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a chemical substance produced by microorganisms which has the capacity to inhibit the growth o bacteria. |
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any chemical substance used in medical practice. |
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a special group of chemotherapeutic agents used to treat diseases caused by microbes. |
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an antimicrobial agent's ability to cause harm to microbes without significant harm to host. |
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the amount of an antibiotic that successfully eliminates a pathogenic organism over time. |
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the maximum tolerable dose per kilogram of body weight, divided by the minimum dose per kilogram of body weight. |
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Broad Spectrum Antibiotics |
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Definition
Penicillins, Tetracyclines, Ampicillin, Cephalosporins, Chloramphenicol, |
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Narrow Spectrum antibiotics |
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Definition
Nystatin, Polymyxins, Erythromycin, Streptomycin, |
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5 modes of antibiotic action on microbes |
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Definition
1. inhibition of cell wall synthesis 2. disruption of cell membrane function 3. inhibition of protein synthesis 4. inhibition of mucleic acid synthesis 5. action as antimetabolites |
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name of the structure found in Penicillin and Cephalosprorin that can interfere with the cross-links of peptidoglycan in cell wall. |
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a substance that affects the utilization of intermediate compounds within a metabolic pathway. |
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antibiotic agent that competitively inhibits an enzyme that acts on PABA, which is needed for folic acid synthesis. |
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an invasion of microbes that are not indigenous to the body system. |
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5 Mechanisms of antibiotic resistance |
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Definition
1. Alteration of Targets(ribsomes) 2. Alteration of Membrane permeability 3. Development of new enzymes 4. Alteration of an existing enzyme 5. Alteration of a Metabolic Path |
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Definition
resistance to two or more similar antimicrobial agents via a common mechanism. |
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Definition
a method of determining which antibiotic is effective at killing a specific microbe. |
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Definition
a testing method used to determine the minimal level of diluted antibiotic that is effective. |
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8 characteristics of an ideal antimicrobial agent |
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Definition
1. must be soluble in fluid 2. must have selective toxicity 3. toxicity must not be easily altered 4. must be non-allergenic 5. must be maintain stablility in tissues 6. resistance must not be easily aquired 7. must have long shelf life 8. must be reasonably priced |
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Inhibitors of Cell Wall Synthesis |
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Definition
Penicillins Cephalosporins Carbapenems |
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Disrupters of Cell Membrane Function |
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Definition
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Inhibitors of Protein Synthesis |
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Definition
Aminoglycosides Tetracyclines Chloramphenicols Macrolides (Erythromycin) Lincosamides |
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Inhibitors of Nucleic Acid Synthesis |
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Definition
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Definition
Sulfonamides Isoniazids Ethambutol Nitrofurans |
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Definition
Imidazoles Polyenes (Nystatin,Amphotericin B) Griseofulvin Tinactin Lamisil |
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Definition
Ribavirin (Influenza virus) Zidovudine (AIDS Treatment) Amantadine (Influenza A) Interferons |
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Definition
Quinine (cinchona tree) Chloroquine (malaria) Primaquine (malaria) Metronidazole |
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