By L. Mine-Boss. Saint Leo University.
Mutation: The term which De Vries introduced into biological literature for an abrupt change of phenotype which is inherited levitra soft 20mg lowest price. Types of mutations include point mutations levitra soft 20 mg on-line, deletions, insertions and changes in number and structure of chromosomes. Non target organisms: Organisms at which treatment is not aimed but which contact the product and may be affected by it. Peptidoglycan: Rigid layer of cell walls of bacteria, a thin sheet composed of N- acetylglucosamine, N-acetylmuramic acid, and a few amino acids. The term coined by Johannsen (1909) for the appearance (Greek phainein, to appear) of an organism with respect to a particular character or group of characters (physical, biochemical and physiologic), as a result of the interaction of its genotype and its environment. A Conjugative plasmid is a self-transmissible plasmid; a plasmid that encodes all the functions needed for its own intercellular transmission by conjugation. Polysaccharide: Long chain of monosaccharides (sugars) linked by glycosidic bonds. Protein: A large molecule composed of one or more chains of amino acids in a specific order; the order is determined by the base sequence of nucleotides in the gene coding for the protein. Proteins are required for the structure, function and regulation of the bodys cells, tissues and organs, and each protein has unique functions. Pseudomonad: Member of the genus Pseudomonas, a large group of Gram-negative, obligately respiratory (never fermentative) bacteria. Recombination: Process by which genetic elements in two separate genomes are brought together in one unit. Repression: Process by which the synthesis of an enzyme is inhibited by the presence of an external substance (the repressor). It plays an important role in protein synthesis and other chemical activities of the cell. Risk: A function of the probability of an adverse health effect and the severity of the effect, consequential to a hazard. Risk analysis: A process consisting of three interconnected components: risk assessment; risk management; and risk communication. It includes the explanation of risk assessment findings and the basis of risk management decisions. Species: In microbiology, a collection of closely related strains sufficiently different from all other strains to be recognized as a distinct unit. Spectrum: A measurable range of activity, such as the range of bacteria affected by an antibiotic. Succession: Gradual process brought about by the change in the number of individuals of each species of a community and by the establishment of new species that gradually replace the original inhabitants. Symbiosis: The living together in intimate association of two dissimilar organisms. Both populations are capable of surviving in their natural environment on their own although, when formed, the association offers mutual advantages. Systemic: Not localized in a particular place of the body; an infection disseminated widely through the body is said to be systemic. Target organism: The plant, animal or micro-organism that is treated or at which treatment is aimed. Teratogenic effects: The effects of exposure to medications or other drugs, chemicals or infections that may be harmful to an unborn child. Tissue residue: The drug, pesticide, or toxic breakdown product remaining in the edible tissue after natural or technological processes of removal or degradation have occurred. Transduction: Transfer of host genetic information via a virus or bacteriophage particle. Transposable element: Genetic element that can move (transpose) from one site of a chromosome to another. Transposon: Transposable element that, in addition to genes involved in transposition, carries other genes; it often confers selectable phenotypes such as antibiotic resistance. Transposon mutagenesis: Insertion of a transposon into a gene; this inactivates the host gene leading to a mutant phenotype and also confers the phenotype associated with the transposon gene. Vector: (i) Plasmid or virus used in genetic engineering to insert genes into a cell. Vegetative cell: Growing or feeding form of a microbial cell, as opposed to a resting form such as a spore. Virulence factors: Factors responsible for overcoming the hosts immune response, allowing micro-organisms to colonize. Glossary 97 Virus: Any of a large group of submicroscopic infective agents that typically contain a protein coat surrounding a nucleic acid core, and are capable of growth only in a living cell.
