Effects of glutamine on performance and intestinal mucosa morphometry of broiler chickens vaccinated against coccidiosis

Scientia Agricola. 2016;73(4):322-327 DOI 10.1590/0103-9016-2015-0114


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Journal Title: Scientia Agricola

ISSN: 0103-9016 (Print); 1678-992X (Online)

Publisher: Universidade de São Paulo

Society/Institution: Escola Superior de Agricultura

LCC Subject Category: Agriculture: Agriculture (General)

Country of publisher: Brazil

Language of fulltext: Portuguese, Spanish; Castilian, English

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Brenda Carla Luquetti
Miguel Frederico Fernandez Alarcon
Raquel Lunedo
Daniel Mendes Borges Campos
Renato Luís Furlan
Marcos Macari


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Time From Submission to Publication: 16 weeks


Abstract | Full Text

ABSTRACT This study aimed to assess the effects of glutamine as feed additive on performance and intestinal mucosa morphometry of broiler chickens vaccinated against coccidiosis. A total of 400 day-old male chicks were randomly assigned to four treatments (NVNG – no vaccination, no glutamine supplementation; NVG – no vaccination, glutamine supplementation (10 g kg−1); VNG – vaccination, no glutamine supplementation; VG – vaccination, glutamine supplementation) replicated four times with 25 birds per replicate. A commercial sprayed-on vaccine against coccidiosis containing Eimeria acervulina, E. maxima, E. mivati, and E. tenella was administered at the hatchery. Broiler performance was evaluated from 1-28 days, and morphometric parameters were analyzed at 14, 21, and 28 days of age. Body weight gain and feed intake were negatively affected by vaccination, but not by glutamine. Vaccination increased crypt depth in the duodenum and jejunum at 21 and 28 days. In conclusion, this study showed that glutamine was not able to increase weight gain of broiler chickens, irrespective of whether the animals were vaccinated or not against coccidiosis. Glutamine supplementation was able to improve feed conversion in vaccinated birds suggesting trophic effect on intestinal epithelium improving.