Evaluation of endocrine and immune responses of steers challenged with infectious bovine rhinotracheitis virus

Falkenberg, Shollie M.; Carroll, J.A.; Elsasser, T.H.; Best, Tim; Sartin, James L.; Buntyn, Joe O.; Schmidt, Ty B

doi:10.2460/ajvr.74.12.1522

Cited by 3 publications

(1 citation statement)

References 21 publications

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“…Although, many Sarcocystis infection in bovine animals is usually asymptomatic; the acute phase of parasitism characterizes by fever, discomfort, muscle tremor, anorexia, shivering, and lethargy (Chimelli and Keohane, 2020). Economic loss is further marked by increased body metabolism, and decreased milk yield with growth retardation which is possibly caused by the parasite that is capable of tipping the balance between nutrition-endocrine interactions and growth (Aráoz et al, 2019;Falkenberg et al, 2013;Januskevicius et al, 2018). However, the dose of sporocysts and the immune status of a host could of great importance in developing clinical symptoms of sarcocystosis (Decker Franco et al, 2018;Dubey et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Serological Detection of Sarcocystiosis in Buffaloes

2023

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The study aimed to serologically detect the prevalence of Sarcocystis infection in buffaloes using the indirect enzyme-linked immunosorbent assay (ELISA) for the first time in Iraq. An overall 184 buffaloes of different ages and sexes were selected randomly from the regions of Wasit province (Iraq) from March to June (2022), and subjected to draining of venous blood under aseptic conditions. After centrifugation, the obtained sera were examined by indirect ELISA. Totally, 33.15% of study animals were positive for IgG antibodies. According to their concentrations, the ODs level showed a significant increase (P<0.0186) in mild infection (63.93%) when compared to moderate (27.87%) and strong (8.2%) infections. Subsequently, values of mild, moderate, and strong infections were 0.330 ± 0.01, 0.554 ± 0.019 and 0.912 ± 0.031 nm, respectively. Regarding age and sex factors, significantly higher positivity (P<0.0469) was shown in buffaloes aged >10 years old (57.89%); while the lowest was seen in those <1 year (13.64%). Subsequently, older buffaloes appeared significantly (P<0.0192) at higher risk (2.1685) when compared to other age groups. Females recorded an obvious increase (P<0.05) in positivity (35.95%) and risk (1.8569) in comparison with males; 19.35% and 0.5385, respectively. The results indicate that ELISA is of great value in the diagnosis of sarcocystosis.

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Section: Introductionmentioning

confidence: 99%

Serological Detection of Sarcocystiosis in Buffaloes

2023

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Corticotropin-releasing hormone and vasopressin challenge affects metabolic, hematologic, and rumen fermentation parameters of growing beef steers

Geeslin,

Richeson,

Hernandez Gifford

et al. 2024

Translational Animal Science

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The objective of this study was to evaluate the impacts of stress challenge duration on metabolic, hematologic, and rumen fermentation parameters of beef steers. Thirty steers (416 ± 19 kg) were used in a randomized complete block design with 2 blocks and 3 treatments. Treatments were intravenous injection of: 1) saline at 0, 24, 48, and 72 h (n = 10; Control); 2) Corticotropin releasing hormone (CRH) and vasopressin (VP) at 0 h and saline at 24, 48, and 72 h (n = 10; Acute); or 3) CRH and VP at 0, 24, 48, and 72 h (n = 10; Chronic). Serum samples were collected at various time points for analysis of serum chemistry and non-esterified fatty acids (NEFA). Whole blood was collected for analysis of complete blood count and ruminal fluid was collected via oral lavage to evaluate volatile fatty acid (VFA) composition. Serum cortisol was greater (treatment × hour; P ≤ 0.01) for cattle receiving acute and chronic than control at 1 h (P < 0.01) and greater for chronic than acute and control at 25, 26, 49, 50, 73, and 74 h (P < 0.01). Similarly, there was a treatment × hour interaction (P ≤ 0.01) for serum glucose concentrations such that cattle receiving acute and chronic had greater glucose at 1 h than control (P < 0.01), and cattle receiving chronic had greater glucose at 25, 49, 50, 73, and 74 h than acute and control (P ≤ 0.04). Serum insulin concentrations were greater (treatment × hour P ≤ 0.01) in chronic and acute than control at 1 h (P < 0.01) and greater for chronic compared to acute and control at 25, 49, and 73 h (P ≤ 0.01). Serum NEFA tended (P = 0.09) to be greater in stressed cattle compared to control. There was a treatment × hour interaction (P = 0.003) for total white blood cell count such that chronic had greater concentration than control at 72 h (P < 0.01). Conversely, monocyte concentration was less (treatment × hour interaction P ≤ 0.01) for chronic than acute and control at 144 h (P < 0.01) and eosinophil concentration was greater (treatment × hour interaction P = 0.02) for chronic than control steers at 48 h (P = 0.02) and greater for chronic than acute at 72 and 144 h (P ≤ 0.03). Minimal differences were observed in VFA concentrations with the exception of acetate (treatment × hour interaction P = 0.05). These results demonstrate that administration of CRH and VP affects complete blood count and serum chemistry, and longer duration of treatment exposure prolongs the physiological responses to a stress challenge.

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DNA microarray assay and real-time PCR as useful tools for studying the respiratory tract Mycoplasma populations in young dairy calves

Bottinelli

Passamonti

Rampacci

et al. 2017

Journal of Medical Microbiology

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Evaluation of endocrine and immune responses of steers challenged with infectious bovine rhinotracheitis virus

Abstract: Results indicated that IBVR challenge altered growth hormone concentration at some time points but was not associated with large increases in circulating proinflammatory cytokines.

Cited by 3 publications

References 21 publications

Serological Detection of Sarcocystiosis in Buffaloes

Serological Detection of Sarcocystiosis in Buffaloes

Corticotropin-releasing hormone and vasopressin challenge affects metabolic, hematologic, and rumen fermentation parameters of growing beef steers

DNA microarray assay and real-time PCR as useful tools for studying the respiratory tract Mycoplasma populations in young dairy calves

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