Term
| List the five characteristics, of the organisms that cause microbial infections, that provide a profile which is used by the medical microbiologist for preliminary identification? |
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Definition
Size
Shape (rods or spheres)
Gram Staining Reaction of individual cells
Growth requirements
Colony morphology |
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Term
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Definition
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Term
| What are the three major groups that make up the "Pyogenic Cocci"? |
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Definition
Staphylococci
Streptococci
Neisseria |
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Term
| Which major group are Gram + cocci which form grape-like clusters? |
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Definition
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Term
| Why do the staphylococci form grape-like clusters? |
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Definition
| Their plane of cell division is random and they do not separate. |
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Term
| Which group of organisms form opaque colonies that have a glossy appearance, are yellow to white in color, and are usually facultatively anaerobic? |
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Definition
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Term
| Which bacteria divide in a single perpendicular plane and form short or long chains? |
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Definition
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Term
| Which group of microbes are Gram +, grow well on rich media, and are either aerotolerant or anaerobic? |
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Definition
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Term
| Which group of microbes are the most common Gram - cocci of medical importance? |
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Definition
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Term
| Where does Moraxella catarrhalis inhabit? What does this strain frequently cause? |
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Definition
Inhabits the mucosa.
Causative agent of a lower respiratory disease. |
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Term
| Strains of ___________ can cause typhoid fever and gastroenteritis and are among the most significant pathogens in non-purified drinking water? |
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Definition
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Term
| Salmonella are related to __________ which are normally found in the large intestine. |
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Definition
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Term
| Yeast appear Gram + or Gram - on staining? |
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Definition
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Term
| What distinguishes yeast? |
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Definition
| Large size and oval shape |
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Term
| Give one example of a yeast species that can reside without harming and inside the human body but can eventually cause disease in individuals with lower defenses or those individuals on some kind of antibiotic? What is the general name given to these yeast species? |
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Definition
Candida albicans
Opportunist pathogens |
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Term
List the two bacteria mentioned in the lab that are present in dental plaque.
How do the metabolic activities of these two bacteria contribute to the formation of dental caries? |
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Definition
Streptococcus mutans and Streptococcus gordonii.
Lactic acid production. |
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Term
| List some infections that Candida albicans cause. |
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Definition
Oral and vaginal "thrush"
Skin infections
Endocarditis
Oropharyngeal candidiasis |
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Term
| Bacillus anthracis is primarily a pathogen of _______ but is responsible for _________ affecting humans. Clostridium tetani causes ________________. |
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Definition
Livestock
Anthrax
Wound Infections |
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Term
| What color is usually an indicator of a gram negative bacteria? |
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Definition
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Term
| What color is usually an indicator of a gram positive bacteria? |
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Definition
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Term
| Which type of bacteria has a think peptidoglycan layer? (Gram + or gram -) |
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Definition
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