Use of paternity tests in swine
These tests have several practical applications, as the detection of boars that are linked to the appearance of hernias or the susceptibility towards certain enteric diseases or even syndromes like the PFTS.
Page 2 of articles about boar in Articles
Simplified freezing of boar semen: possible?
Novel cryopreservation methods and containers are designed to increase semen cryosurvival without disturbing production of conventional liquid semen doses. This provides opportunities for gene banking and preserved fertility when inseminated deep intra uterine, alongside undisturbed commercial AI-dose production.
PCV2: Possible transmission to sows through artificial insemination and effects on quality of boar semen
PCV2 can be shed into semen by infected boars and research suggests that the virus can then be transmitted to gilts and sows by AI causing reproductive failure but there is no evidence that PCV2 in semen has effects on various characteristics of sperm cells.
The feeding of the boar
The great impact of the boar on the swine production (up to more than 6,000 piglets produced by boar and year) determines the great interest in the study of any factor that can have an incidence on its production results.
Clinical case: Unexpected findings block semen exports
The semen was destined for Japan which requires the donor boar to be tested with negative results within 60 days prior to collection for export for: Vesicular Stomatitis, Aujesky’s disease, PRRS, Brucellosis, Leptospirosis, and Tuberculosis.
Mating guidelines (III)
In the last chapter we examined mating guidelines that came rather close to being ideal, given that they achieve the following objectives: At least one mating should be adjusted to meet the ideal time and achieve the first objective with the least number of matings.
Alternative to surgical castration without anesthesia (I)
The administration of local or general anesthesia, accompanied in all cases by a long-lasting analgesic, eliminates or considerably reduces the pain caused by surgical castration. However, the use of these products has certain limitations.
Dimension and design of the mating and control unit
The mating and control unit is one of the most important elements of a sow unit. Thus, it must facilitate a high pregnancy rate, high number of piglets, uniform body condition, sow longevity and a low return rate.
Stimulation and mating of sows in stalls (II)
So far we have seen different options for retaining the males and for stimulating the stalled sows that maximize speed and stimulus. Once stimulated, now we are going to mate them.
Stimulation and mating of sows in stalls (I)
Different systems of boar’s retention during stimulation and mating in stalls have already been seen. Now we are going to put it into practice.
Boar control during heat checking and mating
Both for heat detection and for mating, maximum efficiency is achieved if the sow is well stimulated.
Seasonal Infertility in Swine
In natural conditions, there are seasonal fluctuations of availability of food and the earliness or delay in the onset of breeding is related to food levels.
PRRS: Transmission via direct and indirect routes (1/2)
In this second part the direct routes (infected pigs and contaminated semen) and indirect routes (fomites and transportation vehicles) of PRRSV are tackled, as is the persistence of the virus because the persistence of the infection is a characteristic of PRRSV infections in pigs and plays a major role in the control and eradication of the disease.