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Antibiotic

Definition

noun, plural: antibiotics

Antimicrobial agent made from microorganisms, and can kill and inhibit the growth of microorganisms, especially those that are infectious or disease-causing


adjective

Of, relating to, or pertaining to antibiotic


Supplement

Antibiotics are chemotherapeutic substances that are capable of killing and inhibiting growth of specific microorganisms, such as infectious bacteria and fungi.

There are different kinds of antibioics, and are classified based on their mechanism of action (i.e. if on the cell membrane, cell wall, or metabolism), chemical structure, spectrum of activity (i.e. if targeting gram-negative or gram-positive bacteria), or by mode of administration (e.g. oral, intravenous, or topical).

Antibiotic treatments should be done in accord to the recommended dosage and duration in order to prevent antibiotic resistance. The latter is a condition in which the antibiotic has become less effective when the target bacteria acquire resistance to antibiotic effects.

Antibiotics are derived from microorganisms, such as fungi and bacteria. Therefore, the antimicrobial gastric juice is not considered an antibiotic.


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staphylococcus aureus and biofilm formation

Bacteria resistant to antibiotic means it produce some enzyme ( eg. Beta lactamase) or other mechanism against antibiotic. I think normal microflora of gut form biofilm. Biofilm formation isn't a sole factor to confer antibiotic resistance.

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by josem
Fri Aug 01, 2014 7:53 pm
 
Forum: Microbiology
Topic: staphylococcus aureus and biofilm formation
Replies: 3
Views: 2987

Re:

... "SEMI SOLID (Sloppy) Agar – Anaerobic" - This media is usually used to test motility. "ANTIBIOTIC SENSITIVITY- Resistant." - To what??? "HUGH AND LEIFSON’S O/F TEST: Negative" - It cannot be negative. It's either Oxidative, ...

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by microbiologyhelp
Sun Dec 01, 2013 11:36 am
 
Forum: Microbiology
Topic: URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!
Replies: 6
Views: 5642

URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!

... "SEMI SOLID (Sloppy) Agar – Anaerobic" - This media is usually used to test motility. "ANTIBIOTIC SENSITIVITY- Resistant." - To what??? "HUGH AND LEIFSON’S O/F TEST: Negative" - It cannot be negative. It's either Oxidative, ...

See entire post
by Cat
Fri Nov 29, 2013 5:17 pm
 
Forum: Microbiology
Topic: URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!
Replies: 6
Views: 5642

URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!

... THIOGLYCOLLATE MEDIUM- Anaerobic SEMI SOLID (Sloppy) Agar – Anaerobic BLOOD AGAR PLATE: B-Haemolysis HUGH AND LEIFSON’S O/F TEST: Negative ANTIBIOTIC SENSITIVITY- Resistant. CATALASE- NEGATIVE OXIDASE- POSITIVE FERMENTATION: OF GLUCOSE – NEGATIVE, MANNITOL – NEGATIVE, DULCITOL – NEGATIVE ...

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by microbiologyhelp
Wed Nov 20, 2013 6:09 pm
 
Forum: Microbiology
Topic: URGENT HELP IDENTIFYING UNKNOWN BACTERIA!!!
Replies: 6
Views: 5642

G.I. Problems from Antibiotic Use

http://www.medscape.com/viewarticle/505473_7 The major mechanisms of antibiotic-associated diarrhea (AAD) involve disturbances of the gut microflora and the direct effects of antibiotics on the mucous membranes. The rates of diarrhea associated with parenterally ...

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by boron
Wed Nov 13, 2013 8:05 pm
 
Forum: Human Biology
Topic: G.I. Problems from Antibiotic Use
Replies: 11
Views: 4099
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