Causes and prevention of dyspepsia in broilers raising

Digestion and malabsorption in broiler chickens is not uncommon, mainly characterized by small feed particles remaining in the feces, reducing feed conversion rate, sometimes causing diarrhea or other secondary diseases, and increasing residual chicken. So how does it happen and how can it be prevented? On March 7, 2019, Guangdong Provincial Society of Animal Husbandry and Veterinary Waterfouls Professional Committee and Guangdong Provincial Poultry Industry Association held a forum on mycotoxin harm and prevention and control in Foshan. Bi Yingzuo, a professor from South China Agricultural University, made detailed prevention and control strategies for the disease.

The etiology is complicated and feed problem has great influence

Prof Biingzo says there are three main causes of indigestion and malabsorption in broilers.

1. Weather.

The disease occurred in March to June, the temperature difference between day and night is large, wet, poor management of cushion material.

2. Infectious factors.

If exointestinal solitary disease virus, coccidiosis, bacterial enteritis can cause this disease.

3. Non-infectious factors.

There are many such factors, mainly in the following categories:

(1) Rough grinding of feed; Broilers raised off the ground have never eaten sand, and the mechanical grinding effect is weakened.

(2) The feed material changed greatly, the quality of corn was poor, the formula structure was single, and there were anti-nutritional factors, such as protein inhibitors, non-starch polysaccharides and excessive use of miscellaneous meal, etc.

(3) the presence of biological amines in feed, such as fish and animal by-products caused by heat or bacterial decay.

(4) Toxic fat poisoning. It is mainly oleic acid which produces a lot of peroxides after rancidity and some oleic acid which decomposes oil. Feed added industrial fat (cow sebum) contains a lot of dioxins; Feed or grease contamination of lube oil or other mineral oil.

(5) Mycotoxin poisoning, especially aflatoxin, vomitoxin and fumarin, can directly damage the intestinal villi and affect the digestion and absorption of nutrients. The fatty acids in moldy feed are easily oxidized to free radicals, and at the same time reduce other nutrients.

In particular, Professor Biyingzo emphasized the situation of wet dung, and analyzed the reasons, the main genetic factors (Isa and Hysix are easier to pull wet dung than Hyland chicken); Intestinal osmotic pressure is high, calcium, chlorine, magnesium plasma excess; Chicken infected with spirochetes; Barley in the diet; Chicken drinking Doradol in high temperature season, soft stool in summer, enzyme activity decreased, low digestibility; Water quality is not good or long-term cleaning, nitrate, bacteria exceed the standard; And high dietary salt content.

Prevention and control requires a multi-pronged approach

In view of the fact that chicken intestines are relatively short, Professor Bi believes that the prevention and control of the disease should take a multi-pronged approach. In addition to immunization, efforts should be made in feed and management. Such as:

1, according to the infectious factors, take appropriate measures to prevent. If breed chicken is inoculated reovirus vaccine, have dysentery use antimicrobial drug, coccidiosis choose fight coccidiosis drug or vaccine. Use bacitracin zinc, enradamycin, lincolnamycin, Virginia toxin and so on to prevent and treat necrotizing enteritis.

2. Add probiotics and enzyme preparations to the feed, add disinfectant, and replace inorganic salts with organic trace elements.

3. Add sand (0.5%) to the feed from the chickens regularly.

4. The screen mesh of the crusher in the feed factory is changed to 2.5-3mm.

5, pay attention to heat prevention and cooling, reduce heat stress and control the amount of water.

Little bird person

The threat of mycotoxins and coccidioides should not be underestimated