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CCBC Microbiology 230-Summer 2011-Lecture Exam #1 Study Guide
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CCBC Microbiology 230-Summer2011-Lecture Exam #1 Study
Guide
The study of bacteria is called what? - Answer Bacteriology.
The study of viruses is called what? - Answer Virology.
The study of fungi is called what? - Answer Mycology.
What are the general effects of endotoxins? - Answer 1. Stimulates inflammation. 2.
Causes excessive inflammation which is dangerous to humans 3. Causes damage to
animal cell membranes causing leaking of cell fluid (necrosis)
The genus mycoplasma is considered a atypical bacteria. Why? - Answer This genus of
bacteria is smaller then most bacteria, it does not have a peptidogylcan wall, lacks a
ridged shape and is refereed to as being pleomorphic (many shaped)
What is a nosocomial infection? - Answer An infection acquired in the hospital.
How do you treat mycoplasma infections? - Answer Tetracycline.
How big are bacteria in the Rickettsia genus? - Answer approx .03-.05 um.
What are Rickettsia bacteria composed of? - Answer They have small levels of
peptidogylcan and a coccobacillary shape (egg shape looking)
How do Rickettsia bacteria survive? - Answer They are obligate intracellular parasites
that must live inside a living cell. These bacteria will not grow outside of a cell, so it
cannot be studied on a agar plate.
What are the symptoms for people who have contracted a Rickettisa bacteria? - Answer
7-14 days the patient will develop a high fever Delirium, Red Spotted Rash. Can last for
weeks. Can cause damage to the blood vessels, the heart, the kidneys and the brain.
What are the four important infections caused by the genus of bacteria called
Chlamydia? - Answer 1) Psittocosis (infection of birds)
2) Trachoma (Conjunctivitis-infection of the eye.)
3) Lymphogranulomavenereum (LGV) --sexually transmitted disease.
4)Genitourinary chlamydia infection: This is a sexually transmitted disease,
, Do Fungi have peptidogylcan in their cell walls? - Answer NO.
How do Yeasts procreate? - Answer They procreate by a process called budding.
What are the four important yeasts to a microbiologist? - Answer 1) Sacchoarmyces
(suger lovers for brewing)
2) Candida
3) Cryptococcus neoformans:
4) Pneumocystis jiraveci
What is the most common pathogenic yeast? - Answer Candida, Candida albicans is
almost always the cause for yeast infections in humans.
What is the study of Fungi called? - Answer Mycology.
What are the characteristics of Fungi? - Answer 1. are eukaryotic;
2. have a rigid cell wall;
3. are chemoheterotrophs (organisms that require organic compounds for both carbon
and energy sources);
4. obtain their nutrients by absorption;
5. obtain nutrients as saprophytes, organisms that live off of decaying matter, or as
parasites, organisms that live off of living matter.
How big is a typical yeast? - Answer 1-5 um wide and between 5-30 um long.
Are yeasts facultative anaerobes? - Answer Yes.
What yeast that we have studied in class is said to be dimorphic? - Answer The yeast
Candida can grow like a yeast or it can grow like a mold.
How do yeasts reproduce? - Answer Asexually by a process called budding.
Is the yeast Candida albicans considered to be normal flora? - Answer Yes, it is found on
the mucous membranes in the gastrointestinal track but is usually held in check by
normal flora of the body and normal body defenses.
When a person becomes infected with Candida albicans what can we suspect about this
person? - Answer This individual is most likely immunosuppressed, possibly had
received prolong antibacterial therapy. If the patient is a women who is diabetic,
pregnant, going through menopause or taking oral contraceptives could become
infected with Candida albicans
The yeast Candida albicans manifests itself as what in humans? - Answer The most
common are thrush and vaginitis.
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