@article{gookin_stebbins_hunt_burlone_fulton_hochel_talaat_poore_levy_2004, title={Prevalence of and risk factors for feline Tritichomonas foetus and Giardia infection}, volume={42}, ISSN={["1098-660X"]}, DOI={10.1128/JCM.42.6.2707-2710.2004}, abstractNote={ABSTRACT Data were gathered for 117 cats from 89 catteries at an international cat show to examine prevalence and risk factors for feline Tritrichomonas foetus and Giardia infection. Prevalence of T. foetus was 31% among cats (36 out of 117) and catteries (28 out of 89) based on results of fecal smear examination (5 out of 36), fecal culture in modified Diamond's medium (9 out of 36), fecal culture in In Pouch TF medium (20 out of 36), or PCR amplification of the ribosomal RNA gene from feces with T. foetus -specific primers (34 out of 36). Catteries in which T. foetus was identified were more likely to have had a recent history of diarrhea, historical diagnosis of coccidia infection in adult cats, and a decreased number of square feet of facility per cat. Evidence did not exist for the ongoing transmission of T. foetus by water, food, or contact with other species.}, number={6}, journal={JOURNAL OF CLINICAL MICROBIOLOGY}, author={Gookin, JL and Stebbins, ME and Hunt, E and Burlone, K and Fulton, M and Hochel, R and Talaat, M and Poore, M and Levy, MG}, year={2004}, month={Jun}, pages={2707–2710} } @article{cole_blikslager_hunt_gookin_argenzio_2003, title={Cyclooxygenase blockade and exogenous glutamine enhance sodium absorption in infected bovine ileum}, volume={284}, ISSN={0193-1857 1522-1547}, url={http://dx.doi.org/10.1152/ajpgi.00172.2002}, DOI={10.1152/ajpgi.00172.2002}, abstractNote={We have previously shown that prostanoids inhibit electroneutral sodium absorption in Cryptosporidium parvum-infected porcine ileum, whereas glutamine stimulates electroneutral sodium absorption. We postulated that glutamine would stimulate sodium absorption via a cyclooxygenase (COX)-dependent pathway. We tested this hypothesis in C. parvum-infected calves, which are the natural hosts of cryptosporidiosis. Tissues from healthy and infected calves were studied in Ussing chambers and analyzed via immunohistochemistry and Western blots. Treatment of infected tissue with selective COX inhibitors revealed that COX-1 and -2 must be blocked to restore electroneutral sodium absorption, although the transporter involved did not appear to be the expected Na(+)/H(+) exchanger 3 isoform. Glutamine addition also stimulated sodium absorption in calf tissue, but although this transport was electroneutral in healthy tissue, sodium absorption was electrogenic in infected tissue and was additive to sodium transport uncovered by COX inhibition. Blockade of both COX isoforms is necessary to release the prostaglandin-mediated inhibition of electroneutral sodium uptake in C. parvum-infected calf ileal tissue, whereas glutamine increases sodium uptake by an electrogenic mechanism in this same tissue.}, number={3}, journal={American Journal of Physiology-Gastrointestinal and Liver Physiology}, publisher={American Physiological Society}, author={Cole, Jeffrey and Blikslager, Anthony and Hunt, Elaine and Gookin, Jody and Argenzio, Robert}, year={2003}, month={Mar}, pages={G516–G524} } @article{hunt_fu_armstrong_rennix_webster_galanko_chen_weaver_argenzio_rhoads_2002, title={Oral bovine serum concentrate improves cryptosporidial enteritis in calves}, volume={51}, ISSN={["0031-3998"]}, DOI={10.1203/00006450-200203000-00017}, abstractNote={Cryptosporidium parvum produces a prolonged watery diarrhea unresponsive to conventional antimicrobials. Because of reported efficacy of antibody-based immunotherapy, we studied the effect of inexpensive, commercially available oral bovine serum concentrate (BSC) in experimental cryptosporidiosis. Twenty-four calves were treated with 57 g/d BSC (n = 12) or soy protein (n = 12) added to their standard whey protein-based milk replacer (227 g/2 L twice daily). Of the 24, 9 were also treated with L-glutamine (GLN), 8 g/L (50 mM) in the milk (5 calves in the BSC group and 4 in the soy group). Animals were inoculated with 10(8) cryptosporidium oocysts per os on d 8 of life and received oral rehydration on d 12-14. Eight uninfected controls were treated with BSC or soy protein. Fecal and urine volume and urinary Cr-EDTA excretion were measured. Animals were killed on d 18 of life. Cryptosporidiosis induced severe watery diarrhea lasting >9 d and produced a 25% increase in intestinal permeability, a 33% decrease in villous surface area, and a 40% reduction in mucosal lactase specific activity. Glutamine treatment had no effect on the diarrhea or any of the intestinal tests; and therefore pooled data were used to compare the 12 calves treated with BSC with the 12 treated with soy. In animals receiving BSC, peak diarrheal volume and intestinal permeability were reduced 33%, fewer oocysts were shed, intestinal crypts were significantly deeper, and villous surface area returned to normal by 9 d after infection (all p