The first successful liver transplant was not performed until 1967 cheap 20 mg levitra soft free shipping, when a one and a half year old girl with hepatocellular carcinoma was transplanted buy cheap levitra soft 20mg on-line. One-year-survival in the early years was 25 to 35%, using methylprednisilone and azathioprine as immunosuppression. With the dramatic improvement in results, liver transplantation became recognized as the definitive management for end stages of acute and chronic liver diseases. The number of liver transplant centres in North America has proliferated to more than 100, and more than 6,000 liver transplants are performed yearly in the United States alone. The rate-limiting step in the application of transplantation to persons with liver disease has become donor availability. The most common indications for liver transplantation in adults and children are shown in Table 1. End-stage liver disease due to hepatitis C remains the most common indication in adults, comprising around 40% of patients on the waiting list. Most programs perform fewer than 5% of their transplants for persons with fulminant liver failure. In 10-30% of patients, recurrent hepatitis C after liver transplantation runs an aggressive course, leading to graft cirrhosis, with associated morbidity and mortality in 5 years. In most liver transplantation programs, a 6 months supervised abstinence period in the community, (i. The liver function of a sizable proportion of patients with end-stage alcoholic liver disease will recover during this minimum 6- month time period, thereby eliminating the need for transplantation. In addition, most centers will require some form of addiction counseling, including documentation that the patient understands and accepts that alcohol was the problem leading to his/her liver disease, and a stable psychosocial situation with an intact support network. Many of these patients have an increased perioperative and long-term cardiovascular risk that needs to be thoroughly addressed prior to listing. Thus, patient and graft survival rates are today similar to those for other transplant indications. Most programs still require that patients have low levels of viral replication (either occurring spontaneously, or induced by antiviral therapy) prior to transplantation, in order to reduce the risk of recurrence, and thereby to improve outcome. In Toronto for example, 30-40% of patients transplanted in recent years had hepatomas. The best results (around 80% disease-free 5- year survival) have been described in patients fulfilling the so-called Milan criteria, i. Physicians should be aware of their transplant centres policy when considering patients for referral. The exclusion of patients with contraindications to liver transplantation (Table 2) allows the best use of scarce donor resources, while maximizing patient benefit. Given the scarcity of donor organs, selection of the patient and the timing of the transplantation require individual assessment. The patient with decompensated cirrhosis should not be moribund, since this increases the risk of transplantation to an unacceptable degree. On the other hand of course, the liver patient should not be in such a stable condition that she/he might be able to live an independent life in the absence of liver transplantation. To allow for the time required for evaluation and decision making, the treating physician should consider patient referral for liver transplantation when a patient with cirrhosis (and without obvious contraindications, Table 2) decompensates. Preoperative Workup The principles behind the liver transplant workup are 1) to definitively establish the etiology of the liver disease; 2) to ensure that the patients liver disease is a sufficient indication for the procedure; and 3) to identify contraindications, i. Given the scarcity of donor organs, a 50% 5-year survival is generally accepted as the threshold below which liver transplantation is regarded as futile. Due to the scarcity of donor organs in most centers, poor quality of life per se, even if clearly related to the patients liver disease, is not a sufficient indication for transplantation. While the survival benefit of liver transplantation increases with increasing severity of liver disease (i. Catastrophic complications and the need for life support may impair post-transplant outcomes to such an extent that liver transplantation has to be regarded as futile and should no longer be performed. Note that there are no uniformly accepted objective criteria to indicate this is the case; the decision to take a potential liver transplant recipient temporarily or permanently off the waiting list for being too sick therefore requires a team decision after thorough multidisciplinary assessment. Urgency means that the potential recipient with the highest mortality on the waiting list should first receive a liver for transplantation. In many programs/jurisdictions in Canada, livers are currently still allocated to potential liver recipients based on medical status (and within a given status, waiting time). Patients with fulminant liver failure receive a status 3F or 4F, and have a higher priority than other status 3 and 4 patients, respectively. In addition, waiting time used to break status ties, does not correlate with medical urgency.
