scholarly journals The Welfare Absence Means Pathology: An Example of Abomasal Ulcers and Fatal Peritonitis in Feedlot Calves

2021 ◽  
Vol 9 (3) ◽  
Author(s):  
Cecilia Ramírez-Hernández ◽  
Luis Jorge García-Márquez ◽  
Johnatan Alberto Ruiz-Ramírez ◽  
Rafael Ramírez-Romero
Keyword(s):  
Feedlot Calves

scholarly journals Importance and Antimicrobial Resistance of Mycoplasma bovis in Clinical Respiratory Disease in Feedlot Calves

Animals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1470
Author(s):  
Ana García-Galán ◽  
Juan Seva ◽  
Ángel Gómez-Martín ◽  
Joaquín Ortega ◽  
Francisco Rodríguez ◽  
...  
Keyword(s):  
Respiratory Disease ◽  
Clinical Signs ◽  
Antimicrobial Treatment ◽  
Mycoplasma Bovis ◽  
Bacterial Disease ◽  
Feedlot Calves ◽  
Fixed Panel

Bovine respiratory disease (BRD) is an important viral and/or bacterial disease that mainly affects feedlot calves. The involvement of Mycoplasma bovis in BRD can lead to chronic pneumonia poorly responsive to antimicrobial treatment. Caseonecrotic bronchopneumonia is a pulmonary lesion typically associated with M. bovis. In Spain, M. bovis is widely distributed in the feedlots and circulating isolates are resistant to most antimicrobials in vitro. However, the role of this species in clinical respiratory disease of feedlot calves remains unknown. Furthermore, available data are relative to a fixed panel of antimicrobials commonly used to treat BRD, but not to the specific set of antimicrobials that have been used for treating each animal. This study examined 23 feedlot calves raised in southeast Spain (2016–2019) with clinical signs of respiratory disease unresponsive to treatment. The presence of M. bovis was investigated through bacteriology (culture and subsequent PCR), histopathology and immunohistochemistry. The pathogen was found in 86.9% (20/23) of the calves, mainly in the lungs (78.26%; 18/23). Immunohistochemistry revealed M. bovis antigens in 73.9% (17/23) of the calves in which caseonecrotic bronchopneumonia was the most frequent lesion (16/17). Minimum inhibitory concentration assays confirmed the resistance of a selection of 12 isolates to most of the antimicrobials specifically used for treating the animals in vivo. These results stress the importance of M. bovis in the BRD affecting feedlot calves in Spain.

Efficacy and productive performance of moxidectin in feedlot calves infected with nematodes resistant to ivermectin

2016 ◽  
Vol 223 ◽  
pp. 26-29 ◽  
Author(s):  
L.E. Fazzio ◽  
N. Streitenberger ◽  
W.R. Galvan ◽  
R.O. Sánchez ◽  
E.J. Gimeno ◽  
...  
Keyword(s):  
Productive Performance ◽  
Feedlot Calves

Comparing the Performance of Sorghum Silage with Maize Silage in Feedlot Calves

2006 ◽  
Vol 9 (13) ◽  
pp. 2450-2455 ◽  
Author(s):  
H. Fazaeli ◽  
H.A. Golmohhammadi . ◽  
A. Al-Moddarres . ◽  
S. Mosharraf . ◽  
A.A. Shoaei .
Keyword(s):  
Maize Silage ◽  
Sorghum Silage ◽  
Feedlot Calves

scholarly journals Impact of ivermectin-resistant gastrointestinal nematodes in feedlot cattle in Argentina

2012 ◽  
Vol 32 (5) ◽  
pp. 419-423 ◽  
Author(s):  
Luis E. Fazzio ◽  
Nicolas Yacachury ◽  
Walter R. Galvan ◽  
Elias Peruzzo ◽  
Ricardo O. Sánchez ◽  
...  
Keyword(s):  
Mixed Model ◽  
Gastrointestinal Nematodes ◽  
Feedlot Cattle ◽  
Gastrointestinal Parasites ◽  
Average Weight ◽  
Buenos Aires Province ◽  
Fecal Samples ◽  
Block Variables ◽  
Feedlot Calves ◽  
The Impact

