The damage of parasites mainly includes the following aspects:
(1) Direct damage to parasites
A.Pilling the nutrition of pigs.
B. Toxin production.
C. Destroy the pig's body tissue.
D. Pigs develop discomfort.
E. The growth rate decreases.
F. Reduced feed utilization.
G. Death caused when severe.
H. susceptible to secondary bacterial infections.
I. It is difficult to diagnose the disease.
J. Increase the cost of medication.
(2) Low mortality causes neglect of deworming by pig farmers
Regardless of internal parasites or ectoparasites, the symptoms and hazards that they cause in the course of disease are gradual and slow, and generally do not come as violent or sudden as bacterial viral diseases. However, parasite infection can reduce the growth rate of finishing pigs by 8-15%, and the utilization rate of feed decreases by 13-25%, which has a great impact on economic efficiency.
(3) The presence of parasitic diseases makes pigs susceptible to bacterial diseases
Intestinal roundworm infections increase the incidence of bacterial enteritis. The migration of aphids into the lungs or a roundworm infection can aggravate the symptoms of PRDC (Respiratory Disease Syndrome). Aphid migration to the liver or Fasciola hepatica will reduce the detoxification of the liver, and even cause jaundice. The presence of earthworms may be susceptible to staphylococci, necrophagous bacteria, and the like.
(4) Parasitic infections increase clinical diagnosis difficulties
Aphid and nematode migration to the lungs or a roundworm infection can cause respiratory symptoms such as cough, asthma, and are easily confused with respiratory diseases caused by pathogenic microorganisms. Parasites caused by intestinal parasites and diarrhea caused by coccidia are easily confused with viral and bacterial diarrhea. The hindquarters of the kidney disease appear to be unable to bear heavy weight and walk swiftly, which is easily confused with nutritional deficiencies and rheumatism. The presence of rickets is easily confused with zinc deficiency and staphylococcal infection.
(5) The presence of parasitic diseases can cause difficulties in clinical medication
Due to the influence of habitual thinking, clinically there are diarrhea symptoms that immediately use antibacterial antispasmodic drugs; respiratory symptoms appear to be bacteria, viral infections often cause treatment is not timely, misdiagnosis.
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