Effects of Coccidia on Laying Hens
Release time:
Sep 16,2019
In recent years, the production scale of laying hens has accelerated rapidly, the use of advanced equipment and facilities has become more and more popular, and the number of single-building chickens has gradually increased. People have put all the focus of disease prevention and control on viral diseases, but ignored the loss of profits caused by coccidiosis.
In production, breeding front-line personnel often think that coccidiosis does not occur in caged laying hens. In fact, this is a misunderstanding, there is no cause of coccidia casualties or coccidia blood stool, red feces, etc., does not mean that there is no coccidia infection. In China, where there are chickens, there is coccidia, which is not easy to see through feces.
Laying hens multiple chronic intestinal coccidiosis, direct damage to the intestinal tract, resulting in intestinal mucosal epithelial cells, tissue shedding, affecting digestion and absorption function. The main hazards in production are:
Obstructed nutrient absorption and slow growth
Coccidia infection will damage the intestinal mucosa. In severe cases, the intestinal mucosa will fall off, and the damage to the intestinal villi will be especially serious. The digestion and absorption of feed nutrients will be limited. The chickens will show nutritional deficiencies and weakened production performance, such as egg production rate does not rise, less than the peak, eggshell quality is poor, etc. The weight of young chickens is not up to standard and the uniformity is poor.
Recurrent enteritis, unhealed for a long time
The consensus of academia and poultry industry is that coccidia is the main primary and predisposing factor causing clostridial enteritis. Related studies have also shown that coccidia directly destroys intestinal epithelial cells, stimulates intestinal mucus secretion, and creates excellent breeding conditions for the common bacteria-Clostridium perfringens in the posterior intestinal tract, thus causing secondary Clostridium enteritis. In recent years, laying hens "red manure" diarrhea serious trouble laying hens and even all poultry health.
Increase in farming costs and loss of profits
After infection with coccidia, intestinal mucosal damage, digestion and absorption disorders, nutrient loss, and feed costs increase; in addition, enteritis occurs repeatedly and treatment costs increase; there is also the destruction of intestinal mucosal barrier and the decline of body immunity, which is very important for the prevention and control of other diseases. Severe challenges; especially through drinking water to immunize Newcastle disease and other vaccines, the antibody level is not high or the immunity fails, the probability of virus disease is greatly increased, and the loss is increased.
Lack of treatment and increased risk
The detection of egg drug residues has risen to the focus of national attention, supervision and testing are frequent, and cases of fines and sentences are not uncommon. Once coccidiosis occurs during egg laying, the application of anticoccidial drugs is greatly restricted. Only traditional Chinese medicine can be used, with little effect, and sometimes it is necessary to use it.10More than days, more farms use30The chickens are still not getting better. At the same time, pesticide residues in Chinese herbal medicines are also a big hidden danger.
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