Non-adherence can threaten patients health individually as well as add vast costs to the health care systeman estimated $290 billion annually generic 20mg levitra soft with amex. This population represents 30 percent of all adults purchase levitra soft 20mg fast delivery, with a 1 Thinking Outside The Pillbox: A System-wide Approach to Improving Patient Adherence for Chronic Disease. The National Report Card on Adherence is based on an average of answers to questions on nine non-adherent behaviors. National Medication Adherence Report Card Average Grade: C+ A B 24% 24% F 15% C 20% D 16% 3 The score can range from 0 (non-adherence on all nine behaviors) to 100 (perfect adherence). Grouping adherence levels [see chart on previous page], just 24 percent earn an A grade for being completely adherent. An additional 24 percent are largely adherent, reporting one non-adherent behavior out of nine (a grade of B). Twenty percent earn a grade of C and 16 percent a D for being somewhat non-adherent, with two or three such behaviors in the past year, respectively. The remaining 15 percentone in seven adults with chronic conditionsare largely non-adherent, with four or more such behaviors, an F grade. Survey results on a subject such as medication adherence can be influenced by potential reluctance among some respondents to admit to undesirable behaviors. Thus the grades in this survey, if anything, may understate non- adherenceunderscoring cause for concern about the extent to which patients are following their medication instructions. Regression modeling, a statistical technique that assesses the independent strength of the relationship between two variables while holding other factors constant, identified the six key predictors of medication adherence. The survey also found demographic as well as attitudinal and informational differences in adherence: older Americans indicate greater adherence than younger respondents, for example, and those with lung problems report lower adherence than those without this chronic condition. When non-adherent respondents are asked their reasons for failing to comply with doctors orders, the most commonly mentioned reason is simply forgetting, cited by more than four in 10 as being a major reason. Other top reasons include running out of medication, being away from home, trying to save money and experiencing side effects. These, as well as further details about the drivers of medication adherence, are outlined in the full report. The full report, including its appendices on methodology, statistical analyses and the full questionnaire and topline results, is available for download at www. Millions of adults age 40 and older with chronic conditions are departing from doctors instructions in taking their medications skipping, missing or forgetting whether theyve taken doses, failing to fll or refll prescriptions, under- or over-dosing or taking medication prescribed for a different condition or to a different person. An overall C+ grade underscores the problem; the F grades earned by one in seven of these medication usersthe equivalent of more than 10 million adultsshould heighten alarm. This survey not only establishes the breadth of the problem but evaluates factors that infuence medication non-adherence, suggesting paths to attempt to address the problem. Pharmacists have a role at the forefront of addressing prescription medication non- Pharmacists have a role at the forefront of addressing prescription medication non-adherence. The results of this survey indicate that much depends on the extent to which pharmacists and pharmacy staff establish a personal connection with their patients and caregivers and engage with them to encourage fuller understanding of the importance of taking medications as prescribed. Independent pharmacists may be particularly well-placed to boost adherence, given their greater personal connection with patients. Health care providers have a vital role to play in stressing the importance of taking medications as prescribed, in monitoring and helping patients avoid or reduce unpleasant side effects that may compromise adherence and in helping to keep patients more generally well-informed about their health conditions. Health care providers, including pharmacists, can help reduce non-adherence by assisting economically vulnerable patients in finding the most affordable medication options. Better information, communication and patient/ caregiver support have been shown in previous studies to increase patients engagement and involvement in their health care, their satisfaction with their care and their loyalty to their health care providers. This survey shows yet another potential positive benefit of increased patient engagementa reduction in the currently high levels of prescription medication non-adherence in the United States, and its associated costs and health risks alike. Results: These areas are as follows: 1 vidual health by delivering the right dose of the right drug to the right research prioritization and early value assessment, 2 best practices for patient at the right time but create challenges in deciding which clinical evidence development, 3 best practices for health economic technologies offer sufcient value to justify widespread diffusion. Although this article * Address correspondence to: Eric Faulkner, Global Market Access, Quintiles, 4820 Emperor Blvd. Potential benets have also been characterized to better to certain therapies than do others, but it is difcult to know include the following [1,710]: a priori which individuals will respond to a particular treatment. For payers, this uncertainty results in inefciencies in selecting Increased certainty about diagnosis and mechanism of disease treatment, managing cost, and optimizing patient outcomes. As with any emerging technology scenario, clarifying areas the societal consequences of test-and-treat strategies and system of uncertainty and moving toward standard regulatory and reim- integration challenges. Payers include a wide variety of governmen- perspective, it is often considered a reasonable investment to de- tal and private organizations that manage reimbursement and ac- termine whether a medicine with annual costs of $20,000 to cess to patient care. They vary in size, scope, and the extent to $100,000 is likely to benet a particular individual. In a recent review of cost-effectiveness studies on agnostics and personalized medicine in late 2009. To what extent are cient communication between authorities evaluating tests and responders overidentied (false positives) or missed (false treatments, difculty tracking diagnostic utilization, and lack of negatives) by the test? In the case of clinical utility, for example, inconsis- inform treatment selection or ignore results? What potential tent denitions and availability of evidence and uncertainties re- harms are associated with the test?
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