Microbiology and Immunology 🦠 Flashcards
The scientific study of microorganisms
Microbiology
Gram positive staining is what color?
Blue
Gram negative staining is what color?
Red or pink
What are bacteria original color ?
Colorless they have no color (naked to the human eye)
What is the most useful technique in determining bacteria?
Gram staining technique
Characteristics of gram positive bacteria
Thick
Two layered
No porin channels
No periplasmic space
No endotoxins
Susceptible to breakdown by penicillin and lysosomes
Characteristics of gram negative bacteria
Thin
Three layered
Porin channels
Periplasmic space
Endotoxin (outer membrane)
Not susceptible to breakdown of penicillin or lysosomes
All organisms are susceptible to the gram staining technique
True or false
False
Mycobacterium tuberculosis is covered with an unusual waxy coating on the cell surface primarily made of ______ which makes it impervious to gram staining
Mycolic acid
What technique is used to identify mycobacterium tuberculosis?
The acid-fast technique
Treponema pallidum bacteria causes what pathogen?
Syphilis
Borrelia Burgdoferi bacteria causes what type of pathogen?
Lyme disease
Spirochetes require what technique to be identified?
Dark field microscopy
What bacteria is associated with the oral disease NUG and NUP?
Treponema denticola, fusobacterium, p. Gingivalis, and p. Intermedia
Spherical shaped organisms are which bacteria?
Coccus or cocci
Rod-like shaped organisms are which bacteria?
Bacillus or bacilli (also referred to as rods)
Lacking distinct shape is called
Pleiomorphic
Spiral-shaped organisms are which bacteria?
Spirochetes
This type of bacteria require oxygen to survive are:
Aerobes
The type of bacteria that DO NOT require oxygen to survive are:
Anerobes
Where do gram negative bacteria live?
Deep within your gingival crevicular fluid (below the gum line)
Give me two obligate anerobes bacteria
Provotella intermedia and porphyromonas gingivalis
Give me three obligate aerobe bacteria
Neisseria, pseudomonas, mycobacterium
P. Intermedia and P. Gingivalis are both gram _____ so they live _____ the gum line and
Negative, below
The most commonly used source of energy and carbon for BOTH humans AND bacteria is
Glucose
P. Gingivalis produced ________ which is an enzyme capable of breaking down collagen in connective tissue and PDL fibers
Collagenase
P. Intermedia are involved in all types of hormonal gingivitis like pregnancy, puberty, etc
True or false
True
P. Intermedia causes _______ in gingivitis
Cellulitis (inflammation of the cells)
Neisseria causes what pathogen?
Gonnerhea
Neisseria is a gram negative cocci
True or false
True
Pseudomonas is a gram positive rod
True or false
True
What are facultative anaerobes?
They are bacteria that can survive with oxygen and without oxygen
Facultative anaerobes can grow in the absence of oxygen by using
Fermentation
_____ is a chemical processing way of extracting energy from carbohydrates in the absence of oxygen (anaerobe)
Fermentation
What are the MOST disease causing organisms ?
Facultative anaerobes
Give me three facultative anaerobes
Staplococcus, listeria, actinomyces
Listeria are gram ________
Positive rods
Coccus are present in _______ development in plaque formation
Early
Calcification according to the shape
Morphology
Obligate aerobes produce these enzymes in order to protect themselves from the environment
Catalase, peroxidase, and superoxide dismutase
This cycle is a series of chemical reactions that take place in the mitochondria and is used to release stored energy derived from glucose, fats and proteins
Krebs cycle
The metabolic process that breaks down glucose and produces ATP
Glycolysis
A molecule that carries energy within cells acting as a rechargeable battery for our body functions
ATP
What is is called when you can tolerant low amounts of oxygen?
Microaerophilic
Give me two bacteria’s that are microaerophilic
Streptococcus and spirochetes
Oral anerobes can live in a periodontal pocket but not in the sulcus
True or false
False they can live in the sulcus as well
Streptococcus bacteria are gram _______
Positive cocci
Cornebacterium bacteria are gram _____
Positive rods
Staphylococcus bacteria are gram _______
Positive cocci
Bacillus are gram _______
Positive rods
Clostridium are gram ____
Positive rods
Which bacteria causes tetanus “lockjaw”
Clostridium
Treponema pallidum are gram _____
Negative spiral
Borrelia Butgofonferi are gram ______
Negative spiral
Treponema denticola are gram _____
Negative spiral
Which bacteria is related to botulism ?
Clostridium
Pseudomembranous colitis is a swelling or inflammation of the colon due to an over growth of this bacteria
Clostridium or C. Difficile
Clindamycin has stop being recommended for pre meds prior to dental treatments because it has been known to cause an increase of what disease
Psuedomembranous colitis
Cornebacterium causes a condition called
Diphtheria
Bacterial infection that can cause damage to your heart, Kidneys, and nervous system
Listeria is located in contaminated foods and can lead to what two conditions
Meningitis and sepsis
_______ is the infection of meninges which is the protective tissues of the brain and spinal cord causing stiff neck, headaches, and fever
Meningitis
______ is a serious condition that happens when the body’s immune system has an extreme response to an infection
Sepsis
Non-mobile, microaerophile, gram positive cocci
Streptococcus bacteria
All streptococcal organisms are catalase positive
True or false
False
They are catalase negative meaning they do not contain catalase BUT they do contain superoxide dismutase and hyaluronidase
What two enzymes break down hydrogen peroxide
Catalase and peroxidase
What enzyme breaks down free radicals or superoxide radicals
Superoxide dismutase
“The spreading factor” that allows bacteria to breakdown the matrix of plaque and tissues
Hyaluronidase
Streptococcus bacteria are grouped together according to their ability to hemolyze _____
RBC’s
____ has the complete ability to breakdown RDC’s
Beta- hemolytic streptococcus
Which streptococcal group completely break down RBCs
Beta- hemolytic streptococcus
Which streptococcal group is unable to lose RBCs
Gamma hemolytic streptococcus
_____ can partially lyse or breakdown RBCs
Alpha-hemolytic streptococcus
Latin for green
Viridis “viridans”
Most of the viridans group are_________ hemolytic streptococcus
Alpha
Viridans or normal inhabitants of the __________ and _________
Nasopharynx and gingival crevices