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Microbiology
4E031 Block 2
25
Medical
Undergraduate 1
06/28/2012

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Cards

Term
What is microbiology
Definition
Study of very small living organisms
Term
What are cells
Definition
Smallest & simplest unit of living matter capable of indiependent life aned self-reproduction
Term
What are two types of cells
Definition
Simple Cells - Have no nucleus or specialized organelles <br><br> Complex cells - Highly organized, have defined mucleus
Term
Define microorganisms
Definition
Simple Microorganisms are defined as either a bacteria or a virus <br> <br> Complex Microorganisms are defined as fung, protozoa or algae
Term
What is Bacteria?
Definition
It is a simple microorganism, Characterized by 3 major basic shapes: Round, Rod, and Spiral. Has staining characteristics
Term
What are Staining Characteristics
Definition
Used to highlight micro-organisms to determin shape, and arrangement: Gram Postitive - Thick cell wall/purple. Gram negative: Thin cell wall colorless or red
Term
Are gram + and Gram - killed by differnet antiboiotics?
Definition
Yes
Term
What are antibiotics
Definition
A substance produced by microorganisms that kill bacteria
Term
What are endospores
Definition
Resting structures made by some bacteria for survival under adverse conditions such as extreme heat, lack of water and exposure to toxic chemicals (can lie dormant for long time even hundreds of years)
Term
What are some examples of Bacteria?
Definition
Tuberculosis and Sextually Transmitted Infections
Term
What are viruses
Definition
Non-cellular entities that are parasites of cells (Derives nutrients from lifing host without benefit to host, cant reproduce by self, can t metabolize energy or proties , consist of DNA or RNA but not both.
Term
What are examples of Viral diseases
Definition
Infuenza, HIV, Hepatitis B
Term
Viruses multiply only in cells of what particular species?
Definition
Animals, Bacteria, and Plants
Term
What are Complex Microorganisms
Definition
- Fungi (Yeast, Molds), - Protozoa(Amoebic dysentery, Giardiasis, Malaria), Algae (Red Tide)
Term
What are Protozoa
Definition
Microscopic animals found in soil, water, and in the intestinal tract of animals (classified by their means of movement)
Term
What are examples of Protozoa
Definition
Flagellates, Ciliates, Pseudopdia, Some cant move by themselves to be carried
Term
Can Protozoa have more than one host?
Definition
Yes allowing you to catch some protozoa from other animals
Term
What are some medically important protozoa?
Definition
Amoebic dysentery, Giardiasis, Malaria
Term
What is algae
Definition
May be unicellular or multicellular, covert carbon dioxide to oxygen during photosynthesis, mostly aquatic or on trees if sufficient moisture availabe, prefer light. EXAMPLE: Red tides that produce toxin that paralyzes chell fish
Term
Describe microbial growth
Definition
Environmental requirements for growth can be divided into two categories: Physical and Chemical.
Term
What are physical requirements for microbial growth
Definition
Light energy source (photosynthesis), Temperature (3 groups based on preferred range of temps), PH (acidity - grow best in narrow range of pH neutrality between 6.5 and 7.5)
Term
What are chemical requirments for Microbial growth
Definition
Water: Hydrophilic (plenty of moisture for growth), Hydrophobic (best with little moisture). Carbon, Use carbon dioxide as source or us organic material as source of carbon, Oxygen: Aerobic, Anaerobic, Facultative and Obligate Anaerobes
Term
What are chemical requirments for Microbial growth in Water
Definition
Carbon: some micro organisms use carbon dioxide as their source of carbon.
Term
What are different types of elements of microbial growth regarding chemical requirements and oxygen
Definition
Aerobic - Needs oxygen to live, Anaerobic - live without oxygen, Facultative - Anaerobes that can survive with or without oxygen, obligate anaerobes- die if exposed to oxygen
Term
What methods used to control microbial growth
Definition
Microbial growth that ccan be controlled by physical methods, chemical agents or sterilization
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