Will African swine fever cause disease in nursery pigs?
The impact of African swine fever is extremely powerful, and I believe many friends still have not recovered from it even now. Today let us solve one question together: will nursery pigs develop African swine fever? Let us take a look!
1. Will nursery pigs develop African swine fever?
Nursery pigs will develop African swine fever. Compared with older sows, the probability of disease in nursery pigs is only delayed, not completely avoided.
2. Symptoms of African swine fever
1. The incubation period of natural infection is 5 to 9 days, often shorter, while experimental clinical infection is 2 to 5 days. At the onset of disease, body temperature rises to 41°C and lasts for about four days, until forty-eight hours before death, when the body temperature begins to fall, which is its characteristic.
2. At the same time, clinical symptoms do not appear until the body temperature falls, so this differs from classical swine fever, in which symptoms appear when body temperature rises. During the first three to four days of fever, pigs have no appetite and appear extremely weak. The pigs lie in the corner of the pen, and if forced up to move, they show extreme weakness and fatigue, especially in the hind limbs, rapid pulse, coughing, and respiratory rate increased by about one third, with obvious difficulty breathing, and serous or mucopurulent conjunctivitis.
3. Some strains cause bloody diarrhea and vomiting. Blood changes resemble those of classical swine fever. From three to five cases, a 50% decrease in white blood cell count is shown, and lymphocytes are also reduced. When body temperature rises, leukocytic anemia occurs. By the fourth day, the white blood cell count falls to 40% before it stops declining. An increase in immature neutrophils can also be observed. Death often occurs on the seventh day after fever, or only one or two days after symptoms appear.
That is where Tuliu.com has summarized and organized the related questions about African swine fever in nursery pigs for you today. We hope this article is helpful to you.