View clinical trials related to Staphylococcal Infections.
Filter by:One hundred new residents will be recruited prior to the start of residency and followed prospectively for a year. Monthly nasal swabs will be performed to identify colonization with methicillin resistant staphylococcus aureus (MRSA).The proportion of study subjects colonized with MRSA at the end of 1 year will be calculated.
The incidence of community-associated (CA) staphylococcal infections, especially those caused by methicillin-resistant Staphylococcus aureus (MRSA), has increased dramatically in recent years. Although the majority of these infections are limited to the skin and soft tissue and thus not life threatening, the number of invasive cases in otherwise healthy individuals is increasing and some are fatal. As a first step toward understanding pathogenesis, there has been significant focus on elucidating the key CA-MRSA virulence factors. The relative significance of these factors is still being delineated. By comparison, there has been little focus on host factors associated with these invasive infections. In this protocol, we will recruit 100 otherwise healthy subjects with invasive staphylococcal infection, 50 otherwise healthy subjects with recurrent staphylococcal infections, and obtain samples from 150 unidentified healthy controls from the blood bank to investigate host immunologic factors predisposing people to staphylococcal infection. Subjects will receive standard of care treatment for acute or recurrent staphylococcal infections. The primary objective of this research is to identify host genetic factors that contribute to susceptibility or severity of community acquired staphylococcal diseases. We will use three experimental approaches to complete this objective: 1) expression microarray analyses of study population s (subjects and controls) white cells (neutrophils and peripheral blood mononuclear cells) at rest and stimulated with staphylococci, 2) evaluation of toll-like receptor (TLR) pathways in the study population s cells, and 3) evaluation of Th17 cells. The proposed research will address a key area of staphylococcal pathogenesis for which there is a striking lack of information. We fully anticipate that the research also will provide critical new information directly relevant to vaccine, diagnostics, and therapeutics development.
Objective: The objective of the study is to evaluate the ability of current vancomycin dosing strategies to attain the pharmacodynamic target of an area under the curve (AUC) to minimum inhibitory concentration (MIC) ratio greater than 400:1 for patients with a suspected or documented Staphylococcus aureus infection. Primary Outcome: The primary outcome is the percentage of vancomycin dosing regimens that achieve AUC:MIC ratio > 400 on the first occurrence of vancomycin use in patients with a suspected or documented S. aureus infection at The Nebraska Medical Center. Secondary Outcomes: 1. To assess the probability that vancomycin AUC:MIC ratios obtained from The Nebraska Medical Center patients exceed a therapeutic threshold using S. aureus MICs from isolates obtained from The Nebraska Medical Center. 2. Using MIC data from the TRUST Study database (large national surveillance database) and the vancomycin AUC data obtained from TNMC patients, perform a Monte Carlo analysis that will assess the probability of achieving a therapeutic vancomycin threshold with a large number of isolates.
The purpose of the study is to determine if topically applied nitric oxide gas is effective in reducing the quantity of bacteria (including MRSA)in a wound.
Methicillin resistant Staphylococcus aureus (MRSA) which is one of the principal multidrug resistant organisms found in the hospitals all over the world, has recently emerged in the community. However, for the moment (2002), the hospital remains the principal reservoir of MRSA so far and the patients discharged with a MRSA carriage can be the source of MRSA spreading in the community. In particular patients admitted to home care (HC) from acute care facilities represent a patient group with a high risk of MRSA carriage and of being the source of MRSA spreading in the community. The objective of this study is to determine whether HC patients are effectively a MRSA reservoir and a source for MRSA spreading in the community. For that, from February 2003 to March 2004 any adult patient (except obstetric patient) (approximately 3360 patients for 16 HC settings), will be screened [nasal and skin lesion (if any) swabs] for MRSA carriage within the 48 h before his/her transfer. The patients found to be MRSA carriers will be visited by a physician who will ask patients as well as family members to participate in the study. Each patient and each family member who will have given agreement to participate, will be sampled (nasal swab for both patient and family members, and skin lesion swab for the patients with skin lesions) every month for 12 months by the nurse of the HC setting in which the patient will have been admitted. As soon as the patient will be discharged from HC setting and if the 12 month survey is not finished, patient and family member swab sampling will be performed by the nurse of the research team (NRT) every 3 months until the end of the survey period. These swabs will be transmitted by the NRT to the research center and analyze by the microbial technician of the research center. The bacteriological survey will be accompanied with an epidemiological survey in order to determine the risk factors for a long term MRSA carriage in the patients admitted in HC and also the risk factors for transmitting MRSA to their family. This multi-centre and multi-investigator study will be performed over a period of 32 months (1 month to prepare the study, 13 months to screen patients with regard to MRSA carriage before their transfer from acute care settings into HC settings, 12 months to survey HC patients and their family members and 6 months to analyze data and prepare publications). Such a study will provide us with descriptive and quantitative data on MRSA strains introduced in the community by HC patients. From the analysis of risk factors of MRSA transmission from these patients to their family members, suggestions to limit this transmission might be drawn.
This study is a continued evaluation of the immune response to StaphVAX , a Staphylococcus aureus type 5 and 8 capsular polysaccharide conjugate vaccine, in end-stage renal disease patients, by giving a 3rd and 4th dose to a subset of the participants in the previous efficacy trial. Participants continue to receive the vaccine or placebo in a blinded manner, and are also randomly assigned to 1 of 2 different intervals between the doses. The immunogenicity is measured by the antibodies in the blood, and typical vaccine safety information is also collected.