Effect of replacing antibiotics with functional oils following an abrupt transition to high-concentrate diets on performance and carcass traits of Nellore cattle

Silva, A.P. dos S.; Zotti, Claiton André; Carvalho, Roberta Ferreira; Corte, R. R. P. S.; Cônsolo, Nara Regina Brandão; Silva, S. da L. e; Leme, Paulo Roberto

doi:10.1016/j.anifeedsci.2018.10.015

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…However, the gain-to-feed ratio was not statistically improved. dos Santos Silva et al (2018) reported increased observed-net energy for BW gain when adding 25 mg of virginiamycin per kilogram to a diet that contained 30 mg/kg of DM of monensin, resulting from numerically increased ADG and similar DMI. Based on a meta-analysis of data gathered from five Mexican feedlots, Gorocica and Tedeschi (2017b) concluded that ADG, gain-to-feed ratio, and HCW were greater for cattle fed 400 mg of monensin and 200 to 250 mg of virginiamycin per day than that of cattle fed 400 mg of monensin alone.…”

Section: Resultsmentioning

confidence: 99%

Combined use of monensin and virginiamycin to improve rumen and liver health and performance of feedlot-finished steers

Ceconi

Viano

Mendez

et al. 2022

Translational Animal Science

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Monensin and virginiamycin are included in beef cattle finishing diets as prophylaxis to minimize the incidence of ruminal acidosis and liver abscesses. Due to different and probably complementary modes of action, this study aimed to determine the effects of a combination of monensin and virginiamycin, both included in the diet at recommended doses, on ruminal health, the occurrence of liver abscesses, and growth performance of feedlot-finished cattle. One hundred and forty-four steers (6 animals/pen) were fed 1 of 3 corn-based finishing diets containing 30 mg of monensin (MN), 25 mg of virginiamycin (VM), or 30 and 25 mg of monensin and virginiamycin (MN+VM), respectively, per kilogram of dry matter. Ruminal pH probes were inserted into two animals per pen and set to record pH every 10 min. On d 100, animals were slaughtered, and rumens and livers were recovered, on which occurrence and degree of ruminal damage, prevalence and number of liver abscesses, and liver scores (A-: livers with no more than two small abscesses; A+: livers with at least one large abscess or more than four medium abscesses; A: any other abscessed liver) were determined. Simultaneous inclusion of monensin and virginiamycin resulted in a 4.3% decrease (P < 0.04) in dry matter intake (DMI; 8.8, 9.2, and 9.2 ±0.19 kg/d for MN+VM, MN, and VM-fed animals, respectively) and similar (P > 0.13) average daily body weight gain (ADG; 1.49 ±0.021 kg/d) and hot carcass weight (HCW; 269 ±1.7 kg), compared with feeding diets containing one additive or the other. Therefore, in terms of ADG, a 9.4% improvement (P < 0.01) in feed efficiency was observed in MN+VM-fed animals. Backfat thickness (5.6 ±0.08 mm) and ribeye area (69.9 ±0.53 cm 2) remained unaffected (P ≥ 0.74), as well as the minimum (4.98 ±0.047), mean (6.11 ±0.037), and maximum ruminal pH (7.23 ±0.033) values and the time (125 ±22.3 min/d), area (57.67 ±12.383 pH × h), and episodes (22 ±3.8 bouts) of pH below 5.6 (P ≥ 0.12). Overall, prevalence (24 ±3.4%) and the number of liver abscesses (1.6 ±0.14 abscesses/abscessed liver), liver scores (20 ±3.1% of A- and 4 ±1.8% of A livers), and prevalence (67 ±3.5%) and degree of damage to the ruminal epithelium (2.5 ±0.22% affected surface) were similar (P ≥ 0.18) across treatments; however, the occurrence of ruminal lesions tended (P ≤ 0.07) to be associated with that of liver abscesses and reduced ADG when feeding monensin alone.

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Section: Resultsmentioning

confidence: 99%

Combined use of monensin and virginiamycin to improve rumen and liver health and performance of feedlot-finished steers

Ceconi

Viano

Mendez

et al. 2022

Translational Animal Science

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“…BEO can also decrease amino acid deamination and ammonia production in the rumen, improve protein digestibility and promote greater nitrogen retention ( 11 , 14 , 15 ). In this context, some studies have been conducted to evaluate the efficacy of essential oils fed to cattle on animal performance and meat quality ( 16 – 18 ). However, the animal performance was similar in animals that did not receive additives, MON, or BEO.…”

Section: Introductionmentioning

confidence: 99%

Feedlot performance, rumen and cecum morphometrics of Nellore cattle fed increasing levels of diet starch containing a blend of essential oils and amylase or monensin

Silva

Souza

Acedo³

et al. 2023

Front. Vet. Sci.

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Feed additives used in finishing diets improve energy efficiency in ruminal fermentation, resulting in increased animal performance. However, there is no report evaluating the effect of BEO associated with exogenous α-amylase in response to increased starch content in feedlot diets. Our objective was to evaluate increasing levels of starch in the diet associated with a blend of essential oils plus amylase or sodium Monensin on performance, carcass characteristics, and ruminal and cecal morphometry of feedlot cattle. 210 Nellore bulls were used (initial body weight of 375 ± 13.25), where they were blocked and randomly allocated in 30 pens. The experiment was designed in completely randomized blocks in a 3 × 2 factorial arrangement: three starch levels (25, 35, and 45%), and two additives: a blend of essential oils plus α-amylase (BEO, 90 and 560 mg/kg of DM, respectively) or sodium Monensin (MON, 26 mg/kg DM). The animals were fed once a day at 08:00 ad libitum and underwent an adaptation period of 14 days. The diets consisted of sugarcane bagasse, ground corn, soybean hulls, cottonseed, soybean meal, mineral-vitamin core, and additives. The animals fed BEO35 had higher dry matter intake (P = 0.02) and daily weight gain (P = 0.02). The MON treatment improved feed efficiency (P = 0.02). The treatments BEO35 and BEO45 increased hot carcass weight (P < 0.01). Animals fed BEO presented greater carcass yield (P = 0.01), carcass gain (P < 0.01), rib eye area gain (P = 0.01), and final rib eye area (P = 0.02) when compared to MON. The MON25 treatment improved carcass gain efficiency (P = 0.01), final marbling (P = 0.04), and final subcutaneous fat thickness (P < 0.01). The use of MON reduced the fecal starch% (P < 0.01). Cattle-fed BEO increased rumen absorptive surface area (P = 0.05) and % ASA papilla area (P < 0.01). The MON treatment reduced the cecum lesions score (P = 0.02). Therefore, the use of BEO with 35 and 45% starch increases carcass production with similar biological efficiency as MON; and animals consuming MON25 improve feed efficiency and reduce lesions in the rumen and cecum.

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Monensin associated or not with virginiamycin or functional oil for feedlot beef cattle

Lamag

Moraes

Araújo

et al. 2021

Trop Anim Health Prod

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Effect of replacing antibiotics with functional oils following an abrupt transition to high-concentrate diets on performance and carcass traits of Nellore cattle

Cited by 6 publications

References 27 publications

Combined use of monensin and virginiamycin to improve rumen and liver health and performance of feedlot-finished steers

Combined use of monensin and virginiamycin to improve rumen and liver health and performance of feedlot-finished steers

Feedlot performance, rumen and cecum morphometrics of Nellore cattle fed increasing levels of diet starch containing a blend of essential oils and amylase or monensin

Monensin associated or not with virginiamycin or functional oil for feedlot beef cattle

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