resistance

(redirected from bacterial resistance)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial.
Related to bacterial resistance: Antibiotic resistance

resistance,

in biology: see immunityimmunity,
ability of an organism to resist disease by identifying and destroying foreign substances or organisms. Although all animals have some immune capabilities, little is known about nonmammalian immunity.
..... Click the link for more information.
.

resistance,

property of an electric conductor by which it opposes a flow of electricity and dissipates electrical energy away from the circuit, usually as heat. Optimum resistance is provided by a conductor that is long, small in cross section, and of a material that conducts poorly. Resistance is basically the same for alternating and direct current circuits (see impedanceimpedance,
in electricity, measure in ohms of the degree to which an electric circuit resists the flow of electric current when a voltage is impressed across its terminals.
..... Click the link for more information.
). However, an alternating current of high frequency tends to travel near the surface of a conductor. Since such a current uses less of the available cross section of the conductor than a direct current, it meets with more resistance than a direct current. In circuit analysis an ideal resistorresistor,
two-terminal electric circuit component that offers opposition to an electric current. Resistors are normally designed and operated so that, with varying levels of current, variations of their resistance values are negligible (see resistance).
..... Click the link for more information.
, i.e., a circuit component whose only property is resistance, is called a resistance. The phenomenon of resistance arises from the interactions of electrons with ions in the conductor. The unit of resistance is the ohmohm
[for G. S. Ohm], symbol Ω, unit of electrical resistance, defined as the resistance in a circuit in which a potential difference of one volt creates a current of one ampere; hence, 1 ohm equals 1 volt/ampere. The megohm (1,000,000 ohms) and the milliohm (.
..... Click the link for more information.
. See superconductivitysuperconductivity,
abnormally high electrical conductivity of certain substances. The phenomenon was discovered in 1911 by Heike Kamerlingh Onnes, who found that the resistance of mercury dropped suddenly to zero at a temperature of about 4.
..... Click the link for more information.
; Ohm's lawOhm's law
[for G. S. Ohm], law stating that the electric current i flowing through a given resistance r is equal to the applied voltage v divided by the resistance, or i=v/r.
..... Click the link for more information.
; conductionconduction,
transfer of heat or electricity through a substance, resulting from a difference in temperature between different parts of the substance, in the case of heat, or from a difference in electric potential, in the case of electricity.
..... Click the link for more information.
.

resistance,

in psychiatry: see psychoanalysispsychoanalysis,
name given by Sigmund Freud to a system of interpretation and therapeutic treatment of psychological disorders. Psychoanalysis began after Freud studied (1885–86) with the French neurologist J. M.
..... Click the link for more information.
.

Resistance

The physical property of a material to resist or impede the conduction of electrical current, measured in ohms. High resistance means poor conductivity and vice versa.

resistance

[ri′zis·təns]
(acoustics)
(electricity)
The opposition that a device or material offers to the flow of direct current, equal to the voltage drop across the element divided by the current through the element. Also known as electrical resistance.
In an alternating-current circuit, the real part of the complex impedance.
(fluid mechanics)
(mechanics)
In damped harmonic motion, the ratio of the frictional resistive force to the speed. Also known as damping coefficient; damping constant; mechanical resistance.

electrical resistance

The physical property of a device, conductor, element, branch, or system, by virtue of which power is lost as heat when current flows through it; the physical property which an electric conductor exhibits to the flow of current; measured in ohms.

resistance

1. 
a. the opposition to a flow of electric current through a circuit component, medium, or substance. It is the magnitude of the real part of the impedance and is measured in ohms.
b. (as modifier): resistance coupling
2. any force that tends to retard or oppose motion
3. (in psychoanalytical theory) the tendency of a person to prevent the translation of repressed thoughts and ideas from the unconscious to the conscious and esp to resist the analyst's attempt to bring this about
4. Physics the magnitude of the real part of the acoustic or mechanical impedance
References in periodicals archive ?
Blood culture should be reserved for urosepsis with the presumable bacterial resistance. Some laboratory data should be repeated on the third consecutive day (total white blood cell (WBC) count, CRP/ESR/procalcitonin, urine sediment [+ or -] leukocyte/mm (3) count, urine culture, rarely blood culture after previous positive sample).
Bacterial Resistance Spread between Patients with Two Diseases
Bacterial resistance has become one of the most important issues in the global medical field.
When inappropriately prescribed, they lead to bacterial resistance, unnecessary side effects and increased medical expenses.
CEI notes that FDA already regulates animal antibiotic use stringently and mandates efforts to slow down the development of bacterial resistance. Many governments in Europe have banned the use of antibiotics for growth promotion purposes, but, CEI claims these efforts have had little or no effect on the development of resistant bacteria.
Among the drugs being taken more often, the researchers pointed out, are new broad-spectrum antibiotics that are more expensive and more likely to lead to bacterial resistance than older versions.
Side effects are minimized because of minimal systemic absorption of the medicated solutions prescribed for nasal irrigation, and topical treatment addresses the problem of bacterial resistance to oral antibiotics.
In areas without widespread bacterial resistance to TMP/SMZ, a 3-day course of TMP/SMZ could be considered first-line treatment for uncomplicated UTI in patients without allergies or contraindications.
Interestingly, 90% of the subjects were discharged on antibiotics; largely seen by non-dentists so perhaps this is not surprising, but the risk of allergy and increasing bacterial resistance should not be overlooked.
Tigecycline (Tigacil), approved by the Food and Drug Administration in 2005, is structurally similar to the tetracyclines, particularly minocycline (Minocin), but has been chemically modified to overcome the most common mechanisms of bacterial resistance to tetracyclines.
Also, bacterial resistance could be an issue with long-term therapy, but this was not addressed in the studies reviewed.

Full browser ?