What does red skin in pigs indicate? Is it just a fever?
When it comes to pig skin redness, a slightly experienced farmer will say that the pig must have a fever. This is also true, but in order to completely cure the pig skin redness disease, it is necessary to fully understand what disease causes the pig. The skin is red, so it is better to prescribe the right medicine. Which pig diseases can cause red skin of pigs, friends should be cautious and do a good job of prevention!
Acute swine fever
is an acute, febrile and septic infectious disease of pigs caused by swine fever virus.
The diseased pigs showed sudden onset, high fever (41.0~42.5℃), large and dense bleeding spots on the mucous membrane and skin, which did not fade with acupressure, and small bleeding spots on the skin of the ears, inner limbs, abdomen and vulva, etc. . There are a lot of mucopurulent secretions in both eyes, and even the eyelids are stuck, the foreskin accumulates urine, initial constipation, and post-diarrhea. The course of disease is 1 to 3 days, and the morbidity and mortality are high.
2. Porcine Dermatitis Nephrotic Syndrome
This disease is caused by circovirus type, which mostly occurs in piglets of 12 to 14 weeks old, and is mainly an infectious disease with red papules on the skin.
Sick pigs manifested as anorexia, sluggishness, paleness, fever, conjunctivitis, dyspnea, diarrhea, and weight loss. Irregular erythema and papules appeared on the skin, first appearing on the rear quarter, limbs and abdomen of the pig, and then spreading to the chest, lower back and ears.
On the eyes, round or irregular red to purple spots and papules of different shades can be seen, which combine to form irregular plaques on the perineum and the ends of the extremities.
3. Porcine eperythrozoonosis is a schistosomiasis
caused by eperythrozoon parasitizing porcine red blood cells or plasma. The main transmission vectors are mosquitoes and blood-sucking arthropods, and the disease is most common in summer and autumn.
At the beginning of the disease, some pigs lost their appetite and were mentally sluggish. After 3 days, the appetite disappeared, the body temperature began to rise, and stayed at 41~42 ℃, serous secretions flowed out of the nasal cavity, and the conjunctiva was pale and anemia. Some pigs breathe faster, the feces are spherical, dry and hard with mucus and blood, the urine is less and yellow, and the water intake drops significantly.
After 5 days, the ears of the sick pigs changed from red to purple, and some sick pigs had paralysis of both hind limbs, red spots on the buttocks and back, and sometimes purulent secretions flowed from the nasal cavity. Soon the red dots on various parts of the body were connected into a whole, and the whole pig body was red.
With the aggravation of the disease, the urine changes from light yellow to dark yellow, red or even brown in severe cases, the blood is thin, the sick pigs are getting thinner and thinner, the visible mucous membranes are yellowed, the eye circles are black, and blue-purple spots appear on the ears and the inside of the limbs Or plaque, the body temperature drops to about 40 ℃, when it drops below 39 ℃, the pig is dying.
4. Porcine exudative dermatitis
Acute contact dermatitis of piglets caused by Staphylococcus suis infection (mostly occurring in suckling piglets and weaning piglets in farrowing houses) is characterized by systemic oil-like exudative dermatitis.
Piglets usually become ill 4 to 6 days after infection.
At first, inflammation and erythema appear on the skin around the eyes and on the cheeks of the head. Over time, a thin, gray-brown flake-like exudate appeared in the axilla and ribs, rich in lipids, and spread to the whole body in 3 to 5 days. There was continuous exudation of mucilage-like tissue fluid at the site of inflammation, foul odor, When it is sticky to the touch, the exudate sticks to dust, dander and dirt and solidifies into a gray or black crust like a tortoise back.
Severely infected piglets resemble black hedgehogs with standing coats, diarrhoea and weight loss, poor appetite, rapid weight loss, and death within 24 hours, usually within 3 to 10 days. Sick pigs do not show itching, and fever is not common.
The severity of the disease in littermates varies, and the growth of tolerant pigs is significantly slower.