What are the symptoms of porcine reproductive and respiratory syndrome?

Porcine reproductive and respiratory syndrome is a rather troublesome pig disease, and when it strikes it is a torment for both the pigs and the farmers. This disease is somewhat infectious, and if you do not pay attention before it breaks out, it can easily lead to herd-wide infection, so many farmers take porcine reproductive and respiratory syndrome very seriously. So what symptoms or warning signs appear when porcine reproductive and respiratory syndrome strikes? Let us take a look together with Qinnong Net.

1. Symptoms at onset

The state of pigs when porcine reproductive and respiratory syndrome strikes is fairly obvious. The first sign is reduced appetite: the pigs' enthusiasm for eating drops greatly, and they increasingly prefer to lie down. Afterwards the pig's body temperature begins to change; in the early stage the pig's body temperature frequently rises, and as the condition worsens the pig's body temperature slowly maintains a relatively high level, and in severe cases it can reach above 40°C. In the later stage of the disease, some swelling appears on the pig's head, and the whole pig's head looks as if it has become a size larger, and finally the pig's body turns blue-purple, with the colored area continuing to expand. When blue-purple appears on the pig's body, it can basically be confirmed as porcine reproductive and respiratory syndrome; everyone must be clear about this.

2. Time of onset

The time of onset is relatively concentrated, and the probability drops a lot after this period. Sows are mostly affected around three months after conception; this is the development period of the pig fetus inside the sow, when the mother's resistance has reached an extremely low level, making porcine reproductive and respiratory syndrome very likely. For piglets, the time of onset is mostly concentrated around 1-2 months after birth; at this time the piglet's own immune system happens to be in its perfecting period, so infection is very easy if care is not taken during rearing. Boars have a relatively lower probability of onset, mostly concentrated in the late fattening stage, and recent data show that the probability of onset is relatively high when boars are at 150-200 jin.

3. Causes of onset

The causes of onset are generally divided into two types: one is caused by external factors, and the other is induced by improper raising of the animals themselves. External factors are mostly caused by newly introduced breeding pigs carrying the virus, and some are also because a nearby pig farm had porcine reproductive and respiratory syndrome and it spread through the air to one's own main farm. Factors from one's own raising are mostly caused by hygiene and temperature, that is, the pig breed or the main farm carries the porcine reproductive and respiratory syndrome virus, but it is in a dormant period; when disinfection is not thorough enough or hygiene standards are not met during raising, the porcine reproductive and respiratory syndrome virus becomes active and causes disease. It is also possible that overly large temperature changes stimulate the virus's activity and lead to onset. So everyone must pay some attention to isolation and hygiene.

4. Susceptible groups

Determining the affected groups can effectively improve management for everyone and reduce the probability of onset; this point is extremely important. According to some current data, pregnant sows and newborn piglets are the most prone to porcine reproductive and respiratory syndrome; both are in a weak period of their own immune systems, and at this time they are most easily affected and fall ill.

Once porcine reproductive and respiratory syndrome appears, disinfection and defense of the entire pigpen must be done properly to avoid it spreading. Second, when there are many sows or piglets, we must eliminate external factors to avoid unnecessary losses. The symptoms of porcine reproductive and respiratory syndrome are all relatively common, so everyone must carefully compare them. At present the mortality rate of porcine reproductive and respiratory syndrome is very high, so everyone had better pay more attention to daily pigpen management.