Effect of housing conditions (clean vs. dirty) on growth performance and feeding behavior in growing pigs in a tropical climate

Renaudeau, David

doi:10.1007/s11250-008-9223-5

Cited by 21 publications

(12 citation statements)

References 8 publications

(9 reference statements)

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“…In addition, utilizing a clean vs. a dirty environment to stimulate a chronic immune response decreases animal performance [ 45 – 47 ]. In pigs, an immune response does not generally result in decreased feed conversion [ 48 – 50 ]. However, both lysozyme [ 12 ] and antibiotics [ 1 ] improve feed efficiency in nursery swine.…”

Section: Lysozyme As a Feed Additivementioning

confidence: 99%

Lysozyme as an alternative to growth promoting antibiotics in swine production

Oliver

Wells

2015

J Animal Sci Biotechnol

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Lysozyme is a naturally occurring enzyme found in bodily secretions such as tears, saliva, and milk. It functions as an antimicrobial agent by cleaving the peptidoglycan component of bacterial cell walls, which leads to cell death. Antibiotics are also antimicrobials and have been fed at subtherapeutic levels to swine as growth promoters. These compounds benefit swine producers by minimizing production losses by increasing feed efficiency and decreasing susceptibility to bacterial infection and disease. This manuscript reviews the knowledge of the effects of lysozyme, as compared to traditional subtherapeutic antibiotics in swine feed, on pig performance and health. It is clear from decades of studies that antibiotic use in feeds increases pig performance, particularly in the nursery. Similarly, lysozyme, as a feed additive, increases growth and feed efficiency. While the mechanism by which antibiotics and lysozyme improve performance is not clearly understood, both of these feed additives improve gastrointestinal health, improve the metabolic profile, and alter the gastrointestinal bacteria ecology of swine. Therefore, lysozyme is a suitable alternative to growth-promoting subtherapeutic antibiotic use in swine feed.

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Section: Lysozyme As a Feed Additivementioning

confidence: 99%

Lysozyme as an alternative to growth promoting antibiotics in swine production

Oliver

Wells

2015

J Animal Sci Biotechnol

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“…It has been well documented that animal performance is increased in 'clean vs. dirty' environments (Renaudeau, 2009). Pigs reared in a dirty environment had a 10% reduction in average daily gain (ADG) (0.78 vs. 0.87 kg) and 18% reduction in feed intake (1.86 vs. 2.28 kg) as compared with Table 1.…”

Section: Thoroughly Clean the Barnmentioning

confidence: 99%

Feeding and barn management strategies that maximize feed efficiency

Tokach

Goodband

DeRouchey

et al. 2012

Feed Efficiency in Swine

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The stockperson is responsible for the daily care and welfare of pigs in the barn. Through their actions, they also can influence overall feed efficiency. Prior to loading pigs, thoroughly cleaning and operating the facility in an all-in, all-out manner has shown to improve pig performance and feed efficiency. Removing feed from previous groups of pigs and repairing feeding and ventilation equipment influence closeout feed efficiency. When loading the barn, pigs should not be sorted into narrow weight categories. With weanling pigs, mat feeding can help increase feed consumption and reduce mortality immediately after weaning; however, prolonged mat feeding will result in feed wastage. After loading, daily chores that influence overall feed efficiency include individual pig treatment and timely euthanasia, ensuring water and feed availability, feeding the appropriate diet, managing the air quality and environmental temperature, properly adjusting feeders, and handling pigs in a positive manner. Removing a portion of the pigs from all pens during initial marketing events can result in feed savings while maximizing weight produced from the facility. Withdrawing feed prior to market also can result in feed savings. Proper handling during loading and transport to the processor to minimize mortality also can influence closeout feed efficiency. The stockperson can play a large role in improving overall feed efficiency by how they manage their day-today activities in the barn. This chapter will focus on these activities and their impact on feed efficiency.

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“…Production environments with high contamination levels have a direct influence on increased mortality, and/or indirect influence on uniformity and decreased broiler performance (Ristow, 2008 ; Renaudeau, 2009 ). Thus, cleaning and disinfection can have a positive influences on the increase in birds’ productive performance, mainly in environments where there is a sanitary challenge (Burbarelli et al., 2015 ).…”

Section: Introductionmentioning

confidence: 99%

Cleaning and disinfection programs against Campylobacter jejuni for broiler chickens: productive performance, microbiological assessment and characterization

et al. 2017

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Detailed cleaning and disinfection programs aims to reduce infection pressure from microorganisms from one flock to the next. However, studies evaluating the benefits to poultry performance, the sanitary status of the facilities, and the sanitary quality of the meat are rarely found. Thus, this study was designed to evaluate 2 cleaning and disinfecting programs regarding their influence on productive performance, elimination of Campylobacter, and characterization of Campylobacter jejuni strains when applied to broiler chickens’ facilities. Two subsequent flocks with 960 birds each were distributed into 32 pens containing 30 birds each. In the first, the whole flock was inoculated with a known strain of Campylobacter jejuni in order to contaminate the environment. In the second flock, performance and microbiological evaluations were done, characterizing an observational study between 2 cleaning and disinfection programs, regular and proposed. The regular program consisted of sweeping facilities, washing equipment and environment with water and neutral detergent. The proposed cleaning program consisted of dry and wet cleaning, application of 2 detergents (one acid and one basic) and 2 disinfectants (250 g/L glutaraldehyde and 185 g/L formaldehyde at 0.5% and 210 g/L para-chloro-meta-cresol at 4%). Total microorganism count in the environment and Campylobacter spp. identification were done for the microbiological assessment of the environment and carcasses. The positive samples were submitted to molecular identification of Campylobacter spp. and posterior genetic sequencing of the species identified as Campylobacter jejuni. The birds housed in the facilities and submitted to the proposed treatment had better performance when compared to the ones in the regular treatment, most likely because there was a smaller total microorganism count on the floor, walls, feeders and drinkers. The proposed program also resulted in a reduction of Campylobacter spp. on floors, drinkers and birds. Moreover, it was possible to identify 6 different Campylobacter jejuni strains in the facilities. The proposed treatment resulted in a positive influence on the birds’ performance and reduction of environment contamination for broiler chickens.

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Effect of housing conditions (clean vs. dirty) on growth performance and feeding behavior in growing pigs in a tropical climate

Cited by 21 publications

References 8 publications

Lysozyme as an alternative to growth promoting antibiotics in swine production

Lysozyme as an alternative to growth promoting antibiotics in swine production

Feeding and barn management strategies that maximize feed efficiency

Cleaning and disinfection programs against Campylobacter jejuni for broiler chickens: productive performance, microbiological assessment and characterization

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