What are the early symptoms of African swine fever in sows?
Among pigs, any female pig of any age that has farrowed is called a sow. Today we introduce the early symptoms of African swine fever in sows.
1. Early symptoms of African swine fever in sows
Early symptoms include elevated body temperature, difficulty breathing, increased heart rate, coughing, cyanosis of the skin, and reduced appetite.
2. Differences between African swine fever and ordinary swine fever
1. Transmission characteristics
Swine fever: it spreads only through contact, and infection occurs only under certain conditions; pigs of almost any age and any size can be infected.
African swine fever: it is not transmitted only through contact; it can also spread through various insects and pests.
2. Disease onset characteristics
Swine fever: differences in virus strains directly determine the severity of the disease; swine fever outbreaks mainly occur in various small and medium-sized farms in our country, but they basically do not spread to the outside, and pigs vaccinated before rearing rarely develop the disease.
African swine fever: it has a wide spread range, mainly because its transmission media are too extensive; when the virus strain is highly virulent, it can cause all infected pigs to die within one week, and there is no effective vaccine for prevention and control.
3. Symptoms of onset
Swine fever: after a pig becomes ill, it shows listlessness, a major reduction in appetite, and a rapid rise in body temperature. Various neurological symptoms appear, such as weak legs, inability to stand or walk, and paralysis.
African swine fever: the incubation period of African swine fever is about 1 week; after onset, the pig's body temperature soars, reaching 40 degrees or even higher. Coughing, runny nose and tears, rapid breathing, and various other respiratory problems also appear, causing pregnant sows to give birth prematurely or miscarry, and the mortality rate can reach 100 percent.
There are many breeds of domestic sows, such as Taihu pig, Landrace, Large White, Erhualian, Jinhua pig, Duroc, Pietrain, Rongchang pig, and others.