Monitoring Deep Body Temperature Responses of Broilers Using Biotelemetry

Lacey, Britt; Hamrita, T. K.; Lacy, Mary E.; Wicklen, G. Van; Czarick, Michael

doi:10.1093/japr/9.1.6

Cited by 20 publications

(11 citation statements)

References 3 publications

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“…The finding of high activity in the temperature range of 37 to 55°C is promising for application in humans or farm animals, where the body temperature in which the product must function is close to 40°C for both pigs (43) and poultry (23). However, the reduction in activity when the temperature exceeded 65°C may be unacceptable for withstanding the high temperatures to which feed is exposed during pelleting.…”

Section: Discussionmentioning

confidence: 99%

Novel Expression Vector for Secretion of Cecropin AD in Bacillus subtilis with Enhanced Antimicrobial Activity

Chen

Zhu

Cao

et al. 2009

Antimicrob Agents Chemother

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Cecropin AD, a chimeric antimicrobial peptide obtained from cecropins, is effective at killing specific microorganisms. However, a highly efficient expression system is still needed to allow for commercial application of cecropin AD. For the exogenous expression of cecropin AD, we fused the cecropin AD gene with a small ubiquitin-like modifier (SUMO) gene and a signal peptide of SacB, while a Bacillus subtilis expression system was constructed based on Bacillus subtilis cells genetically modified by the introduction of an operon including an isopropyl-␤-D-thiogalactopyranoside (IPTG)-inducible Spac promoter, a signal peptide of amyQ, and the SUMO protease gene. The recombinant cecropin AD was expressed, and 30.6 mg of pure recombinant protein was purified from 1 liter of culture supernatant. The purified cecropin AD displayed antimicrobial activity against some pathogens, such as Staphylococcus aureus and Escherichia coli, and was especially effective toward Staphylococcus aureus, with MICs of <0.05 M (0.2 g/ml). Stability analysis results showed that the activity of cecropin AD was not influenced by temperatures as high as 55°C for 20 min; however, temperatures above 85°C (for 20 min) decreased the antimicrobial activity of cecropin AD. Varying the pH from 4.0 to 9.0 did not appear to affect the activity of cecropin AD, but some loss of potency was observed at pH values lower than pH 4.0. Under the challenge of several proteases (proteinase K, trypsin, and pepsin), cecropin AD maintained functional activity. The results indicated that the recombinant product expressed by the designed Bacillus subtilis expression system was a potent antimicrobial agent and could be applied to control infectious diseases of farm animals or even humans.

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Section: Discussionmentioning

confidence: 99%

Novel Expression Vector for Secretion of Cecropin AD in Bacillus subtilis with Enhanced Antimicrobial Activity

Chen

Zhu

Cao

et al. 2009

Antimicrob Agents Chemother

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“…A similar approach to growing broilers was taken by Aerts et al [36] where the objective was to control the growth trajectory of broiler chickens using an adaptive, compact, dynamic process model. Also, Lacey et al [37] described a number of investigations into the responsiveness and on-line measurability of deep body temperature in commercial broilers using a biotelemetry system.…”

Section: • Microphone Sensormentioning

confidence: 99%

A Cost-Effective Pigsty Monitoring System Based on a Video Sensor

Chung¹,

Kim²,

Lee³

et al. 2014

KSII TIIS

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Automated activity monitoring has become important in many applications. In particular, automated monitoring is an important issue in large-scale management of group-housed livestock because it can save a significant part of farm workers' time or minimize the damage caused by livestock problems. In this paper, we propose an automated solution for measuring the daily-life activities of pigs by using video data in order to manage the group-housed pigs. Especially, we focus on the circadian rhythm of group-housed pigs under windowless and 24-hour light-on conditions. Also, we derive a cost-effective solution within the acceptable range of quality for the activity monitoring application. From the experimental results with the video monitoring data obtained from two pig farms, we believe our method based on circadian rhythm can be applied for detecting management problems of group-housed pigs in a cost-effective way.

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“…When thermoneutral conditions are considered, T ranging from 20 to 26.3ºC (MEDEIROS et al, 2005), the CT simulated by the fuzzy system were in the interval from 41.2ºC and 42.2ºC, considered as typical values under comfortable environment (LACEY et al, 2000;TAO & XIN, 2003;LIN et al, 2005). On the other hand, for T equal to 35ºC the CT simulated by the fuzzy system is 43.50ºC, whereas MARCHINI et al (2007) found 42.9 when the animals were subject to high cyclic values of T. Exposition of broiler chickens to high values of T results in reduction of performance (COOPER & WASHBURN, 1998), provoking decrease of feed intake, growth rate, chest productivity and meat quality, in addition to the use of energy to promote heat loss instead of production (DOZIER et al, 2006;LU et al, 2007).…”

Section: Resultsmentioning

confidence: 99%