English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

A field study was conducted to evaluate productive parameters in layers vaccinated with the Mycoplasma gallisepticum (MG) ts11 vaccine. A total of 9,065 free mycoplasma Hy Line Brown pullets were raised on a previously detected MG positive farm. The birds were divided in two groups and placed in two separated sections in the same farm. One group was vaccinated at four weeks of age and the other remained non vaccinated. Serum plate agglutination (SPA), haemagglutination inhibition (HI) and enzyme linked immunsorbent assay (ELISA) were used to measure the serum antibody response after vaccination and field challenges. Polymerase chain reaction assay (PCR) and cultures were used to determine field challenges by mycoplasma and salmonella. Vaccinated birds laid 188 egg/hen (11.55 kg) whereas non-vaccinated ones laid 184 egg/hen (11.34 kg) over a 41-week period. Feed conversion was 2.57 and 2.62 for the vaccinated and the non- vaccinated group respectively (p<0.05). There were significant differences in the productive parameters between vaccinated and non vaccinated group. The marginal economic analysis showed an economic profit of S/. 1.50 (US$ 0.43) per housed hen. The birds were exposed to environmental heat stress and natural challenges by Mycoplasma gallisepticum, Mycoplasma synoviae, infectious bronchitis virus and Salmonella enteritidis. Despite the negative influence of these factors on the productive performan- ce, the results of this study showed an economic profit and better productive results after vaccination with the ts11 strain.

COMPORTAMIENTO PRODUCTIVO DE UN LOTE DE GALLINAS DE POSTURA VACUNADO CON LA CEPA TS11 DE mycoplasma gallisepticum