Product Overview
MEFLUVAC™ H9 0.3 is an inactivated monovalent vaccine for immunization against Low Pathogenic Avian Influenza H9N2.
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MEFLUVAC™ H9 0.3
MEFLUVAC™ H9 0.3 is an inactivated monovalent vaccine for immunization against Low Pathogenic Avian Influenza H9N2.
Chickens.
Infections resulting from the Low Pathogenic Avian Influenza (LPAI) subtype H9N2 continue to pose a substantial threat to poultry populations in Asia, the Middle East, and Africa.1 The implications of H9N2 virus infections are far-reaching, leading to economic losses across various poultry sectors, including layers, breeders, and broilers. The impact includes a significant decline in egg production, up to 20%, which can be increased by potential co-infections with pathogens like Infectious Bronchitis Virus (IBV), Newcastle disease virus (NDV), and bacterial agents like E. coli and Mycoplasma. These concurrent infections have the potential to amplify overall losses.2,3,4 Furthermore, the H9N2 virus induces profound immunosuppression and damage to immune organs in chickens, thereby interfering with the production of antibodies against specific vaccines such as NDV. This viral strain is also linked to performance deterioration, evident through reduced feed conversion rates (FCR) and body weight. The cumulative effects underscore the widespread and adverse consequences associated with H9N2 infections within the poultry industry.5,6
For primer or booster vaccination to protect commercial poultry against Low Pathogenic Avian Influenza H9N2.
Birds can be vaccinated from one day of age onwards, as per advice from your poultry veterinarian.
Onset of immunity: 3 weeks after the first vaccination.
Duration of immunity: conditioned to the vaccination scheme established for the local epidemiological situation.
Zero days.
The vaccine dose (0.3 mL/bird) should be administered subcutaneously in the lower part of the neck or intramuscularly in the thigh or breast muscles.
The vaccine may occasionally separate into two layers on storage. This in no way affects its potency, but the vaccine should be shaken vigorously before and during use to ensure good emulsification.
Do not use the vaccine if you notice critical irreversible separation of the emulsion.
Before use, the vaccine should be shaken well to ensure proper mixing. Sterile injection equipment should be used to avoid contamination.
MEFLUVAC™ H9 0.3 is packed and presented in 300 mL (1000 doses) polyethylene terephthalate (PET) bottles.
References
1. Guan Y, et.al . (2000) H9N2 influenza viruses possessing H5N1-like internal genomes continue to circulate in poultry in southeastern China.
2. Ayoub, et. al. Evaluation of some vaccination programs in protection of experimentally challenged broiler chicken against Newcastle disease virus. Am. J. Anim. Vet. Sci. 2019.
3. Sultan, H.A.et. al. Protective Efficacy of Different Live Attenuated Infectious Bronchitis Virus Vaccination Regimes against Challenge with IBV Variant-2 Circulating in the Middle East. Front. Vet. Sci. 2019.
4. Monne et. al. H9N2 influenza A virus circulates in H5N1 endemically infected poultry population in Egypt. Influenza Other Respir. Viruses 2013.
5. Qiang F, Youxiang D. The effects of H9N2 influenza A on the immune system of broiler chickens in the Shandong Province. Transbound Emerg Dis. 2011 Apr;58(2):145-51. doi: 10.1111/j.1865-1682.2010.01192.x. Epub 2011 Jan 4. PMID: 21205254.
6. Ellakany, H.F., Gado, A.R., Elbestawy, A.R. et al. Interaction between avian influenza subtype H9N2 and Newcastle disease virus vaccine strain (LaSota) in chickens. BMC Vet Res 14, 358 (2018).
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