Anti-infectives Part 1 Flashcards
Father of Antiseptic surgery
Used carbolic acid also known as phenol to wash his hands and to spray on incision sites
Joseph Lister
19th Century
Antibacterial dyes and antiparasitic organic arsenicals
Selective toxicity
Discovered compound 606
Paul Ehrlich
The antisyphilitic drug
Salvarsan
Compound 606
Used for sleeping sickness
Sodium arsanilate, arsphenamine
Atoxyl
Causative agent for sleeping sickness and what insect
Tripanosomabrocae
Tse-tse fly
Anti-infective used locally
Germicides
Used in living tissue preventing infection
Antisepsis
Destruction or marked reduction in the number of activity of microorganisms
Decontamination
Destroys most vegetative microbes or viruses but not spores. Inanimate surfactes
Disinfections
Reduction of microbial load, inanimate objects,
Acceptable for public health purposes
Sanitation
Kill or remove all types of microorganisms
Low probability of survival
Sterilization
Kills non-sporulating microorganisms by hot water or steam at 65 to 100 degrees celsius
Pasteurization
Living tissues
Bactericidal/bacteriostatic
Antiseptics
Applied to inanimate objects
Disinfectant
8 carbon alcohol
Octanol
Moa of alcohol
Protein precipitation
Higher vander waals forces
Higher penetration to membrane
More potent alcohol
N-propyl alcohol
Cheaper
More commericially used alcohol
Iso-propyl alcohol
Methanol
Carbinol
Wood alcohol
Methyl alcohol
Toxic metabolites of methanol
Formaldehyde
Formic acid
Effect of formic acid
Metabolic acidosis
And tissue injury
Ethanol, rectified spirit, wine spirit,spiritus vini rectificatus
Ethyl alcohol
Method of prepartion of ethyl alcohol
Fermentation- sugar and yeast
Synthetically- H2SO4 catalyzed hydration of ethylene
Commercial ethanol conc
95%
Acetaldehyde produces hangover like the Drug____ that treats alcholism
Disulfiram
Alcohol has additive unfit for use in intoxication bev
Denatured alcohol
With wood alcohol and benzene
Methanol+ benzene
Completely denatured alcohol
Ethylene and water
Ethyl
Astringent
Rubefacient
Mild local anesthetic
Rubbing alcohol
Isopropyl rubbing alcohol contains
68-72%
Prepared commercially by the H2SO4 hydration of propylene
Isopropyl alcohol
Uses of isopropyl alcohol
Disinfectant for the skin and surgical instruments
Bactericidal 50-95%
40% concentration is considered equal in antiseptic efficacy
Uses of Azeotropic isopropyl alcohol USP
In gauze pads
Sterilization of the skin before hypodermic injection
Absolute ethanol
99% w/w of ethyl alcohol
Dehydrated ethanol
Method of prep of Dehydrated ethanol
Azeotropic distillation of ethanol and benzene
Meaning of azeotropic
2 substances combined gets new boiling point
Not ideal for digestion may contain benzene
Solvent/reagent
Treatment of ganglia/neuralgia
Treatment of intractable chronic pain
Therapeutic neurolysis of nerves
Dehydrated Ethanol
Mixture of alcohol and water containing 41-42% by wt
Diluted alcohol
1,2,3-propanetriol
First polyhydric alcohol that can yield both an aldose and a ketose
Use- solvent and humectant
Glycerin/ Glycerol
Polyhydric alcohol meaning
More than 2 hydroxyl groups
Gas sterilant
For temp sensitive medical equipment
An explosive mixture in the air
3 to 80%
Ethylene oxide
10% ethylene oxide + 90% carbon dioxide
Ethylene oxide
Ethylene oxide released without danger
Carboxide
Moa of carboxide
Alkylation of functional groups in nucleic acids and proteins by nucleophilic opening of the oxide ring
Alkylation
Sharing of electrons
Between electrophiles and nucleophiles
Formol formalin methanal
Formaldehyde
Irritating to mucous membranes and causes hardening of the skin used to disinfect rooms clothing and surgical equipment
Formaldehyde
Contains not less than ___ of formaldehyde with methanol to prevent polymerization
37%
MOA of formaldehyde
Direct non specific alkylation of nucleophilic functional groups in proteins and nucleic acids to form carbinol derivatives
Glutarol (cidex) pentanedial
Disinfectant superior to formaldehyde
For sterilization of equipment that cant be autoclaved
Glutaraldehyde
Stabilized in alkaline solution
Consists of 2 components glutaraldehyde and a buffer
Activated soln contains 2% glutaraldehyde and buffer of 7.5 to 8 pH
Retains over 80% of the original act 30 days after prep
Glutaraldehyde
Protein precipitant
Also known as carbolic acid
Pheonol
Uses of phenol
Germicide-(protoplasmic poison)
Local anesthetic action but caustic
Used as surgical antiseptic- (Joseph Lister)
Phenol is mixed with
Used to cauterazize small wounds
4% glycerin
Phenol concentration in antipruritic in phenolated calamin
.1-1% concentration
Defined as the ratio of a disinfectant to the dilution of pheonol required to kill a given strain of bacterium salmonella typhi
Phenol coefficient
Characteristics of phenol
Precipitate bacterial proteins at low concentrations
Lysis of bacterial cell membrane at high concentrations
Soluble 1:15 in water
Forms eutetic mixture ex thymol and menthol
P-chlorophenol
P-chlorophenol + camphor in liquid petrolatum (used as external antiseptic and anti irritant
Phenol coefficient- 4
p-chloro-m-xylenol
PC-MX, Metasep (brand name)
Non irritating antiseptic with broad spectrum
Antifungal and antibacterial
2% in shampoo
Topical for tinea ringworm infections such as atheletes foot and jock itch
Hexachlorophene
Brand name- Phisohex, Gamophen, Surgicon
IUPAC- 2,2-methylenebis (3,4,6- trichlorophenol)
Uses- antiseptic low conc effective against gram+
2-3% in soaps detergents creams lotions and shampoos
Cresol
Obtained from coal tar or petrolatum by alkaline extraction into aqueous medium, acidification,and fractional distillation
Phenol coefficient of 2.5
Chlorocresol
4-chloro-3-methyl phenol
Preservative
Thymol
Isopropyl m-cresol
From oil of thyme
Has fungicidal properties used in alcoholic solutions or dusting powders
Tx of tinea infections
Resorcinol
m-dihydroxybenzene
Resorcin brand name
Weak antiseptic keratolytic
1-3% used in solutions and in ointments and pastes in concentrations of 10-25 for tx of skin conditions like ringworm eczema psoriasis nad seborrheic dermatitis
Hexyresorcinol, USP
4-Hexylresorcinol
Antiseptic and mild anesthetic ( as throat lozenges)
Bactericidal and fungicidal and surfactant
Eugenol
4-allyl 2-methoxyphenol
Uses loval anesthetic effect but used also as antiseptic in mouthwashes, dental analgesics
Phenol coefficient of 14.4
Has the ability to liberate oxygen in tissues
Example is H2O2
Oxidizing agents
Hydrogen peroxide
Agua oxegenada
Germicide very short acting prone to enzyme destructuon before it reaches in wounds
Carbamide peroxide
Gly-oxide
Stable complex of urea and Hydrogen peroxide
Commercial prep solution of 12.6 % in glycerin
Addition of water to liberation of hydrogen peroxide
Antiseptic
Disinfectant