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Some articles and publications posted to this website refer to Intervet/Schering-Plough Animal Health, which has since changed its name to Merck Animal Health.

Scientist identifies new Eimeria species

A new species of coccidia has been discovered and named by a poultry technical service specialist at Merck Animal Health.
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Scientist identifies new Eimeria species
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  • Controlling enteritis without drugs
    • Year-round coccidiosis control by vaccination enabled Fischer Family Poultry to take another step to reduce medication use in its broilers. In response to a market opportunity, the company removed all antibiotics from broiler feed and water.


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  • Canadian producer reaps benefits of coccidiosis va...
    • In the early 2000s, Fischer Family Poultry, Ltd., Ontario, Canada, devised a simple plan for breathing new life into its coccidiosis-control program: Give the resistance-prone, in-feed anticoccidials a rest and use a live coccidiosis vaccine for three successive cycles. Then, when winter arrives, switch back to the medication program for three more cycles and continue with that rotation.


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  • New-generation coccidiosis vaccine for layers appr...
    • Coccivac-D2, a new-generation coccidiosis vaccine for chickens, has been approved by USDA and will replace Coccivac-D.
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  • Field experience shows perils of late coccidiosis ...
    • Real-world experience is corroborating research indicating that a coccidiosis challenge late during the production cycle takes a far more serious toll on broilers and the producer’s wallet than an early coccidiosis challenge.
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  • Late coccidiosis challenge has ‘profound’ impa...
    • A coccidiosis challenge late in the production cycle has a profound, negative effect on energy utilization, flock performance and profitability — even when coccidial gut lesions are minor, indicates expansive research by a US nutritionist.
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  • Coccidiosis vaccination is put to the test
    • It was in 2007 when Alain Coeudevez, manager of the Ets Michel “Certi’ Ferme” poultry line, decided to investigate the possibility of vaccinating broilers against coccidiosis.
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  • Making coccidiosis vaccination work in dry climates
    • Coccidiosis vaccination has been widely used with good success in many broiler-breeder operations. In dry climates, however, it’s been known to present some challenges because live-oocyst vaccines need moisture to cycle. Alberta’s Jenny A. Fricke, DVM, has found a solution.

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  • Canadian producer reaps benefits of coccidiosis va...
    • In the early 2000s, Fischer Family Poultry, Ltd., Ontario, Canada, devised a simple plan for breathing new life into its coccidiosis-control program: Give the resistance-prone, in-feed anticoccidials a rest and use a live coccidiosis vaccine for three successive cycles. Then, when winter arrives, switch back to the medication program for three more cycles and continue with that rotation.


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  • Vaccination: It only gets better
    • Back in 2006, when Santiago Bellés, DVM, started vaccinating broiler flocks for coccidiosis, all he wanted to do was to find a new tool for managing the ubiquitous disease.
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  • Fiber trays promote oocyst recycling in coccidiosi...
    • Preliminary research by Canadian investigators suggests there’s an easy way to promote coccidial cycling and further increase coccidiosis vaccine efficacy in tier-caged pullets. “It appears to be as simple as covering 40% of the wire floor with molded fiber trays...."
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  • Scientist identifies new Eimeria species
    • A new species of coccidia has been discovered and named by a poultry technical service specialist at Merck Animal Health.
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  • Coccidiosis vaccination: Making a good thing even ...
    • Two veterinarians with expertise in coccidiosis team up to share their latest ideas and strategies for managing the disease more effectively and profitably.
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  • Coccidiosis
    • Coccidiosis is an intestinal disease affecting poultry flocks around the world. It is caused by the protozoan parasite Eimeria.
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  • Necrotic enteritis
    • Necrotic enteritis (NE) is a leading intestinal health problem in broiler flocks.
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  • Gangrenous dermatitis
    • Gangrenous dermatitis is a subcutaneous infection in poultry. It is often due to clostridial organisms of various species, but can also be caused by Escherichia coli and staphylococcus.
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  • Cellulitis
    • Cellulitis is an inflammation of connective tissues that usually occurs between the skin and muscles or between the muscles themselves.
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  • Reovirus
    • Reoviruses are widespread in nature. First isolated from chickens in the 1950s, avian reoviruses have been associated with numerous conditions.
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  • Runting and stunting syndrome (RSS)
    • RSS is a condition that afflicts young chickens and turkeys. It is manifested by uneven growth, stunting or runting of growth, poor or abnormal feathering, lesions, diarrhea and a lack of pigmentation in the skin, feet or beak.
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  • Salmonella
    • Salmonella is not a health problem for poultry, but it is a leading cause of human food poisoning.
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  • Roundworms
    • Roundworms. or ascarids, can occur in both chickens and turkeys. Heavily infected birds may appear droopy or emaciated and may experience diarrhea.
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  • Environment
    • Environmental conditions greatly influence the health and productivity of poultry. Brooders require the proper temperature, humidity, ventilation, lighting and litter management to grow well.
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  • Nutrition
    • Producers know that good nutrition is essential to maximize a flock’s potential. Today, nutrition is also playing an increasing role in stimulating immunity and fighting common gut diseases.
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  • Antibiotic therapy
    • Reduced sensitivity to some antibiotics, plus the concern that feeding these drugs to poultry and livestock may increase the risk for antibiotic-resistant infections in people, is initiating significant changes in the poultry industry.


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