|
| ||
|
|
||
Broiler Flocks (broiler + flock)
Selected AbstractsNo association between partial depopulation and Campylobacter spp. colonization of Dutch broiler flocksLETTERS IN APPLIED MICROBIOLOGY, Issue 3 2005A.D. Russa Abstract Aims:, To determine whether an association exists between partial depopulation of a flock and increased Campylobacter colonization in that flock. Methods and Results:, Data from 1737 flocks of two Dutch integrators were used. Flocks that experienced partial depopulation were defined as ,exposed' and those that did not as ,nonexposed'. Multivariable modelling was accomplished with, in addition to ,exposure', the independent variables ,age of broilers at slaughter' and ,season' to adjust for possible confounding. The response variable was ,Campylobacter colonization'. The odds ratio (OR) for partial depopulation for integrator A was 0·8 [95% CI (0·4, 1·8)]; for integrator B the OR = 0·8 [95% CI (0·5, 1·3)]. Age and season were confounders: the difference in Campylobacter status between exposed and nonexposed flocks of integrator A could be explained by both variables; for integrator B, only season was associated with Campylobacter status. Conclusions:, We found no significant association between partial depopulation and an increased risk of Campylobacter colonization among broiler flocks at final depopulation. Significance and Impact of the Study:, This study demonstrates that Campylobacter colonization in a broiler flock is not influenced by the partial depopulation of that flock. [source] Genotyping of thermotolerant Campylobacter from poultry slaughterhouse by amplified fragment length polymorphismJOURNAL OF APPLIED MICROBIOLOGY, Issue 2 2007G. Johnsen Abstract Aim:, To examine the occurrence, diversity and transmission of Campylobacter in a poultry slaughterhouse. Methods and Results:, During a 4-week period, a slaughterhouse was sampled alternately during slaughtering and the following mornings post-disinfection. Samples were taken from poultry at six stages in the slaughter process and from 25 environmental sites. For positive broiler flocks slaughtered on one occasion, 92% and 48% of the environmental sites were positive during slaughter and post-disinfection, respectively. For positive laying hen flocks slaughtered on three occasions, 8,56% and 12,20% of the environmental sites were positive during slaughter and post-disinfection, respectively. Genetic fingerprinting by amplified fragment length polymorphism (AFLP) of the 109 isolates obtained resulted in 28 different AFLP clones. Five AFLP clones were present for more than 1 week. Conclusions:, Slaughtering of Campylobacter -positive broilers resulted in extensive contamination of the slaughterhouse, including the air. A high proportion of the laying hen flocks were Campylobacter positive, but these caused less environmental contamination than the broilers. This, together with the freezing of all layer carcasses, results in a lower public health risk from laying hens, when compared with broilers. Significance and Impact of the Study:, When slaughtering Campylobacter -positive broilers, the implementation of preventive measures is important to reduce contamination of negative carcasses and to protect the workers against infection. [source] Impact of antimicrobial drug usage measures on the identification of heavy users, patterns of usage of the different antimicrobial classes and time-trends evolutionJOURNAL OF VETERINARY PHARMACOLOGY & THERAPEUTICS, Issue 4 2008C. CHAUVIN Several measurement units are available to quantify antimicrobial usage in veterinary medicine, to obtain diverse measures such as the weight of active substance used, the live weight (LW) treated, the fraction of animals exposed, the number of treatments recorded or the cost represented. These measures can be applied to study practices variability between farms, to characterize patterns of usage of the different antimicrobial classes or to follow evolution of antimicrobial usage with time. An investigation was carried out to specifically explore the influence of measurement units on the conclusions obtained from such studies. Antimicrobial exposure was explored in a sample of turkey and chicken broiler flocks, using six different units [kg of active compound, treatments, days of administration, kg of LW treated, animal daily dose to treat 1 kg of LW (ADDkg) and euros] to compare flocks usage variability and patterns of use of the different antimicrobial classes. Time-trends evolutions of macrolides usage in turkey broilers, characterized by percentage of flocks exposed and LW treated, were also compared. In all analyses, the measure gave different results without equivalences, highlighting the necessity for care in choosing the measurement unit and caution in interpreting the figures obtained. [source] No association between partial depopulation and Campylobacter spp. colonization of Dutch broiler flocksLETTERS IN APPLIED MICROBIOLOGY, Issue 3 2005A.D. Russa Abstract Aims:, To determine whether an association exists between partial depopulation of a flock and increased Campylobacter colonization in that flock. Methods and Results:, Data from 1737 flocks of two Dutch integrators were used. Flocks that experienced partial depopulation were defined as ,exposed' and those that did not as ,nonexposed'. Multivariable modelling was accomplished with, in addition to ,exposure', the independent variables ,age of broilers at slaughter' and ,season' to adjust for possible confounding. The response variable was ,Campylobacter colonization'. The odds ratio (OR) for partial depopulation for integrator A was 0·8 [95% CI (0·4, 1·8)]; for integrator B the OR = 0·8 [95% CI (0·5, 1·3)]. Age and season were confounders: the difference in Campylobacter status between exposed and nonexposed flocks of integrator A could be explained by both variables; for integrator B, only season was associated with Campylobacter status. Conclusions:, We found no significant association between partial depopulation and an increased risk of Campylobacter colonization among broiler flocks at final depopulation. Significance and Impact of the Study:, This study demonstrates that Campylobacter colonization in a broiler flock is not influenced by the partial depopulation of that flock. [source] | ||||||||||