Roy Rodríguez

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Strains F and R of Mycoplasma gallisepticum (MG) were compared in two laboratory trials for their relative pathogenicity in terms of inducing airsacculitis and antibody production to MG. Chickens exposed to the R strain had significantly higher incidence of air-sac lesions (P less than 0.05) and greater severity of airsacculitis than did chicks exposed to(More)
The efficacy of live Mycoplasma gallisepticum (MG) vaccine against respiratory mycoplasmosis was studied in three laboratory trials with commercial broilers. Broiler chickens were infected with the F or R strain of MG by eyedrop at 1 day of age, and challenged by aerosol exposure to the R strain of MG along with eyedrop vaccination against Newcastle disease(More)
Salmonellosis affects humans more frequently than any other foodborne disease, and it causes severe economic losses in the poultry industry. A cross-sectional study was carried out to estimate the prevalence of Salmonella spp. in laying hen farms in the Tolima region of Colombia. Fifteen egg-laying hen farms were sampled, and a total of 589 samples were(More)
Pertussis vaccination with 4–5 doses of acellular vaccines is recommended in Spain to all children at 2 months to 6 years of age. The effectiveness of the acellular pertussis vaccination was assessed in this study by comparing the incidence of secondary pertussis in vaccinated (4–5 doses) and unvaccinated or partially vaccinated (0–3 doses) household(More)
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