Product updates and industry trends

Spray cabinet results in more uniform coverage and protection.

Coccivac-T, a live-oocyst vaccine used for many years to protect turkeys against coccidiosis, has been approved for convenient spray cabinet administration in the United States.

The spray cabinet results in more uniform protection against coccidiosis than other administration methods, as well as cost-savings for turkey producers, says Dr. Lanny Howell, technical services veterinarian for Schering-Plough Animal Health.

"The vaccine's sister product, Coccivac-B, grew significantly in the broiler market after it was approved for spray cabinet administration in 1997," he adds. "We expect to see a comparable rate of growth in the turkey industry as more producers discover the convenience and dependability of this method."

The efficacy of spray cabinet administration in turkeys was clearly demonstrated in a recent study by a private research facility. All birds in the study came from the same breeder flock. There were 30 birds per pen and 10 pens per treatment. One group was vaccinated with Coccivac-T in the hatchery at day 1 and the other received the in-feed coccidiostat monensin sodium from day 1 to completion of the trial at 14 weeks. The level of monensin varied with each feed change. Both groups received virginiamycin at 20 gms/ton of feed throughout the trial. All the birds were weighed by pen at 7, 8, 10, 12 and 14 weeks of age.

According to Howell, the group vaccinated with Coccivac-T had significantly higher average live weights compared with the hens receiving monensin. Feed conversion adjusted for mortality was not statistically different between the two treatment groups.

Furthermore, the total feed cost to produce a pound of bird was also significantly lower for hens receiving Coccivac-T, he says. The feed cost savings was calculated to be 0.7 cent (US) per pound of body weight, which equates to a savings of over 11 cents per hen (0.7 cent x 16 lbs).

Field trials involving nearly 20,000 doses of Coccivac-T administered to day-old poults demonstrate that the vaccine is safe when administered by spray cabinet. In the trial, 19,382 birds in two barns received the vaccine via coarse spray administration at day one of age. The birds were then monitored for 28 days.

"There were no untoward effects caused by coarse spraying the vaccine in the hatchery," he says. "In fact, when compared with the history at the farm, mortality was lower and weight and weight uniformity was above average in Coccivac-T-vaccinated birds."

CocciForum Symposium Provides New Ideas

Schering-Plough Animal Health continued its successful series of CocciForum symposia with a three-day meeting exclusively for poultry veterinarians.

More than 40 consultants came to the old silver mining town of Durango, Colo., to learn more about new strategies for coccidiosis management. Speakers included Dr. Harry Danforth of the USDA; Dr. David Chapman of the University of Arkansas; Dr. Greg Mathis of Athens, Ga.; Dr. Steve Roney of Sanderson Farms, Laurel, Miss.; and Dr. Phil Hargis of Bates, Ark. Schering-Plough Animal Health's Drs. Charlie Broussard and Linnea Newman also presented new information from field trials.

In addition, Schering- Plough Animal Health used the conference to brief veterinarians about "Georgia 98," a new infectious bronchitis serotype that has been reported in U.S. broilers. Dr. Mark Jackwood of the University of Georgia presented his latest work with the new strain, which demonstrated that Georgia 98 is a variant of 072, the serotype found in Shorbron®-D, which is currently the vaccine of choice.

A proceedings summarizing the Durango presentations is now available. For a free copy, contact your Schering-Plough Animal Health representative or email phyllis.middleton@

Source: CocciForum Issue No.2, Schering-Plough Animal Health.

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