How Many Days of Fever Before Death in Pigs with African Swine Fever
African swine fever attracts a great deal of attention, and many friends are particularly troubled by the problem of swine fever. Because no drug has been developed yet, everyone is very anxious. So how many days of fever before death in African swine fever? Let's take a look!
1. How Many Days of Fever Before Death in African Swine Fever
After fever symptoms appear in African swine fever, death usually occurs within seven days. Different problems must be treated differently; each pig has a different probability of developing the disease, and the symptoms also differ.
2. Symptoms of African Swine Fever
1. The incubation period for natural infection is 5 to 9 days, often shorter, while for experimental clinical infection it is 2 to 5 days. When the disease strikes, body temperature rises to 41 degrees C and lasts about four days, until forty-eight hours before death, when the body temperature begins to fall, which is its characteristic feature.
2. At the same time, clinical symptoms do not appear until the body temperature falls, which differs from classical swine fever, in which symptoms appear when the body temperature rises. During the first three to four days of fever, the pig has no appetite and appears extremely weak; the pig lies in the corner of the pen, and if forced to get up and walk, it shows extreme fatigue and weakness, especially in the hind limbs, with a rapid pulse, coughing, and a respiratory rate about one third faster, showing difficulty breathing, and serous or mucopurulent conjunctivitis.
3. Some strains cause bloody diarrhea and vomiting, and blood changes resemble those of classical swine fever. Among three to five cases, a 50% reduction in white blood cell count is shown, and lymphocytes are likewise reduced; when body temperature rises, leukocytic anemia occurs, and by the fourth day the white blood cell count drops to 40% before it stops falling. An increase in immature neutrophil count can also be observed. Death often occurs on the seventh day after fever begins, or just one or two days after symptoms appear.
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