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Research

Dr. Risco and Dr. Galvao are involved in numerous dairy cattle clinical trials and research.  If you have questions regarding dairy cattle research at the College of Veterinary Medicine at UF or would like to be notified of new clinical trials, please email Dr. Carlos Risco or Dr. Klibs Galvao.

  • Galvão KN, Santos JE, Risco C, L. Ibarbia, and J. Bittar. Effect of GnRH administration around 20 days in milk on uterine health and fertility in lactating dairy cows. Cows with delayed cyclicity have impaired fertility. In this trial we are investigating if induction of ovulation early in lactation using GnRH would improve fertility in dairy cows.
  • Galvão KN, Santos JE, Risco, and F. Lima. Effect of intrauterine Arcanobacterium pyogenes inoculation on hormonal and immunological factors associated with luteolysis and prolonged luteal phase. A. pyogenes is one of the main bacterium responsible for endometritis in dairy cows. One of the effects observed in cows with endometritis is shortened or prolonged luteal phase. In this study, we are trying to understand how A. pyogenes can have this dual effect.
  • Galvão KN, Santos JE, Risco C, L. Ibarbia, and J. Bittar. Resynchronization of dairy heifers using ultrasonography, CIDR inserts and GnRH. Use of timed artificial insemination (AI) is becoming more common in large dairy farms in the US. These programs eliminate the need for daily estrus detection; however, one of the main problems is extended interbreeding intervals. In this study, we are investigating is we can diagnose open cows based on the absence of a CL 20 days after AI and reinseminated them 21 days after AI.
  • Galvão KN and Chebel R. Effect of LPS infusion on pro-inflammatory cytokine gene expression. LPS is part of the outer membrane of Gram-negative bacteria such as E. coli. E. coli is one of the main causative pathogens of postpartum metritis and endometritis. In this study, we are investigating how LPS affect the uterine innate immune response.
  • Galvão KN, Seabury C, and Pinedo P. Association of single nucleotide polymorphisms with uterine disease in dairy cows. In this study, we are trying to identify specific SNPs that affect uterine disease in dairy cows.
  • Galvão KN, Santos JE, Risco C, Martinez-Patino N. Effect of neutrophils glycogen stores on neutrophil phagocytosis and killing capacity. Glycogen is the main energy source for phagocytosis and bacterial killing. In this study, we are investigating how the neutrophil glycogen stores around parturition affect the neutrophil function in dairy cows.
  • Galvão KN, Devries A, Schuenemann G, and Federico P. Economic comparison of reproductive programs for dairy herds using estrus detection, Ovsynch, or a combination of both. Optimal reproductive performance is critical for dairy farm profitability. In this study, we developed a stochastic simulation model to evaluate the economic return of different reproductive programs.
  • Galvão KN and Devries A. Economic comparison of long versus short of voluntary waiting periods (VWP). Selection of VWP is somewhat arbitrary I n dairy operations. In this study we are investigating the economic impact of having long versus short voluntary waiting period..
  • Galvão KN, Bisinotto R, Santos JE. Use of CIDR inserts for treatment of anovular dairy cows. Cows with delayed cyclicity have impaired fertility. In this study we are investigating the use of a progesterone insert (CIDR) to try to improve fertility in anovular cows.
  • Galvão KN, Bicalho R, Martinez-Patino N, Risco C, and Santos JE. Development of parsimonious model to predict uterine disease based on calving events and metabolic profile. We know most of the risk factors for metritis in dairy cows, however, we do not understand how much each of them contribute to the condition; therefore, developing a model to predict metritis based on available data at the farm level could help target efforts to diagnose and treat metritis.
  • Galvão KN, Bas S, and Schuenemann G. Effect of vulval hygiene score and vulval conformation on fertility. Vulval conformation affects vulval hygiene, which ultimately affect fertility in mares. In this study we want to investigate if the same effect is observed in dairy cows.
  • Galvão KN, Pena G, Risco C, and Pinedo P. Effect of propylene glycol for treatment of cows with subclinical ketosis. Propylene glycol is a glucose precursor commonly used to treat ketosis in dairy cows. In this study we want to investigate if propylene glycol can treat subclinical ketosis and increase milk production in dairy cows.
  • Galvão KN, Risco C, Ibarbia L, Bittar J, and Priestley D. Effect of feeding colostrum or colostrum replacers on morbidity, mortality, and weight gain in dairy heifers. Feeding of colostrum replacers has been advocated to decrease the spread of infectious diseases from cows to calves. In this study we are investigating the effect of feeding two brands of colostrum replacers on calf health, survival, and performance.
  • Galvão KN, Pena G, Risco C, and Pinedo P. Comparison of Precision Xtra® with Ketostix® for diagnosis of clinical and subclinical ketosis. A human ketone meter has been validated for use in bovine; however, a comparison with urine ketone strips has not been performed. In this study, we want to determine cut-off point for the ketone meter that would be equivalent to the ketone strip.
  • Staples C, Galvão KN, Wang D, and Santos JE. Effect of betacarotene and retinol on immune function and lactation performance of dairy cows. Betacarotene and retinol can affect the immune function of dairy cows. In this study, we are investigating if supplementation of these nutrients would improve immune function around parturition in dairy cows.