Osvaldo Fonseca

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Although avian influenza (AI) virus of H5 and H7 subtypes has the potential to mutate to a highly pathogenic form and cause very high mortalities in some poultry species, most AI infections in poultry are due to low pathogenic AI (LPAI). Hence serological surveys, coupled with passive surveillance activities, are essential to detect sub-clinical infections(More)
Classical swine fever virus produces a huge mortality in infected herds during recurrent outbreaks, predominantly in tropical and subtropical areas. In this scenario, it is common that cold-chain related issues affect the efficacy of virus attenuated-derived vaccines, which are frequently used in eradication programs. In the present work, the stability and(More)
Cuba is a country in transition with a considerable potential for economic growth. Soils are recipients and integrators of chemical pollution, a frequent negative side effect of increasing industrial activities. Therefore, we established a soil monitoring network to monitor polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in(More)
The authors designed a risk-based approach to the selection of poultry flocks to be sampled in order to further improve the sensitivity of avian influenza (AI) active surveillance programme in Cuba. The study focused on the western region of Cuba, which harbours nearly 70% of national poultry holdings and comprise several wetlands where migratory waterfowl(More)
The presence of acid-fast bacilli in the waters of the lake of Aleixo is recorded. This site is a hanseniasis colony. The physical-chemical environment of this lake is described by an annual cycle and it is intended to relate the quality of the water to the highest or to the lowest frequency of detected mycobacteria. It is suggested that the work in this(More)
Vaccination against classical swine fever (CSF) is an essential measure for its control in endemic areas, and the Chinese Strain has been used with success in already disease free countries. Nevertheless the complexity of the factors interacting on the epidemiology and control of CSF, when the expected success is not reached with the vaccination of(More)
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