- Facial Eczema Information
- Recommended product range
- Directions for use
- Facial Eczema Risk and Incidence Reports
For more information on Facial Eczema please see the Dairy Australia website Facial Eczema (FE) is caused by ingestion of spores of the fungus Pithomyces chartarum. These spores release a mycotoxin called sporidesmin which causes damage to the liver, bladder and mammary gland. The fungus grows on most pasture plants, but has a preference for perennial ryegrass. It favours dead pasture litter at the base of plants and animals grazing short pasture at high stocking rates are at greatest risk. Freshly produced spores are the most toxic but can lose their toxicity within 1-2 weeks if fungal growth stops after a change in the weather. Outbreaks can occur in warm, humid weather with light rain (or irrigation) which is suitable for spore production. Autumn is a high risk period after a long, dry summer as pasture will be light and soil temperatures will still be warm enough for rapid pasture growth. Photosensitisation resembling ‘sunburn’, is a common sign frequently affecting the non-pigmented areas of skin. This occurs ~2 weeks after exposure to sporidesmin. The skin of the face, ears, teats, and vulva, are often affected becoming reddened, then crusty and dark. Eventually the skin peels off leaving large raw areas susceptible to infections and flystrike. Cows may be restless, seek shade and lick or rub affected areas. If exposure is sudden, they may collapse in extreme pain. However, in most outbreaks the majority of animals show little or no visible skin lesions, but have suffered liver damage. For every cow in a herd with skin lesions, up to 10 or more cows may be affected sub-clinically. It is the 80% of cows without skin lesions, but with liver damage, that contribute to the major economic losses. Deaths, reduced weight gain and poor reproductive performance contribute to economic losses. The udder and teats of lactating cows are often severely affected accompanied by a rapid drop in milk production. This may be temporary but in severe cases affected cows may dry off completely. There is no specific treatment for FE, and any treatment is considered to be symptomatic. Affected animals should be housed during daylight and allowed to graze at night. At the very least they must be given access to shelter to help prevent further skin lesions and allow existing lesions to heal while the liver regenerates. Areas where skin is peeling should be dressed with sun-blocking ointments. Please call your vet clinic if you suspect FE to discuss supportive treatment. Oral zinc can be used to reduce the impact of FE but must be administered prior to exposure to sporidesmin. Zinc does not have a therapeutic effect once cows are already showing signs of FE as it cannot reverse existing liver damage. Daily drenching, in-feed and drinking water have been used to administer zinc. The Agritrade zinc bolus provides consistent and slow release of zinc into the rumen for 4-5 weeks. There are potential side effects with prolonged zinc dosing and these should be discussed with your veterinarian.During high risk periods or an outbreak, the following can help to minimise the risk of Facial Eczema: Call your vet clinic to discuss further prevention and control options for FE with your veterinarian. Facial Eczema Information
What causes Facial Eczema?
When does FE occur?
Signs of FE
Treatment, prevention and control.
Reference: “A Review of Facial Eczema”, Dairy Australia 2013.
The Agritrade zinc bolus slowly and consistently releases a daily dose of zinc into the rumen to protect cattle against Facial Eczema for 4-5 weeks. When the risk of Facial Eczema is high, it is recommended to give the Agritrade zinc bolus every 4 weeks; when the risk is low the dose interval can be extended to 5 weeks. The Agritrade zinc bolus comes in a range of sizes to accommodate cattle of different size and body weight. It is important to weigh some cattle in the group, using static weigh scales or estimate body weight using a weigh tape, prior to dosing. Always dose to the heaviest animal in the group. For larger cattle two Agritrade zinc boluses can be used in combination to provide protection:Agritrade zinc bolus product range
2 x 250–400kg Cattle Capsules
500-800kg LWT
Weigh (or estimate body weight using a weigh tape) some representative animals from the group to determine which size Agtritrade zinc bolus is appropriate. Always dose to the heaviest animals in the mob unless there is a wide variation, in which case different size boluses will be required. For larger cattle two Agritrade zinc boluses can be used in combination to provide protection for larger weight ranges as follows:Agritrade zinc bolus directions for use
Using the correct applicator gun administer the bolus or boluses orally every 4 weeks during high risk Facial Eczema periods. This interval can be extended to 5 weeks during low risk periods.
