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PRP anal

Johann Kolstee, Steven Philpot, Jeffrey Grierson, Benjamin R Bavinton, Duane Duncan, Garrett Prestage
BACKGROUND: How gay and bisexual men (GBM) establish partnership agreements may be affected by several factors, including age. The ability to communicate with a partner about sexual agreements has important sexual health implications for GBM. OBJECTIVE: To assess differences in partnership agreements among GBM. METHODS: We surveyed GBM about their partnerships using a national, anonymous online survey in 2013-14. We compared men who had monogamous partnerships with men who had non-monogamous partnerships, according to age and other factors...
August 2017: Sexual Health
Yanlin Wu
The nonlinear conjugate gradient (CG) algorithm is a very effective method for optimization, especially for large-scale problems, because of its low memory requirement and simplicity. Zhang et al. (IMA J. Numer. Anal. 26:629-649, 2006) firstly propose a three-term CG algorithm based on the well known Polak-Ribière-Polyak (PRP) formula for unconstrained optimization, where their method has the sufficient descent property without any line search technique. They proved the global convergence of the Armijo line search but this fails for the Wolfe line search technique...
2017: Journal of Inequalities and Applications
Nicholas J Haley, Chris Siepker, W David Walter, Bruce V Thomsen, Justin J Greenlee, Aaron D Lehmkuhl, Jürgen A Richt
Chronic wasting disease (CWD), a transmissible spongiform encephalopathy of cervids, was first documented nearly 50 years ago in Colorado and Wyoming and has since spread to cervids in 23 states, two Canadian provinces, and the Republic of Korea. The expansion of this disease makes the development of sensitive diagnostic assays and antemortem sampling techniques crucial for the mitigation of its spread; this is especially true in cases of relocation/reintroduction of farmed or free-ranging deer and elk or surveillance studies of private or protected herds, where depopulation is contraindicated...
April 2016: Journal of Clinical Microbiology
Aiko Gryspeirt, Simon Gubbins
Current strategies to control classical scrapie remove animals at risk of scrapie rather than those known to be infected with the scrapie agent. Advances in diagnostic tests, however, suggest that a more targeted approach involving the application of a rapid live test may be feasible in future. Here we consider the use of two diagnostic tests: recto-anal mucosa-associated lymphatic tissue (RAMALT) biopsies; and a blood-based assay. To assess their impact we developed a stochastic age- and prion protein (PrP) genotype-structured model for the dynamics of scrapie within a sheep flock...
September 2013: Epidemics
Theodore R John, Hermann M Schätzl, Sabine Gilch
Chronic wasting disease (CWD) is a prion disease of captive and free-ranging deer (Odocoileus spp), elk (Cervus elaphus nelsonii) and moose (Alces alces shirasi). Unlike in most other prion diseases, in CWD prions are shed in urine and feces, which most likely contributes to the horizontal transmission within and between cervid species. To date, CWD ante-mortem diagnosis is only possible by immunohistochemical detection of protease resistant prion protein (PrP (Sc) ) in tonsil or recto-anal mucosa-associated lymphoid tissue (RAMALT) biopsies, which requires anesthesia of animals...
May 2013: Prion
Gordon B Mitchell, Christina J Sigurdson, Katherine I O'Rourke, James Algire, Noel P Harrington, Ines Walther, Terry R Spraker, Aru Balachandran
Chronic wasting disease (CWD), a transmissible spongiform encephalopathy of cervids, remains prevalent in North American elk, white-tailed deer and mule deer. A natural case of CWD in reindeer (Rangifer tarandus tarandus) has not been reported despite potential habitat overlap with CWD-infected deer or elk herds. This study investigates the experimental transmission of CWD from elk or white-tailed deer to reindeer by the oral route of inoculation. Ante-mortem testing of the three reindeer exposed to CWD from white-tailed deer identified the accumulation of pathological PrP (PrP(CWD)) in the recto-anal mucosa associated lymphoid tissue (RAMALT) of two reindeer at 13...
