Bird Flu Avian Influenza Diagnosis Causative Virus Signs and Symptoms With Treatment

Bird Flu Bird flu or Avian Influenza is an infectious dis­ease of birds caused by type A influenza virus.

There may be pneumonia, ARDS and multi-or­gan failure,Avian influenza A is caused by H5Nl, H7N3, H7N7 and H9N2 strains. The H5Nl virus causes severe disease in man result­ing in death.

 

 

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Bird FluBird flu or Avian Influenza isaninfectious dis­easeof birds
  • Birds are the natural hosts for influenza A. Humans are affected very rarely.
  • There are 3 types of influenza viruses A, Band C. Influenza A viruses are classified into:
  • 1. HA- Haemagglutinin
  • 2. NA – Neuraminidase
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Bird FluBird flu or Avian Influenza virus

Bird Flu Avian Influenza Avian influenza A is caused by

  • H5Nl,
  • H7N3,
  • H7N7 and
  • H9N2 strains.
  • The H5Nl virus causes severe disease in man result­ing in death.
  • The infection can lead to a pandemic.
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Transmission of infection Bird Flu Avian Influenza


Transmission of infection Bird Flu Avian Influenza

  • · Direct contact with poultry, or their faeces is the main source of infection.
  • · Infection occurs during the slaughtering of birds for cooking.
  • · It is very rare for humans to get infected by this virus.
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Transmission of infection Bird Flu Avian Influenza


Clinical features Bird Flu Avian Influenza

  • · There is an influenza-like illness.
  • · There may be conjunctivitis.
  • · Gastrointestinal symptoms like abdominal pain, diarrhoea and vomiting may occur.
  • There may be pneumonia, ARDS and multi-or­gan failure.
  • There may be consolidation, collapse and inter­stitial disease seen on chest X-ray.
  • Reye’s syndrome and pulmonary haemorrhage may also occur.
  • The disease is commonly seen 3-4 days after exposure.
  • It presents as community acquired pneumonia with fever.

 

Clinical featuresk
Clinical features Bird Flu Avian Influenza


Investigations Bird Flu Avian Influenza

  • · Lymphopenia
  • · Thrombocytopenia
  • · Pneu mothorax
  • · Findings of ARDS (Acute respiratory distress syndrome)
  • · Features of multiorgan damage
  • · Disseminated intravascular coagulation (DIe)
  • · Hemophagocytic syndrome.

Diagnosis Bird Flu Avian Influenza

  • • There is history of contact with poultry.

Treatment Bird Flu Avian Influenza

  • Those with a history of contact with poultry and severe pneumonia should be treated with Oseltamivir, and broad spectrum antibiotics.
  • Dose of Oseltamivir is 75 mg twice a day for 5 days.
  • Vaccines for pandemic virus are not available as yet.

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