Control and treatment of other swine diseases (2)

(7) lack of estrus

Anestrus, commonly known as non-estrus, refers to young sows aged 6-8 months or non-estrus 15 days after weaning.

Prevention and treatment:

1. Strengthen management, pay attention to the nutrition of breeding pigs, prevent breeding pigs from being too fat or too thin, and maintain good health.

2. To delay the puberty of young sows, transfer to other pens or places, increase contact with boars, and feed some green feed. Can also be a subcutaneous or intramuscular injection of pregnant horse blood (40-80 days pregnant horse blood) 10-20 ml or PMSG (pregnant horse serum gonadotropin) biological preparation 400-600 units to induce estrus and ovulation. HCG (chorionic gonadotropin) can also be injected intravenously or intramuscularly.

3. 15-25 ml of pregnant horse serum or whole blood was injected subcutaneously or intramuscularly into weaned sows, or 1000-1500 units of PMSG was injected intramuscularly for 1-2 times. In addition, HCG500-1000 units can be injected intravenously or intramuscularly, repeated once every 1-2 days.

4. Intravenous or intramuscular injection of FSH (follicle stimulating hormone) 100-300 units, once every other day, usually 3-4 times, can not only promote estrus and ovulation in sows, but also increase the conception rate and birth rate.

(8) miscarriage

The causes of abortion in sows are many and complicated, the most common ones are infectious (parvovirus, pseudorabies, porcine reproductive respiratory syndrome, Japanese encephalitis, classical swine fever, etc.), causing mass abortion, followed by parasitic diseases (toxoplasmosis, etc.), mycotoxins, nutrition, toxicity, harmful environment and mechanical damage.

Prevention and treatment:

1. Regular surveillance of STD abortion and parasitic STD abortion in pigs in order to timely vaccinate the vaccine and grasp the protection rate after vaccination.

2. The pig house should be ventilated and dry in summer to prevent high temperature and humidity, and to keep warm and cold in winter.

3. As breeder pigs are sensitive to mycotoxins, it is strictly forbidden to feed moldy and toxic feed. It is suggested that demycin (mycotoxin adsorbent) should be added to breeding pig feed.

4. for sows with signs of abortion, progesterone injection 15-25 mg was injected intramuscularly to protect the fetus. If it is ineffective, estradiol benzoate 3-10 mg or diethylstilbestrol 3-10 mg intramuscular injection can be used to promote its outflow and prevent stillbirth from stagnation.

(9) dystocia

The incidence of dystocia in sows is lower than that in other livestock, and there are three types of dystocia: weak fertility, narrow birth canal and abnormal fetus.

Prevention and treatment:

1. If the productivity is weak, you can choose Pituitrin or oxytocin 10-20 units, intramuscular injection once per hour, generally 1-3 times. It is necessary to prevent the use of large doses, especially when the cervix is not open.

2. Infuse a large amount of lubricant into the birth canal to facilitate correction and pull out of the fetus. When correcting abnormal fetal posture, the fetus should be pushed back to the uterus during the interval of contraction of sows to facilitate operation. If the fetus is too large, it can be pulled out with bare hands or with an obstetrical noose.

3. When the midwifery is delayed, the malformed fetus is too large, and the fetus cannot be broken, laparotomy should be performed in time.