Using DNA analysis by means of conventional PCR and Real-Time PCR, we can determine the presence or absence of pathogenic agents (viral, bacterial, etc.) in semen, blood, urine, stool samples and the degree of infection. Mention must be made, among others, of infections caused by Pseudomonas spp, Micrococcus spp, Staphylococcus spp, Klebsiella spp, Escherichia coli, Citrobacter spp, Protein spp, Actinomyces spp, Serratia spp, Enterobacter spp, Bacillus spp, Streptococcus spp, Flavobacterium spp, Actinobacillus spp, Acinetobacter spp, Lactobacillus spp, Bacteroides spp, Coryne bacterium spp, Neisseria spp, Providencia spp, Pasteurella spp, Enterobacter spp, etc. We also detect the porcine reproductive and respiratory syndrome virus (PRRSV), the African swine fever virus, classic swine fever virus, aphthous fever virus, swine vesicular disease virus, type 2 swine circovirus, swine parvovirus, swine influenza virus and picovirus, adenovirus, enterovirus, reovirus, norovirus and sapovirus, torque-tenovirus, torovirus, etc.