What are the main symptoms of African swine fever in sows?

African swine fever in sows.

Initial symptoms include increased body temperature and dyspnea.

Rapid heartbeat, coughing.

Cyanosis is present.

as well as decreased appetite, among others. At first, the amount of food eaten by the sows decreases, and after a period of time, the sows basically do not eat. African swine fever can not only be transmitted by contact, but also can be transmitted through various insects, pests and other vectors, and the scope of transmission is relatively wide.

1. Obvious symptoms in the early stage of African swine fever in sows.

1. The obvious symptoms in the early stage of African swine fever in sows include increased body temperature, dyspnea, rapid heartbeat, cough, cyanosis and decreased appetite. After contracting African swine fever, a typical symptom of sows is high fever and general temperature.

It will go up to around 40.

2. At the beginning, the amount of food of the sow will decrease, and after a period of time, the sow will basically not eat. Sows with non-plague may also have bloody stools.

Other symptoms such as vomiting, diarrhea, difficulty breathing, and purple ears.

3. African swine fever can not only be transmitted by contact, but also through various insects and pests. Moreover, the disease spreads widely, mainly because its transmission medium is too widespread, and when the disease is more severe, all the pigs will die within a week.

4. African swine fever is an acute, hemorrhagic and virulent infectious disease caused by African swine fever virus infecting domestic pigs and various wild boars. The onset of the disease is short, and the mortality rate of acute infection is as high as 100%.

2. How long is the incubation period of African swine fever?

1. The incubation period of African swine fever is generally about 4-19 days, and the length of the incubation period is related to the virulence of African swine fever virus and the disease resistance of infected pigs.

2. At present, there is no vaccine that can effectively prevent African swine fever in the world, but high temperature and disinfectant.

It can effectively kill the virus, so doing a good job in farm biosecurity protection is the key to preventing and controlling African swine fever.

3. It is necessary to strictly control the entry of personnel, vehicles and susceptible animals into the farm, and strictly disinfect the personnel, vehicles and articles entering and leaving the farm and its production area.

4. Raise pigs as close as possible, take isolation and protective measures, and try to avoid contact with wild boars. Swill cannot be used.

Or feed the pigs with meal waste.

5. Actively cooperate with local animal disease prevention and control institutions to carry out disease monitoring and investigation, especially in the event of swine fever vaccine immunization failure, unexplained death and other phenomena, it should be reported to the local veterinary department in a timely manner.

The symptoms manifested are redness, and then vomiting and anorexia, or diarrhea and abdominal pain, the body temperature will rise, and the body will be very weak.

The sow does not eat, does not drink water, vomits, has purple ears, pulls out the poop that is red, and the height and temperature of the pig will rise.

There will be difficulty breathing, increased body temperature, coughing, cyanosis, loss of appetite, and rapid heartbeat.

There is an environment in which it is difficult to breathe, body temperature is lowered, coughing, cyanosis appears, loss of appetite, and rapid heartbeat.

3 All symptoms: the incubation period of natural infection is 5 9 days, often shorter, and the clinical experimental infection is 2 5 days, the body temperature rises to 41 at the onset, which lasts for about four days, until 48 hours before death, the body temperature begins to drop as its characteristics, and the clinical symptoms are not shown until the body temperature drops, so the symptoms are different from the symptoms when the body temperature of swine fever rises.

During the three to four days of fever, the pig has no appetite, showing extreme vulnerability, the pig only lies in the corner of the house, forced to drive it to move, it shows extreme fatigue, especially the hind limbs, fast pulse, cough, breathing fast about one-third, showing dyspnea, serous or mucopurulent conjunctivitis, some strains can cause bloody diarrhea, vomiting, blood changes like swine fever.

From three to five cases, it was shown that there was a decrease in the number of white blood cells by 50%, and the number of lymphocytes was also reduced, leukocyte anemia occurred when the body temperature was elevated, and the number of leukocytes decreased to 40% on the fourth day.

He died in a day or two.

Prevention and control: strictly control the entry of personnel, vehicles and susceptible animals into the farm; Personnel, vehicles, and items entering and leaving the farm and its production area should strictly implement disinfection and other measures. Feed pigs as close as possible, take isolation and protective measures, and try to avoid contact with wild boars and soft ticks with blunt edges.

