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SWCPC 438 Negatives #66 Captain Charles Schreiner (duplicate), undated.
No full textThe collection features portraits of sixty-one prominent cattle ranchers, both male and female, who were considered to be the “Cattle Kings of Texas.
Manuscript of 100-Year History of FBC Lubbock by Weston A. Pettey - Part 2 - Chapters 10-17.
No full textManuscript notes from Dr. Weston A. Pettey's book The First Baptist Church of Lubbock, Texas 1891-1991
SWCPC 438 Negatives #45 Captain Charles Schreiner, undated.
No full textThe collection features portraits of sixty-one prominent cattle ranchers, both male and female, who were considered to be the “Cattle Kings of Texas.
An exploration of the interplay between treatment and vaccination in an Age-Structured Malaria Model using non-linear ordinary differential equations
No full textMalaria continues to be a significant global health challenge, particularly in tropical regions. Resistance to key antimalarial drugs is spreading, complicating treatment efforts. While progress toward eradication has been slow, the development and introduction of novel malaria vaccines offer hope for reducing the disease burden in endemic areas. To address these challenges, we develop an extended Susceptible–Exposed–Infected–Recovered (SEIR) age-structured model incorporating malaria vaccination for children, drug-sensitive and drug-resistant strains, and interactions between human hosts and mosquitoes. Our research evaluates how malaria vaccination coverage influences disease prevalence and transmission dynamics. We derive both strains’ basic, intervention, and invasion reproduction numbers and conduct sensitivity analysis to identify key parameters affecting infection prevalence. Our findings reveal that model outcomes are primarily influenced by scale factors that reduce transmission and natural recovery rates for the resistant strain, as well as by drug treatment and vaccination efficacies and mosquito death rates. Numerical simulations indicate that while treatment reduces the malaria disease burden, it also increases the proportion of drug-resistant cases. Conversely, higher vaccination efficacy correlates with lower infection cases for both strains. These results suggest that a synergistic approach involving vaccination and treatment could effectively decrease the overall proportion of the infected population
SWCPC 438 Negatives #60 C. C. Slaughter (duplicate), undated.
No full textThe collection features portraits of sixty-one prominent cattle ranchers, both male and female, who were considered to be the “Cattle Kings of Texas.
Effects of a Novel Direct-fed Microbial on Occurrences of Antimicrobial Resistance in Salmonella enterica, Escherichia coli, and Enterococcus spp. Measured Longitudinally From Feedlot Arrival to Harvest in Finishing Beef Steers
No full textBefore implementation of the Veterinary Feed Directive in 2017, medically important antimicrobials, like tylosin, were approved for both therapeutic and subtherapeutic use. Nevertheless, subtherapeutic practices are now considered injudicious because their use increases antimicrobial resistance risk. Therefore, heightened consumer concerns have increased the interest in antimicrobial alternatives like direct-fed microbials. Two-hundred forty Angus beef steers (mean initial BW = 263 kg ± 18.0 kg) were assigned randomly to one of three dietary treatments; negative control, dietary supplement contained no tylosin (NCON); positive control, dietary supplement contained tylosin (PCON); or novel direct-fed microbial fed at 1 g mixture/steer with 1 × 1011 CFU/g (DFM). Fecal samples were collected on days 0, 59, 128, and at study end. Pen and hide swabs were collected two days before harvest, and subiliac lymph nodes were collected on the day of harvest. All targeted bacterial populations differed across time (p ≤ 0.05), except 128ERYR Escherichia coli. Fecal Salmonella concentration and prevalence differed among dietary treatments (p = 0.02) with NCON having greater fecal Salmonella concentrations than PCON and DFM. No differences in Salmonella prevalence among pen swabs, hide swabs, or subiliac lymph nodes were detected (p ≥ 0.40). Salmonella resistant to tetracycline or cefotaxime were not detected in feces. The effect of treatment differed by day for total and 128ERYR Enterococcus spp. concentrations. Total Enterococcus spp. concentrations were greatest for the DFM treatment on day 128 and at study end (p ≤ 0.01). At study end, 128ERYR Enterococcus spp. concentrations were greatest for PCON (p ≤ 0.01). Total, TETR, COTR, and CTXR E. coli concentrations increased from d 0 to study end among treatments (p ≤ 0.01). These data suggest that the in-feed inclusion of a novel direct-fed microbial is not directly implicated in the antimicrobial resistance of feedlot beef cattle