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Chicks infected during the first two weeks of life with chicken anaemia virus (CAV) manifest clinical disease that can be avoided if the breeder hens transfer enough antibodies to their progeny. The objective of the present work was to establish the prevalence and titer of anti-CAV antibodies in some Brazilian broiler hen breeder flocks and verify in which phase of life the birds were infected. A total of 1,709 serum samples from 12 broiler hen flocks vaccinated against CAV and 64 unvaccinated flocks were analyzed for CAV antibodies with an enzyme-linked immunosorbent assay (ELISA). All non-vaccinated breeder flocks were found to be infected with CAV, with 89% of the hens tested presenting antibodies, 52% of these with titers considered high enough to protect their progeny against CAV infection. Likewise, all vaccinated hens had antibody titer to CAV capable of conferring protection to their progeny. Thus, vaccination of hens seems capable of conferring protection to chicks against clinically apparent CAV-associated disease.

In this investigation, we determined the prevalence of the Ornithobacerium rhinotracheale (ORT) infection in broilers and broiler breeders in southern Brazil. We also correlated the presence of antibodies in broilers with performance. Sera from 1550 broilers from 50 flocks were collected during the slaughter time in nine companies with federal veterinary inspection of the state of Rio Grande do Sul. Sera from 480 meat-type breeders of 40 flocks from 14 companies in southern Brazil were also analyzed by enzyme-linked immunosorbent assay, and the prevalence of antibodies was determined. The prevalence of ORT antibodies in broiler flocks was 63.83%, but in each individual flock only 6.52% of the birds were positive. The prevalence in broiler breeder flocks was 100.00%, and in each individual flock 94.62% of the birds were positive. There was a positive correlation between the presence of antibodies to ORT and decreased body weight in broilers. There was no significant correlation between presence of antibodies to ORT and age, lineage, efficiency index, feed conversion, and mortality. There was a positive correlation between the presence of respiratory signs and antibodies to ORT, although the reverse correlation was not significant. These results confirm that ORT is present and widespread in broilers and broiler breeders in southern Brazil.

O artigo busca compreender a trajetória acadêmica e de trabalho de jovens egressos do Ensino Técnico em Agropecuária do IFC, por meio de abordagem qualitativa. Utilizou-se de pesquisa bibliográfica, questionário e entrevista individual com 24 ex-alunos. Os pressupostos teórico-metodológicos desenvolvidos estão fundamentados na categoria trabalho (perspectiva ontológica) e juventude como diversidade. Os resultados demonstram que essa oferta de ensino profissional está servindo mais como passagem para a realização de outros cursos não associados à área do que direcionando para o trabalho agropecuário.

This article presents analytical results of an investigation that aimed to analyze the motivations and expectations of young graduates of the Agricultural Technical Education of Santa Catarina, the IFCCamboriú (Federal Institute of Santa Catarina). The concept of rural student-worker was significant to understand it as a social being that contributes to the growth of society and the agricultural sector through its work. The research is a qualitative approach to its development and data collection using bibliographical research, questionnaire, and individual interviews with 24 (twenty-four) former students of the institution. The developed theoretical and methodological assumptions are based on the work category (ontological perspective) and youth from a historical and socio-cultural perspective. The results confirm the thesis that the Technical Course in Agriculture in the study group, are not reaching their goals in training for work in the specific branch of Agriculture, despite a conducive and attractive setting for graduates in entering the agribusiness labor market and continued studies in this area. Educational centers need to work more extensively on the possibilities and stimulating labor camps, developing entrepreneurship. Thus it is possible to strengthen the region in which you install the course.