a-ligated-intestinal-loop-model-anesthetized-specific-pathogen-free

A Ligated Intestinal Loop Model in Anesthetized Specific Pathogen Free Chickens to Study <em>Clostridium Perfringens</em> Virulence

Necrotic enteritis was studied in chickens using various in vivo infection models. Most of these use a combination of predisposing factors, such as ...

Université de Montréal

Posture changes are a major consequence of idiopathic scoliosis (IS). Posture changes can lead to psychosocial and physical impairments in adolescents with IS. Therefore, it is important to assess posture, but the test-retest reliability of posture measurements still remains unknown in this population.

Test-retest reliability of posture measurements in adolescents with idiopathic scoliosis.

The objectives were to compare the effects of an antibiotic-free (ABF) program in commercial broiler chicken flocks using a live non-attenuated coccidiosis vaccine on fecal Eimeria spp. excretion and growth performances with those of conventionally raised commercial broiler chicken flocks. Fecal samples were collected every 3 d from 7 d of age to slaughter in 44 flocks of 7 participating farms for oocyst counts by the McMaster method. A live non-attenuated anticoccidial vaccine was administered by spray cabinet at the hatchery in ABF flocks only. Shuttle programs in conventional flocks consisted of in-feed chemical anticoccidials from 0 to 20 d of age, followed by polyether ionophores until slaughter. In-feed antibiotic growth promoters were included from the starter to finisher diets in conventional flocks only. Age of the flock at the oocyst excretion peak (AGE_PEAK) and the number of oocysts at that excretion peak (OPG_PEAK) were recorded. There was a significant difference of 2.7 d (P = 0.0001) for the AGE_PEAK, from 26.4 d in the conventional treatment to 23.7 d in the ABF program. There was no significant difference for the OPG_PEAK between the 2 treatments (P = 0.626). There was a significant decrease of 2.28 g in the average daily gain (P = 0.004) and increase of 0.08 for the feed conversion ratio (P < 0.0001) in the ABF program compared to the conventional program. There were no significant differences for body weights at slaughter (P = 0.0563), livability (P = 0.2694), and condemnations (P = 0.6775). From this study, it can be concluded that an ABF program using a live non-attenuated vaccine will show an earlier oocyst excretion peak compared to a shuttle program, but no significant effect was observed on the total number of oocysts at that excretion peak between the 2 programs.

The use of a live non-attenuated coccidiosis vaccine modifies Eimeria spp. excretion in commercial antibiotic-free broiler chicken flocks compared to conventional shuttle anticoccidial programs.

Eric Parent

Department of Clinical Sciences,
Faculty of Veterinary Medicine,
Department of Clinical Sciences, Faculty of Veterinary Medicine

Université de Montréal

A Ligated Intestinal Loop Model in Anesthetized Specific Pathogen Free Chickens to Study Clostridium Perfringens Virulence

Eric Parent

.css-o250i3{font-size:18px;font-family:Open Sans,sans-serif;line-height:21.6px;}Department of Clinical Sciences,Faculty of Veterinary Medicine,Department of Clinical Sciences, Faculty of Veterinary Medicine

Université de Montréal

A Ligated Intestinal Loop Model in Anesthetized Specific Pathogen Free Chickens to Study Clostridium Perfringens Virulence

Department of Clinical Sciences,
Faculty of Veterinary Medicine,
Department of Clinical Sciences, Faculty of Veterinary Medicine