In an update presented to the Portfolio Committee on Agriculture, Land Reform and Rural Development on October 20, the South African Poultry Association (Sapa) has estimated that 30% of the South African poultry industry has been impacted on by the latest outbreaks of Highly Pathogenic Avian Influenza (HPAI).
Sapa broiler organisation GM Izaak Breitenbach said the current outbreak of the H5N1 and H7N6 strains of HPAI will cost the industry in excess of R1.8-billion, which is the amount of losses the industry experienced during the prior period of HPAI outbreaks in 2019, which saw three-million birds culled.
Sapa egg organisation GM Dr Abongile Balarane estimated that the losses to the industry could be as high as R3-billion, given that a 30% impact to the industry equates to 30% of its yearly revenue of about R12-billion lost.
South Africa had about 27-million layer hens that produce eggs on a daily basis, of which five-million had to be culled for both HPAI strains. Another 2.5-million broiler chickens also had to be culled this year, bringing the total amount of culled chickens to 7.5-million.
The H7N6 strain of the virus was first reported on June 1 on a farm in Mpumalanga. DALRRD animal health director Mpho Mojo confirmed that the H7N6 strain of the virus spreads slower and is less deadly than its H5N1 counterpart, adding that many birds often survive the disease; however, it has nonetheless had a significant impact on the local poultry industry.
Additionally, she said that, because the H7N6 strain only occurs in South Africa and is not closely similar to any other AI strains in the rest of the world, it means that the few vaccines that have been developed against H7 may only have limited efficacy against South African strains.
Before any new vaccine can be registered, they need to be carefully assessed and may require local trial work to confirm their efficacy, which may delay their registration.
Balarane confirmed that locally produced vaccines were being developed but said this was a process that would take some time to complete.
Sapa anticipated that the poultry industry would have been reduced to 17.3-million layer hens by early 2024, down from 27.6-million layer hens in 2019 and 27.4-million in 2022.
Balarane said it would take the industry 17 months to recover lost production, with farmers intending to focus on recouping the 30% impact of the poultry industry next year.
Since HPAI first became a widespread problem in South Africa in 2017, more than 13-million birds had been culled.
With the local poultry production comprising 95% of caged operations, 1% of barn systems and 4% of free range systems, it means that most chickens are in close proximity to each other and easily spread the disease.
Mojo noted that there were fewer cases of HPAI reported in areas where small-scale farmers have free range operations and are based far from other farms.
Breitenbach highlighted that reported cases of HPAI had come down in October, compared with September, which was a positive indicator; however, a new case of the H7N6 virus having been reported in George in the Western Cape was giving rise to concerns that another outbreak would occur in the Western Cape.
HPAI outbreaks had in the year to date predominately been occurring in Gauteng, followed by Mpumalanga.
In fact, 95% of all broiler breeder chickens in Gauteng had been culled in the greater Gauteng region.
HPAI MITIGATION
Mojo explained that HPAI was introduced through emigrating wild birds, with factors such as high rainfall, the presence of wetlands, the presence of irrigated crops and wetlands and chicken density adding to the risk factors for flocks contracting HPAI.
She believed the most effective approach to ensure that HPAI does not spill over from wild birds to poultry flocks was to introduce strict measures to ensure wild and domestic birds do not come into contact, including by feeding birds undercover and removing large bodies of water in the farm's surrounding...