Page 2 - National Poultry Newspaper

Aspergillosis is a constant challenge
Poultry Industry Calendar of Events
2019
MAY 19 - 21 – One 19 Alltech Ideas Conference, Lexington, Kentucky US www.one.alltech.com
JUN 10 - 13 – European Symposium on Poultry Nutrition, AmberExpo in Gdansk, Poland www.espn2019.com
JUN 12-13 – Australian Biosecurity Symposium, Gold Coast, QLD www. biosym.com.au
JUN 13 – Entries close – Royal Melbourne Poultry Show, The Grand Pavilion, Melbourne, VIC www.rasv. com.au/royal-melbourne-poultry- show
JUN 23-26 –European Symposium on the Quality of Poultry Meat and XVIII European Symposium on the Quality of Eggs and Egg Products, Izmir, Turkey www.eggmeat2019.com
SEP 16-20 –World Veterinary Poultry Association Congress, Bangkok, Thailand www.wvpac2019.com
SEP 20 – Judging – Royal Melbourne Poultry Show, The Grand Pavilion, Melbourne, VIC www.rasv.com.au/ royal-melbourne-poultry-show
OCT 23 - 25 – European Symposium on Poultry Genetics, Prague, Czech Republic www.espg2019.org
NOV 5 - 7 – Poultry Tech Summit, Atlanta, US www.wattglobalmedia. com/poultrytechsummit
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ASPERGILLOSIS is a respiratory disease seen in young chicks, poults and ducklings, often under 14 days of age, but occasionally in older birds, generally caused by a fungal organism called aspergillus fu- migatus, though several other aspergillus species may be incriminated.
Aspergillus is an oppor- tunist pathogen – it will take advantage of ideal growth conditions and multiply to huge numbers very rapidly by the devel- opment and dissemination of millions of spores into the environment, much like a mushroom.
If this bloom of spores is inhaled by chicks, the spores germinate in the lungs and air sacs and multiply into a solid nod- ule (called a granuloma), which physically occludes the bird’s breathing capac- ity, causing a characteristic open-mouthed gasping.
Occasionally, lesions can also be seen around the eye or nostrils and can even infect the brain.
Aspergillus is very com- mon in the environment, so exposure is always pos- sible.
Being a fungus, it pre- fers dark, warm, moist, protein-rich areas to mul- tiply and can readily do so in any suitable area.
Hatcheries are highly susceptible to aspergillus blooms because they have ideal growth conditions for the organism.
Moisture in fresh lit- ter provides ideal growth conditions, as do evapora- tive pads, dust accumula- tions inside heaters, feed silos and any other surface where mould can grow.
Aspergillosis presents as
a respiratory disease, with chicks showing consider- able difficulty breathing along with depression and inappetence.
Lesions in the lungs are typically small, greyish plaques or solid nodules within the air sacs and lung tissue.
Heavy infections are likely to lead to lesions in other organs including the liver and intestines.
Treatment of aspergillo- sis is difficult and often unrewarding, as it is un- responsive to antibiotics.
Fogging with an ap- proved germicide has been shown to signifi- cantly reduce mortalities
but strictly only with a product that is registered specifically for this form of treatment.
Fogging has the advan- tage of targeting the as- pergillus in the respirato- ry system where it resides.
Control of aspergillus centres around eliminat- ing any residual aspergil- lus from the environment around the chicks, start- ing at the breeder farm and working through the hatchery to the broiler or rearing shed.
Meticulous hygiene and sanitation using a ger- micide registered for use against fungal spores is recommended to reduce
the burden on chicks.
It is important to use sanitisers that are regis- tered for fungal control as the vegetative spores in the environment are very hardy and resistant to many of the commonly
used sanitisers.
Avoiding mouldy or wet
litter is an important pre- ventative step.
Mouldy feed is anoth- er major risk factor and therefore silos must be maintained to avoid water ingress.
Cool pads must also be cleaned and sanitised regularly because they are an ideal site for mould growth.
Vet’s
View
by ROD JENNER
New report calls for urgent action to avert AMR crisis
☛ from P1
and plant health, as well
as the food, animal feed, trade, development and environment sectors, to formulate a blueprint for the fight against antimi- crobial resistance.
This report reflects a renewed commitment to collaborative action at the global level by the World Food and Agricul- ture Organization of the UN, the World Organisa- tion for Animal Health (OIE) and World Health Organization.
FAO Director-General José Graziano da Silva said, “The report’s rec- ommendations recog- nise antimicrobials are critical to safeguard food production, safety and trade, as well as human and animal health, and it clearly promotes respon- sible use across sectors.”
“Countries can foster sustainable food sys- tems and farming prac- tices that reduce the risk of antimicrobial resistance by working together to promote vi- able alternatives to an-
timicrobial use, as laid out in the report’s rec- ommendations.”
OIE Director-General Dr Monique Eloit said, “Antimicrobial resistance must be addressed urgent- ly, through a One Health approach involving bold, long-term commitments from governments and other stakeholders, sup- ported by the internation- al organisations.”
“This report dem- onstrates the level of commitment and co- ordination that will be required as we face this
global challenge to pub- lic health, animal health and welfare and food se- curity.
“We must all play our part in ensuring future access to and efficacy of these essential medi- cines.”
WHO Director-Gener- al and IACG Co-Chair Dr Tedros Adhanom Ghebreyesus said, “We are at a critical point in the fight to protect some of our most essential medicines.”
“This report makes con- crete recommendations
that could save thousands of lives every year.”
The report highlights the need for co-ordinated and intensive efforts to overcome antimicrobial resistance: a major bar- rier to the achievement of many of the UN Sus- tainable Development Goals, including uni- versal health coverage, secure and safe food, sustainable farming sys- tems and clean water and sanitation.
For more information and to see the full report, visit oie.int
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