It is strictly forbidden to feed pigs with swill or meal waste. Actively cooperate with local animal disease prevention and control institutions to carry out disease monitoring and investigation, especially in the event of swine fever vaccine immunization failure, unexplained death and other phenomena, should be reported to the local veterinary department in a timely manner.

Pigs with non-plague symptoms must be isolated to avoid infecting other healthy pigs. To disinfect the pig house frequently, glutaraldehyde, potassium persulfate, our household is potassium persulfate of Chinese animals, and the anti-virus effect is nothing to say. Disinfection is in place, isolation is timely, and it will not cause large-scale infection.

Most acute: Mortality can be as high as 100% within the first week of infection. This manifestation is caused by highly virulent strains, and sudden death is common. The disease progresses rapidly and most pigs do not show clinical signs until they die.

Acute: it is a common form of ASFV outbreak. Mortality is as high as 100%, but disease progression is slower than in the most acute form, and it may take up to 3 weeks for the mortality rate to reach 100%.

The observed clinical signs are pronounced and severe. More precisely, fever, systemic hemorrhagic ** injury, respiratory distress, and hemorrhagic nasal discharge before death of the animal is seen. At autopsy, hemorrhagic lesions of multiple organs were seen, and enlargement of the kidneys, lymph nodes, and spleen was common, but not in all infected pigs.

Subacute: clinical symptoms are similar to those of acute but less severe. Mortality can reach 30-70% within 3-4 weeks of infection. Disease progression is significantly slower than acute onset, and clinical symptoms may not be as pronounced as expected.

Chronic: Symptoms are varied, including anorexia, weight loss, bloody diarrhoea, respiratory distress, and arthritis. The mortality rate remained below 20%, and most animals survived and became spreaders of the virus in the following months.

The clinical manifestations of the acute type of African swine fever are high fever 40 42, mortality rate of 90% 100%, anorexia, reluctance to move, redness, vomiting, nasal bleeding, bloody stool, constipation, etc. Pregnant sows are prone to miscarriage with neurological symptoms.

The clinical manifestations of the subacute type of African swine fever are similar to those of the acute type, with moderate fever and decreased appetite in sick pigs. ** Bleeding and edema, death 7-20 days after infection, case fatality rate 30% 70%.

Pigs with chronic ASF have lost weight, have poor growth, present intermittent fever, necrosis or ulceration of the ears, abdomen and inner thighs**, swollen joints, and respiratory symptoms can occur in infected pigs.

For suspected and diseased pigs, we give priority to testing to achieve the purpose of accurate tooth extraction, and I personally recommend using the Dahuanong African Swine Fever Fluorescent PCR Detection Kit. I hope to accept my answer, I would appreciate it. If there is anything else you need, you can ask, thank you!

Diarrhea and vomiting may occur, and neurological symptoms may occur.

Due to the different virulence of the strains, there are several types of clinical manifestations.

The most acute ones die suddenly without obvious symptoms. The acute manifestations are increased body temperature, not eating, redness, diarrhea or vomiting, pregnant sows will basically have abortion, and some will also have neurological symptoms.

If the sow has these symptoms, it is suspected that it may be African swine fever, and in this case, do not give the injection, the sow itself is under stress, and a shot may aggravate the stress and lead to death.

The best way is to isolate and disinfect the sick pigs as soon as possible, and if you want to know the exact results, you can do antibody tests such as fluorescent antibody tests, but you must do it in a provincial laboratory that meets biosafety requirements.

According to the data reported by the Ministry of Agriculture, since the second half of this year, the frequency of African swine fever has decreased much compared with last year, but there are still areas where it occurs.

Entering October, there were two African swine fever epidemics in half a month, one was in Minxian County, Gansu Province, and the other was Bobai, Guangxi.

The incubation period of African swine fever is generally 5 19 days, and there are many kinds of pathogenic strains, and the highly virulent strains will kill pigs in a short period of time, and the mortality rate is basically 100%.

The mortality rate of moderately virulent strains is generally 30% to 50%, and the low independent strains will cause a small number of pig deaths.

After the outbreak of African swine fever in China last year, the fatality rate was generally 100%, indicating that it was a strong strain in China at the beginning.

