B influenza. Researchers suggest that most adults have considerable immunity against type B influenza.

What is Type A flu and Type B flu?

Type A. The most common form of influenza, type A can spread from animals to humans and is known to cause pandemics. Type B. Similar to type A, influenza B is also highly contagious and can have dangerous effects on your health in more severe cases. However, this form can only be spread from human to human.

What are the treatment of flu?

Antiviral drugs can help treat flu illness: Antiviral drugs are different from antibiotics. Flu antivirals are prescription medicines (pills, liquid, intravenous solution, or an inhaled powder) and are not available over the counter. Antiviral drugs can make illness milder and shorten the time you are sick.

Is yogurt good for BRAT diet?

That diet should include a mix of fruits, vegetables, meat, yogurt, and complex carbohydrates. Both children and adults who are ill need to drink plenty of fluids to prevent dehydration. Water is good, but adding broth, a sports drink, or a rehydration solution can help replace lost electrolytes.

What virus causes headache and diarrhea?

Common symptoms of norovirus infection include vomiting, diarrhea, and stomach cramping. Less common symptoms can include low-grade fever or chills, headache, and muscle aches. Symptoms usually begin 1 or 2 days after ingesting the virus, but may appear as early as 12 hours after exposure.

What is the prevention and control of influenza?

Annual flu vaccination is the best way to prevent flu in our community. Clean hands often with soap and water or use alcohol-based hand rub. Don’t share personal items like toothbrushes or drinks. Cover your mouth and nose with a tissue (or shirt sleeve) when sneezing, coughing, or nose blowing.

What are the causes of influenza?

The flu is caused by an influenza virus. Most people get the flu when they breathe in tiny airborne droplets from the coughs or sneezes of someone who has the flu. You can also catch the flu if you touch something with the virus on it, and then touch your mouth, nose, or eyes.

What are the two main types of influenza treatments?

Type A influenza infection can be serious and cause widespread outbreaks and disease. Common symptoms of type A infection can be confused with other conditions.
…
Common antiviral prescriptions include:
  • zanamivir (Relenza)
  • oseltamivir (Tamiflu)
  • peramivir (Rapivab)

Who discovered influenza?

The history of influenza begins with Hippocrates (5th century BC) who first reported that an influenza-like illness spread from Northern Greece to the islands south and elsewhere.