Liver Abnormalities in Cattle

Batista, Luiz Fernando; Holland, Ben P

doi:10.1016/j.cvfa.2022.08.002

Cited by 6 publications

(4 citation statements)

References 47 publications

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“…Severe liver abscess has been shown to impact animal performance negatively ( Shin et al, 1988 ; Brink et al, 1990 ). Batista and Holland (2022) indicated that liver abscesses might increase the NE requirement for maintenance in feedlot cattle. However, evaluations of acute and subacute acidosis’s impact on energy utilization have not yet been studied.…”

Section: Discussionmentioning

confidence: 99%

“… Tedeschi and Gorocica-Buenfil (2018) reported that improvements in animal performance due to virginiamycin supplementation occur dose-dependently when above 18 mg/kg and are likely maximized when fed above 24 mg/kg. However, it remains unclear whether the impacts of virginiamycin supplementation on animal growth and development are solely attributed to a decrease in liver abscess prevalence, which enhances overall animal health status ( Batista and Holland, 2022 ; Dias Batista et al, 2022 ), a shift in the SCFA profile favoring propionate production in the rumen ( Nagaraja et al, 1987 ), or an improvement in protein flow to the small intestine by sparing protein deamination in the rumen ( Ives et al, 2002 ). The objective of this study was to evaluate the effects of three different doses of virginiamycin supplementation (0, 180, and 240 mg/d) on in vivo and in vitro ruminal digestion kinetics of beef steers consuming a grain-based diet.…”

Section: Introductionmentioning

confidence: 99%

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The influence of virginiamycin on digestion and ruminal parameters under feedlot conditions

Dias Batista,

Rivera,

Fonseca

et al. 2024

Translational Animal Science

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This experiment aimed to assess the impact of virginiamycin on in vitro gas production dynamics, rumen kinetics, and nutrient digestibility in beef steers fed a grain-based diet. Nine ruminally cannulated British-crossbred steers (596 ± 49 kg) were assigned to this experiment. Animals were housed in three pens (n=3/pen) equipped with a Calan gate feed system and water troughs. Pens were enrolled in a 3×3 Latin square design containing three periods of 16 d, and a 5-d washout interval between periods. Dietary treatments consisted of virginiamycin (VM) administration at 0 (VM0), 180 (VM180), or 240 mg/d (VM240). During d 15 and 16 of each period, about 600 mL of rumen fluid and urine samples were collected before (0 h), and at 4, 8, 12, and 16 h after the morning feed (0730 h), rumen inoculum was used to take pH and redox potential measurements immediately after collection using a portable pH and redox meter, and subsamples were taken for volatile fatty acids (VFA) and NH3-N analyses, and urine samples were composited daily and analyzed for creatinine and purine derivatives (PD) content to estimate microbial crude protein flow. During the 4-h post-morning feed rumen collection, rumen inoculum was utilized to perform in vitro gas production measurements. Fecal samples were collected on d 16 of each period to estimate nutrient digestibility using acid detergent insoluble ash as an internal marker. Animals were considered the experimental unit for the statistical analyses, and periods and squares were included as random variables. The total and rate of gas production were similar among treatments (P ≥ 0.17). The second-pool (i.e., fiber) gas production increased linearly as VM inclusion increased (P = 0.01), with VM240 being greater compared to VM180 and VM0 (7.84, 6.94, and 6.89 mL, respectively). Ruminal pH linearly increased as VM increased, with VM240 being greater than VM0 and VM180 intermediate (5.90, 5.82, and 5.86, respectively; P = 0.03). The VFA concentrations did not differ (P ≥ 0.13), but the acetate-to-propionate ratio was the highest in VM240 (P = 0.005). Branched-chain VFA increased (P ≤ 0.03) while lactate concentrations decreased (P = 0.005) linearly with VM. The ruminal NH3-N concentration was the lowest in the VM0 (P = 0.006). The estimated absorbed PD, purine derivative to creatinine index, and microbial N flow increased linearly with VM (P ≤ 0.07). The provision of VM influenced rumen dynamics in a dose-dependent manner.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The influence of virginiamycin on digestion and ruminal parameters under feedlot conditions

Dias Batista,

Rivera,

Fonseca

et al. 2024

Translational Animal Science

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“…However, the lack of effect of the LA presence on ADG, feed efficiency, carcass weight, and ribeye area in animals fed diets with concentrate levels above 90% could be attributed to a compensatory effect of the greater digestibility of these diets, which would offset the increased nutritional requirements of LA-affected animals. According to Batista and Holland, [12], the presence of LA can increase the net energy for maintenance requirements in cattle by up to 4.8%.…”

Section: Discussionmentioning

confidence: 99%

“…The occurrence of liver abscesses (LAs) causes a reduction in animal performance and feed efficiency [9], as the liver is the central organ of metabolism, accounting for 40 to 50% of total oxygen consumption in cattle [10]. Liver abscess also decreases carcass weight and yield [11,12] or may lead to carcass condemnation when contamination occurs due to abscesses rupturing during slaughter. According to Harris et al [13], liver condemnation due to the occurrence of LA is responsible for 58% of liver condemnations in the USA.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Liver Abscesses on Performance and Carcass Traits in Beef Cattle: A Meta-Analysis Study

Torres,

da Silva,

Chardulo

et al. 2024

Ruminants

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The use of high-grain diets in feedlots is associated with the development of acidosis and ruminitis, which can lead to the occurrence of liver abscesses (LAs). However, the effect of LA on carcass traits is not well known. This study assessed the effects of LA on the performance and carcass traits of beef cattle. Nine peer-reviewed publications with forty-seven treatment means were included in the data set. The effects of the LA were evaluated by examining the weighted mean difference (WMD) between LA (animal with LA) and control treatment (animal without LA). Heterogeneity was explored by meta-regression, followed by a subgroup analysis of the scores and percentages of liver abscess and concentrate level in the feedlot diet. Animals affected by LA showed a reduction in dry matter intake (−1.03%) and feed efficiency (−1.82%). Animals with an LA score of “A” (one or two small abscesses) exhibited a decrease in carcass weight (WMD = 3.41 kg; p = 0.034) and ribeye area (WMD = −1.37 cm2; p = 0.019). When assessing the impact of LA on carcass traits, the most reliable finding indicates a 1.21% reduction in the ribeye area, with no adverse effects observed on subcutaneous fat thickness or the marbling score in the carcass.

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