2012: PloS One
M P Dagleish, J Finlayson, P J Steele, Y Pang, S Hamilton, S L Eaton, J Sales, L González, F Chianini
Rectoanal mucosa-associated lymphoid tissue (RAMALT) is a part of the lymphoid system that can be sampled easily in live animals, especially ruminants. RAMALT biopsy is useful for the diagnosis of transmissible spongiform encephalopathies, including scrapie in sheep and goats and chronic wasting disease (CWD) in cervids. Diagnosis is reliant on detection of abnormal prion protein (PrP(d)), which is associated with lymphoid follicles. For enzyme linked immunosorbent assays (ELISAs) detecting PrP(d) it is necessary to ensure that lymphoid follicles are present in biopsy samples to avoid false-negative results...
May 2012: Journal of Comparative Pathology
M Mongardini, R P Iachetta, A Cola, A Maturo, M Giofrè, F Custureri
Rectovaginal fistula (RVF) is an abnormal communication between vagina and anorectum. Most frequent causes are iatrogenic. Often surgery is the therapy of choice. The suggested treatments include trans-anal access or combined trans-anal and vaginal access. We present the case of a woman with complicated iatrogenic fistula treated by a combined trans-anal and vaginal access, interposition of buccal mucosa and opposition of PRP (platelet rich plasma).
November 2009: Il Giornale di Chirurgia
Lorenzo González, Stuart Martin, Sílvia Sisó, Timm Konold, Angel Ortiz-Peláez, Laura Phelan, Wilfred Goldmann, Paula Stewart, Ginny Saunders, Otto Windl, Martin Jeffrey, Stephen A C Hawkins, Michael Dawson, James Hope
Following a severe outbreak of clinical scrapie in 2006-2007, a large dairy goat herd was culled and 200 animals were selected for post-mortem examinations in order to ascertain the prevalence of infection, the effect of age, breed and PRNP genotype on the susceptibility to scrapie, the tissue distribution of diseaseassociated PrP (PrP(d)), and the comparative efficiency of different diagnostic methods. As determined by immunohistochemical (IHC) examinations with Bar224 PrP antibody, the prevalence of preclinical infection was very high (72/200; 36...
November 2009: Veterinary Research
Delwyn P Keane, Daniel J Barr, Philip N Bochsler, S Mark Hall, Thomas Gidlewski, Katherine I O'Rourke, Terry R Spraker, Michael D Samuel
In September 2002, chronic wasting disease (CWD), a prion disorder of captive and wild cervids, was diagnosed in a white-tailed deer (Odocoileus virginianus) from a captive farm in Wisconsin. The facility was subsequently quarantined, and in January 2006 the remaining 76 deer were depopulated. Sixty animals (79%) were found to be positive by immunohistochemical staining for the abnormal prion protein (PrP(CWD)) in at least one tissue; the prevalence of positive staining was high even in young deer. Although none of the deer displayed clinical signs suggestive of CWD at depopulation, 49 deer had considerable accumulation of the abnormal prion in the medulla at the level of the obex...
September 2008: Journal of Veterinary Diagnostic Investigation
José Manuel Castro Ruíz, Angélica Hernández Guerrero, Sergio Sobrino Cossio, Octavio Alonso, Leopoldo Rivero Trejo
OBJECTIVE: Our objective was to evaluate response to bipolar electrocoagulation (BICAP) in patients with persistent rectorragia (PR) secondary to PRP (post-radiation proctitis) degree II (telangiectasias). MATERIAL AND METHODS: We had 64 cases prospective and conducted study cohort of 257 patients, with cervicouterine cancer, radiated, PRP degree II, and PR. DESIGN: We conducted prospective, cross-sectional and descriptive study. Patients were divided in three groups: (group 1), with hemodynamical instability; (group 2) with chronic anemia, and (group 3), without data of chronic anemia (Table 1)...
July 2003: Revista de Gastroenterología de México
R K Meyer, A Lustig, B Oesch, R Fatzer, A Zurbriggen, M Vandevelde
Both the purified normal (protease-sensitive) isoform of the prion protein (PrP(C)) (Pergami, P., Jaffe, H., and Safar, J. (1996) Anal. Biochem. 236, 63-73) and recombinant prion protein (PrP) have been found to be in monomeric form (Mehlhorn, I., Groth, D., Stockel, J., Moffat, B., Reilly, D., Yansura, D., Willet, W. S., Baldwin, M., Fletterick, R., Cohen, F. E., Vandlen, R., Henner, D., and Prusiner, S. B. (1996) Biochemistry 35, 5528-5537; and this paper), and therefore PrP(C)-PrP(C) interactions were previously unknown...
December 1, 2000: Journal of Biological Chemistry
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