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Microsoft powerpoint - chlamydiae2
Infections with Chlamydiae can be effectively eradicated using herd specific autovaccines in cattle populations NOLTE, O.*, WEISS, H.-E., & SONNTAG, H.-G. corresponding author: Dr. Oliver Nolte Hygiene Institute, Dept. Hygiene & Medical Microbiology Im Neuenheimer Feld 324, 69120 Heidelberg/Germany E-mail: Tel.: +49/6221/567812 Fax.: +49/6221/565627 Third Annual Conference on Vaccine Research Objective: Therapeutic treatment of dairy cows infected with Chlamydia psittaci background Normally 30-80% of a herd can be infected. The rate of abortion may reach 30% or more if Chlamydia infections are common in a herd while the usual rate is below 1 % The economical loss is estimated at 1000-1500 $ / abort*! Amongst the clinical manifestations are mastitis, arthritis and conjunctivitis as well as pneumoniae in calves. In sheep herds epidemics are common, in cattle populations epidemics are reported frequently * calculated as loss of the calf and subsequent loss of milk (30l/d) over a period of at least 4-6 month Standard treatment (Germany) for Chlamydia infected antibiotic treatment using tetracycline i.m. tetracycline sticks deposited in the uterus uterine flushes using 5% iodine in ethanol expensive effectivity varies Definition: autovaccine or autogenous vaccine therapeutic vaccine manufactured from a disease causing pathogenic micro-organism — strain and patient specific in veterinary medicine often herd or flock specific therapeutic — treatment of ongoing infections immunogenic (?) — modulation of the patients immune system. intended to stimulate the immune system, not to hit the micro- organism directly—therefore no development of resistance highly specific, independent of antigenic variability cheap to manufacture no governmental approval required overall amount of dairy cows autovacc overall amount of dairy cows autovacciinated to treat nated to treat chlamydial infect chlamydial infectiions 8 veterinarians involved 30 herds were treated ap. 2500 individuals autovaccinated route of applicat of applicatiion subcutaneous intravaginal intranasal autovaccine placebo Chlamydia negative* Chlamydia positive* * as determined using Stamp staining Σ=48 (out of five different herds) Autovaccines were prepared* from index case (i.e. abortion caused by Chlamydia spec.). procedure cervical swabs (obtained from herds in which the index case was recorded) were screened by Stamp staining of inclusion bodies herds were treated with the herd specific autovaccine four times (one dose on every 5th day). Randomly chosen Chlamydia positive cows were examined in detail cervical swabs were taken from the chosen cows after completion of autovaccination (i.e., day 28 after 1st dose of autovaccine) to check for the presence of Chlamydiae * patent pending DE/PCT/EP Stamp staining routine screening method in veterinary diagnostics* to check for the presence of Chlamydiae (cervical) swabs are smeared on slides and subsequently stained using carbolfuchsin (Ziehl`s stain)—1% acetic acid—0.2% Malachite Green. both forms of the Chlamydia are stained intensively red whereas the background is in light green. Stamp staining is also good for staining of Coxiella and Brucella, these micro-organisms differ in their morphology and appearance * one of the methods recommended by the Bundesministerium für Ernährung, Landwirtschaft und Forsten [Ministry of food, agriculture and forestry] (order BGBl. I S. 1178; September 1999) Outline autovaccination Chlamydia positive* Diagrammatic representation of disease state, immunisation schedule and sampling of blood. ( ) denotes subcutaneous/intranasal or intravaginal immunisation, ( ) and denotes blood/serum sample * often suffering from metritis and/or reduced fertility Results (28 days after start of autovaccina (28 days after start of autovaccinattion) subcutaneous intravaginal intranasal autovaccine Chlamydia negative* Chlamydia positive* Σ=48 (out of five different herds) * as determined using Stamp staining 5 groups of animals Σ=48 Chlamydia positive negative after av: autovaccine: Chlamydia positive negative after pl: placebo: Chlamydia negative negative after av: autovaccine: Chlamydia negative negative after pl: placebo: Results: Serum antibodies against Chlamydia psittaci antigen in micro complement binding assay mean antibody titer +S.E. P<0.05 subcutan (n=19)* intranasal (n=11)** intravaginal (n=9)** positive control 1:40 negative control <1:10 * belonging to 3 different herds ** belonging to 2 different herds Conclusions: Autovaccines seems to be a useful and effective method for the treatment of Chlamydia infection. More than 87% of autovaccinated cows were Chlamydia negative afterwards. The veterinarians reported decline to normal abortion rate and normal metritis/abortion incidence in herds treated with the autovaccine. However, the immunological background remains unknown. Autovaccines are cheap to manufacture and can be given even to pregnant cows. The observed side effects were minor, only after intravaginal application cows showed an increased sensitivity. No serious side effects were observed.
BEAR Work-Sheet (Title): Urine collection technique for Chlamydia infection Name of Resident : Date : Sept. 28, 2011 Question : _Are midstream urine and 1st void urine samples comparable in their accuracy for diagnosis of Chlamydia infections? _________________________________ Search : (Check all that apply) Pubmed/Ovid/Medline: Filtered Resources: Other: (
Title Companion to Statistical Modelling in RAuthor Murray Aitkin, Brian Francis, John Hinde, Ross Darnell <[email protected]>Maintainer Ross Darnell <[email protected]>Suggests lattice, foreign, gdata, car, dglm, gnm, MASS, npmlreg,survivalDescription This package accompanies Aitkin et al, StatisticalModelling in R, OUP, 2009. The package contains some functions and datas