WHAT IS BIRD FLU?
Bird flu is called as an Avian influenza type A virus. The dreaded bird flu virus has claimed many lives and played havoc with the poultry industry in some countries of Asia and Europe. It is also being detected every year around the world. Despite, all the precautionary measures, its entry into any country could not be stopped eventually. The exact definition of the Bird can be given in a different way-
From poultry Book
According to the Disease of poultry book, it is defined as an appellation “bird flu” that is used as a simplified. Which alternative to avian influenza by the media to describe infections in poultry, humans, and other mammals with Type A influenza viruses derived from birds.
Bird flu Since that outbreak in 2002, H5N1 HPAI also referred to as “bird flu. It is the primordial reservoir of all influenza A viral genes. In a similar way, all other Influenza A subtypes, the H5N1 subtype is an RNA virus.
From Nomenclature Origin
Bird Flu is an infectious disease of birds caused by the Influenza A (H5N1) virus. It is also called ‘H5N1 virus’– occurs mainly in birds. It is highly contagious among birds and can be deadly to them. It is defined, H5N1 is a subtype of the species Influenza A virus of the Influenzavirus A genus of the Orthomyxoviridae family.
According to Pathotype
High Pathogenic noticeable Avian Influenza (HPNAI) viruses must have an IVPI in six-week-old chickens greater than 1.2. alternatively, cause at least 75% mortality in four- to eight-week-old chickens infected intravenously. In the case of the sub-type.
H5 or H7 viruses which do not have an IVPI of greater than 1.2. In another ward, H7 viruses which do not have an IVPI of greater than 1.2. if the amino acid motif is similar to that observed for other HPNAI isolates, the isolate being tested should be considered as HPNAI viruses.
According to European union
Infection of poultry caused by an influenza A virus that has an intravenous pathogenicity index in 6-week-old chickens >1.2. or any infection with influenza A viruses of subtype H5 or H7 for which nucleotide sequencing has demonstrated the presence of multiple basic amino acids at the cleavage site of the haemagglutinin.’
Ramzan, DVM, Poultry Veterinarian
- Avian Influenza and Newcastle Disease by A Field and Laboratory Manual Foreword by Joseph Domenech and Bernard Vallat
- Diseases Of Poultry, 13 the edition
- Poultry Diseases, 6th edition
- OIE Manual Of Diagnostic Tests And vaccines For Terrestrial Animals