The aim was to evaluate for 75 days the impact on production of the remaining burden of ivermectin (IVM)-resistant parasites in naturally infected feedlot calves. The herds came from tick-infested areas of cattle breeding where the systematic use of IVM to control tick increases the gastrointestinal parasites resistant to this drug. This investigation was carried out in two commercial feedlots in Buenos Aires province. In feedlot A, two groups of 35 animal each received IVM 1% and the other received ricobendazole (RBZ) 10% respectively. The same was done in feedlot B. On day 0, two groups of 35 animals were made in feedlots A and B. Fecal samples were taken on days 0, 22, 54 and 75 pos-treatment (PT), and body weight was registered, from each animal. Fecal samples were processed for individual count of eggs per gram (EPG) and pooled fecal culture was carried out for identification of the parasite genus in each sampling. Fecal egg count reduction test (FECR) was calculated on day 22 PT. The study design used was a totally randomized block, with commercial feedlot and sex as block variables. For data analysis, a mixed model of the SAS statistical program was used. The FECR average on day 22 was 28.4% in the IVM group, and 94,2 % in the RBZ group . From this date on, significant differences in EPG were kept until day 54. EPG counts were only equal near the end of the trial, on day 75 (p=0.16). In both commercial feedlots, especially in the IVM group, Cooperia spp. was the most prevalent parasite in the fecal cultures. Significant differences in weight (P<0.01) on post-treatment day 75 was found between the average weight in the RBZ and the IVM group (246 vs. 238 kg respectively), what means a difference of 8.3% in gains. The importance for production in the antiparasite failure treatment in commercial feedlots was demonstrated, and the need of pos-treatment controls to evaluate the efficacy of the antiparasitic administered is emphasized.

scholarly journals 10 A field study to investigate the effect of Zuprevo administered alone or in combination with banamine transdermal on the health and well-being of transported feedlot calves on arrival at the feedlot

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 6-6
Author(s):  
Miriam S Martin ◽  
Michael Kleinhenz ◽  
Katie Kleinhenz ◽  
Emily Reppert ◽  
Dale Blasi ◽  
...  
Keyword(s):  
Drug Application ◽  
Computer Software ◽  
Well Being ◽  
Morbidity And Mortality ◽  
Accelerometer Data ◽  
Long Distance ◽  
Long Distance Transport ◽  
Increased Risk ◽  
Vas Scores ◽  
Feedlot Calves

Abstract Long distance transportation can be a significant source of stress to cattle and is associated with increased risk of bovine respiratory disease (BRD). The administration of a nonsteroidal anti-inflammatory drug (NSAID) has been shown to reduce stress following long distance transport. The objective of this study was to compare production parameters, morbidity, and mortality between calves receiving either tildipirosin alone or in combination with transdermal flunixin on arrival at the feedlot. 384 head of polled, Continental x English and English crossbred bulls and steers were enrolled into one of two treatments: 1) tildipirosin only (PLBO) 2) tildipirosin in combination with transdermal flunixin (FTD). Tildipirosin was administered in the neck as a single dose of 4 mg/kg alone, or in combination with transdermal flunixin applied to the dorsal midline at the label dose of 3.3 mg/kg. Outcomes measured were performance parameters, dry mater intake and feed efficiency, morbidity and mortality, pen pulls and treatments, a daily visual analog scale (VAS) assessment and accelerometer data. Statistical analysis was performed using computer software (JMP 13, SAS Institute, Cary, NC). There were no significant differences in average lot weights between treatment groups (P = 0.415). There were no treatment effects on the determined dry matter intake (P = 0.51). There were no significant differences observed in morbidity and mortality between groups (P = 0.292). VAS pain assessment showed significant differences for time (P < 0.0001) and time by treatment interaction (P < 0.0001), with FTD calves having lower (VAS) scores. There were no significant differences between treatments for the acceleration data (P = 0.190). Calves administered transdermal flunixin had lower VAS scores indicating less pain the first 36 hours after drug application. Over the 63-d feeding period, no advantages in performance were observed following FTD administration.

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