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Microbio #3
Antibiotics
11
Microbiology
12th Grade
11/12/2011

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Term
Antibiotic
Definition
An antibiotic is a chemotheraputic agent that kills or harms pathogenic bacteria but does not cause too much harm to the host.
Term
Antibiotcis in history
Definition
Treatments for infection in ancient Chinese medicine using plants
with antimicrobial properties were described over 2,500 years
ago
Egyptians and ancient Greeks used molds and plants
to treat infections.
Term
Descovery of antibiotics
Definition
The first antibiotic was penicillin,Alexander Fleming descovered is by accident from a mold culture. Today over 100 different antibiotics are avalible to doctors to cure minor discomforts as well as life thretening infections.
Term
How can the antibiotic know what to attack?
Definition
Human cells do not chemically resemble bacteria
cells, this is the reason why the antibiotic can differentiate between the good guys
and the bad guys.
Term
what are bacteriostatic antibiotics?
Definition
baceriostatic antibiotics inhibit groth and reproduction of bacteria without killing them. Bacterioststic antibiotics have to work with the immune system to remove the pathogenic microoganisms from the host. Bacteriostatic antibiotics limit the groth of bacteria by interfering with pacterial protein production or by interfering woith the bacterial microorganism.
Term
What are bactericidal antibiotics?
Definition
The bacterial antibiotics directly kill the pathogenic bacteria. It inhibits cell wall synthesis. The beta-lactam antibiotics are are bactericidal.
Term
Beta-lactam antibiotics do not always have a Beta-lactam ring in their structure
TRUE or False
Definition
False
All beta-lactam antibiotics
Term
Locate the beta-lactam ring in the structute of penicillin!
Definition
it is the square with the O and the N included
Term
what are the dangours of antibiotic resistance
Definition
1- Infections caused by resistant microorganisms often fail to respond to the standard treatment, resulting in prolonged illness and greater risk of death.
2- When infections become resistant to first-line medicines, more expensive therapies must be used. The longer duration of illness and treatment, often in hospitals, increases health-care costs and the financial burden to families and societies.
3- The achievements of modern medicine are put at risk by antibiotic resistant microorganisms. Without effective antbiotics for care and prevention of infections, the success of treatments such as organ transplantation, cancer chemotherapy and major surgery would be compromised.
4- The growth of global trade and travel allows resistant microorganisms to be spread rapidly to distant countries and continents
Term
What are probiotics?
Definition
Probiotics are live microorganisms thought to be beneficial to the host organism. According to the currently adopted definition by FAO/WHO, probiotics are: "Live microorganisms which when administered in adequate amounts confer a health benefit on the host".[1] Lactic acid bacteria (LAB) and bifidobacteria are the most common types of microbes used as probiotics; but certain yeasts and bacilli may also be helpful. Probiotics are commonly consumed as part of fermented foods with specially added active live cultures; such as in yogurt, soy yogurt, or as dietary supplements.
Term
what do you know about antibiotic resistant tuberculosis
Definition
About 440 000 new cases of multidrug-resistant tuberculosis emerge annually, causing at least 150 000 deaths. Extensively drug-resistant tuberculosis has been reported in 64 countries to date.
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