2 x 250–400kg capsules /500–800kgAdministering Agritrade zinc bolus
Important Notes
Facial Eczema Information
For more information on Facial Eczema please see the Dairy Australia website Facial Eczema (FE) is caused by ingestion of spores of the fungus Pithomyces chartarum. These spores release a mycotoxin called sporidesmin which causes damage to the liver, bladder and mammary gland. The fungus grows on most pasture plants, but has a preference for perennial ryegrass. It favours dead pasture litter at the base of plants and animals grazing short pasture at high stocking rates are at greatest risk. Freshly produced spores are the most toxic but can lose their toxicity within 1-2 weeks if fungal growth stops after a change in the weather. Outbreaks can occur in warm, humid weather with light rain (or irrigation) which is suitable for spore production. Autumn is a high risk period after a long, dry summer as pasture will be light and soil temperatures will still be warm enough for rapid pasture growth. Photosensitisation resembling ‘sunburn’, is a common sign frequently affecting the non-pigmented areas of skin. This occurs ~2 weeks after exposure to sporidesmin. The skin of the face, ears, teats, and vulva, are often affected becoming reddened, then crusty and dark. Eventually the skin peels off leaving large raw areas susceptible to infections and flystrike. Cows may be restless, seek shade and lick or rub affected areas. If exposure is sudden, they may collapse in extreme pain. However, in most outbreaks the majority of animals show little or no visible skin lesions, but have suffered liver damage. For every cow in a herd with skin lesions, up to 10 or more cows may be affected sub-clinically. It is the 80% of cows without skin lesions, but with liver damage, that contribute to the major economic losses. Deaths, reduced weight gain and poor reproductive performance contribute to economic losses. The udder and teats of lactating cows are often severely affected accompanied by a rapid drop in milk production. This may be temporary but in severe cases affected cows may dry off completely. There is no specific treatment for FE, and any treatment is considered to be symptomatic. Affected animals should be housed during daylight and allowed to graze at night. At the very least they must be given access to shelter to help prevent further skin lesions and allow existing lesions to heal while the liver regenerates. Areas where skin is peeling should be dressed with sun-blocking ointments. Please call your vet clinic if you suspect FE to discuss supportive treatment. Oral zinc can be used to reduce the impact of FE but must be administered prior to exposure to sporidesmin. Zinc does not have a therapeutic effect once cows are already showing signs of FE as it cannot reverse existing liver damage. Daily drenching, in-feed and drinking water have been used to administer zinc. The Agritrade zinc bolus provides consistent and slow release of zinc into the rumen for 4-5 weeks. There are potential side effects with prolonged zinc dosing and these should be discussed with your veterinarian.During high risk periods or an outbreak, the following can help to minimise the risk of Facial Eczema: Call your vet clinic to discuss further prevention and control options for FE with your veterinarian. Facial Eczema Information
What causes Facial Eczema?
When does FE occur?
Signs of FE
Treatment, prevention and control.
Reference: “A Review of Facial Eczema”, Dairy Australia 2013.
Recommended product range
The Agritrade zinc bolus slowly and consistently releases a daily dose of zinc into the rumen to protect cattle against Facial Eczema for 4-5 weeks. When the risk of Facial Eczema is high, it is recommended to give the Agritrade zinc bolus every 4 weeks; when the risk is low the dose interval can be extended to 5 weeks. The Agritrade zinc bolus comes in a range of sizes to accommodate cattle of different size and body weight. It is important to weigh some cattle in the group, using static weigh scales or estimate body weight using a weigh tape, prior to dosing. Always dose to the heaviest animal in the group. For larger cattle two Agritrade zinc boluses can be used in combination to provide protection:Agritrade zinc bolus product range
2 x 250–400kg Cattle Capsules
500-800kg LWT
Directions for use
Weigh (or estimate body weight using a weigh tape) some representative animals from the group to determine which size Agtritrade zinc bolus is appropriate. Always dose to the heaviest animals in the mob unless there is a wide variation, in which case different size boluses will be required. For larger cattle two Agritrade zinc boluses can be used in combination to provide protection for larger weight ranges as follows:Agritrade zinc bolus directions for use
Using the correct applicator gun administer the bolus or boluses orally every 4 weeks during high risk Facial Eczema periods. This interval can be extended to 5 weeks during low risk periods.
2 x 250–400kg capsules /500–800kgAdministering Agritrade zinc bolus
Important Notes