The African swine fever epidemic has occurred for more than a year, many farmers have summed up their own set of prevention and control methods in the battle of wits and courage with it, and found that a small number of pigs did not die after getting sick, of course, these pigs did not carry out the diagnosis of African swine fever, but suspected, especially sows, some sows will be aborted after infection, but the sows did not die.

If a pig is infected with African swine fever, will the pig still eat after the fever is injected? One of the typical clinical symptoms of African swine fever is fever, and generally fever to Celsius, the first injection after fever will have a good fever-reducing effect, generally 2-3 hours after the injection will be partially recovered, the sick pig will get up to eat, but after the antipyretic drug has passed, it will have fever again, and then there will be two situations when the antipyretic injection is taken.

One is that the body temperature will drop again after beating, and the feeding will resume, and this state will continue for 3-4 days until the symptoms of the sick pig worsen and cause death. The other is that after the beating, he has a low temperature and dies quickly. That is to say, in either case, if the method of intramuscular injection of fever reduction injection is not adopted, the sick pigs will eventually die, so when there are suspected symptoms of African swine fever, the author recommends that the elimination be done as soon as possible, and for the problem of African swine fever, "I would rather kill a thousand by mistake than let go of one"!

At present, there is still no effective drug to prevent African swine fever, and of course there is no effective drug to **, so as long as there are suspected symptoms of African swine fever, then it can only be culled and eliminated. The most important thing after the outbreak of African swine fever is to respond quickly, make a preliminary diagnosis in a timely manner, and treat suspected cases urgently without delay. In particular, sows reared in troughs can easily spread quickly due to saliva poisoning, leading to outbreaks on the farm.

At present, the more recommended way is to pull out the tooth elimination, if the disease is the sow, then not only need to eliminate the diseased pig, the two pigs around the disease also need to be eliminated in time; If the diseased pigs are commercial pigs, then it is necessary to eliminate all the pigs in the diseased column and the left and right columns, so that the pig farm can be stabilized and the loss can be minimized.

There are varying degrees of bleeding from the whole body**, serous membranes, mucous membranes, and internal organs. The lymph nodes of the whole body are swollen, juicy, congested, bleeding, purple-black in appearance, marble-like in section, pale in color in the kidneys, needle-tip to millet-shaped bleeding points in the cortex, and cold in the spleen, which is mostly seen at the edges, and small black and purple patches in color, and bleeding from the laryngeal mucosa and tonsils. The bladder mucosa has scattered bleeding spots.

The gastric and intestinal mucosa is catarrhally inflamed. A button-shaped ulcer forms at the ileocecal valve of the large intestine.

African swine fever is generally classified as very acute, acute, subacute and chronic.

Very acute African swine fever.

The sick pig lost appetite, fatigue and had a high fever of 41-42 and died suddenly without any obvious symptoms.

Acute African swine fever.

1. Clinical manifestations.

Sick pigs are drowsy and sleepy, shortness of breath, loss of appetite accompanied by 40-42 high temperatures, usually die within one to two weeks, the clinical symptoms of sick pigs are mostly manifested as: chest, abdomen, tail, perineum and legs ** redness, eyes and nose secretions flow out, diarrhea or constipation symptoms accompanied by vomiting, pregnant sows abortion, etc.

2. Autopsy symptoms.

Subacute African swine fever.

Infected with subacute non-plague pigs usually die within 7-20 days, the lethality rate ranges from 30% to 70%, the clinical symptoms of subacute non-plague are similar to the clinical symptoms of acute non-plague, the main lesions are hemorrhage and hematoma, pigs will only have different degrees of fever, manifested as depression, loss of appetite, pneumonia or respiratory symptoms may occur, the key of sick pigs is usually swelled.

Chronic African swine fever.

The clinical symptoms of this type of non-plague are mild fever, accompanied by moderate or severe joint swelling, mild symptoms of the respiratory tract, and usually erythema, necrosis, and protrusions. The autopsy showed pneumonia and fibrous pericarditis with caseous necrosis in the lungs, as well as lymphadenopathy and local bleeding in the sick pigs.

Because the clinical manifestations of non-plague are similar to some other diseases, it is necessary to be cautious in diagnosis and judgment.