mm pp 1 Flashcards
Medical Microbiology
The study of microorganisms that cause human disease
Antoni Van LeeuwenHoek (1632-1723)
Made the first simple microscope to view “animalcules” (microorganisms)
Koch and Pasteur
Credited with developing the Germ theory
Carolus Linnaeus
Developed system for naming and classifying plants, animals, and similar organisms together (Taxonomic systems)
Otto Muller
Grouped Leeuwenhoeks organisms into five categories: fungi, protozoa, alge, prokaryotes, small animals
Friedrich Henle(1840)
First proposed the germ theory
Louis Pasteur
Father of Microbiology
Robert Koch
Father of Microbiology Lab
John Snow (1854)
Studied Cholera
Koch’s Postulates
- Agent must be isolated and grown outside the host, 2. Suspected causative agent must be found in every case of the disease and be absent from healthy host, 3. When agent is introduced in healthy host, the host must get the disease, 4. Same agent must be re-isolated from diseased experimental host
Helicobacter Pylori
Gram Negative Bacteria that is thought to play a part in Ulcers and stomach lesions
Chemotherapy
Using chemicals to treat microbial infections
Paul Ehrlich (1910)
treated syphilis with arsenic compound
Alexander Fleming (1928)
Left out plates that caused penicillium chrysogenum to kill staph on a bacterial plate-helped with development of antibiotic (also discovered lysozyme)
Chain and Heatly in Florey’ lab (1940’s)
Developed a stable form for therapy with penecillin. Allies used it, Germans did not.
Gerhard Domagk (1935)
Sulfanilamide
Selman Waksman (1943)
Streptomycin
All currently used antivirals are _______
Synthetic
Anti-Microbial
General use-Kills microbes
Anti-Fungal
Kill Fungus
Anti-Parasitic
Kill Parasites
Microorganisms in Medical Microbiology
viruses, prokaryotes, fungi, parasites, prions
Prion examples
CJD, Bovine Spongioform Encephalopothy
Smallest Complex Pathogen with DNA or RNA genome (Also has a protein capsid and some have envelopes)
Virus
Size range of viruses
18-600 nm
How many different types of viruses are there?
3000+ viruses
How many different viruses infect humans and animals?
650+ viruses infect humans and animals
Viral Envelope is made of?
Lipids
Ivanovsky
TMV research
Reed
Yellow Fever Research
Rous
Rous Sarcoma Virus Research
Rabies Virus Shape
Bullet shape
Bacteria
Unicellular- Potentially Pathogenic prokaryotic organisms that reproduce asexually
Size of Bacteria
1-20 micrometer or larger
Two primary types of Bacteria
Gram positive and Gram Negative
Number of bacterial species on or in the human body
1000’s
3 basic shapes of bacterial species
Rods, Cocci, and spirals
Number of names bacterial species
6250 named species
Human Microbiome Project
Research project meant to study and identify the different types of microbes that take residence in the human body
Gram Negative Stain Color
Pink
Gram Positive Stain Color
Purple
Fungi
Eukaryotic Yeasts or Molds-Opportunistic
Yeasts
Unicellular fungi with asexual reproduction
Mold
Filamentous with Asexual or sexual reproduction
Dimorphic fungi
Can assume both yeast and mold form depending on situation
Medical Mycology
Study of Fungi medically
Saprobes
Feed on dead organic material
Aspergillus
Common Mold
Penicillium
Filamentous Fungus that has spores and hypha
Parasites
Eukaryotic Complex Microbes with extremely complex life cycles
Unicellular Protozoa size
1-2 micrometers
Multicellular Helminths Types
Worms, flatworms, and roundworms
Size of multicellular Helminths
1 micrometer to 10 meters
Nematodes are also called __________
Roundworms
Paramecium
Non-pathogenic Protozoa
Giardia
Unicellular Protozoa that can cause gastroenteritis
Trypanosoma brucei
Nematode that can cause sleeping sickness
Arthropods Examples
Ticks, Mosquitos, fleas
Kissing Bug
Arthropod that Causes Chagas Disease and sucks blood from host
naegleria fowleri
Amoeba-Have pseudopods (Cause deadly infection that eats away at brain)
Disease Carried by Ticks
Lime disease
Disease carried by Mosquito
Yellow Fever
Disease caused by Fleas
Plague
Vectors
Transmitted to host
Immunology
Study of the immune system
Bacteriology
Study of Bacteria and archaea
Phycology
Study of Algae
Mycology
Study of Fungi
Protozoology
Study of Protozoa
Parasitology
Study of parasitic protozoa
Virology
Study of Viruses
Environmental Microbiology
Relationships between microbes and among microbes, other organisms, and their environments
Serology
Study of Antibodies in blood serum,
Etiology
Study of Cause of disease
Why do we study Microbial Disease?
Study in order to understand and to control them within society
Strict Pathogen
Always Pathogenic
Opportunistic Pathogens
Cause disease under particular circumstances (usually already in the body)
Exogenous Infections
Due to exposure to organisms from an external source (Examples include Most viruses, C. tetani, N. gonorrheae)
Endogenous Infections
Due to organisms that are part of a persons microbial flora (Staph, strep, e. coli)
Macroscopic Morphology
Technique used to study and determine characteristics by the colonies on a plate of bacteria
Microscopic morphology
Look at plates under a microscope, including the use of stains, etc
Phage typing
Technique used to determine bacteria based on bacteriophage that infects the species
Antibiogram Patterns
Techniques used to determine bacteria based on the antibiotics that kill the bacterial colonies
16s rRNA analysis
Primary identification process used-Base sequence of RNA determined
Dichotomous Keys
Series of paired statements worded so that only one of two “either/or” choices apples to any particular situation
Genotypic Classification and Identification of Bacteria Techniques
GC/AT ratio, DNA Hybridization, Nucleic Acid sequence analysis, Plasmid analysis, Ribotyping, Chromosomal DNA fragment analysis using restriction enzymes
Analytical Classification of Bacteria
Cell wall fatty Acid analysis, Whole Cell lipid analysis, Whole Cell protein analysis, Multifocus locus enzyme electrophoresis, Glycosylation analysis
What is Rabbit Fever?
Another name for Tularemia. Vectors include ticks and mosquitos.
What is the germ theory?
Theory that diseases are caused by microorganisms that can only be viewed with microscopes or specialized lenses.