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Veterinary Microbio

VETERINARY-Bacteriology Basics

What are the differences between Prokaryotes and Eukaryotes? Prokaryotes lack a true nucleus, have membrane organelles, + divide by binary fission. Eukaryotes have nucleus, nuclear membrane, chromosomes, divide by mitosis
Name the protists found in Eukaryotic classification Protozoa, fungi, most algae
Name the protists found in Prokayrotes All bacteria
What are the 2 principle forms of bacterial morphology? Cocci + Bacilli
Name the 4 types of cocci morphology Diplococci, streptococci, staphylococci, sarcinae
Name the 5 types of bacilli morphology Bacilli, coccobacilli, vibrio, spirilla, spirochete
What are the functions of a bacterial cell wall? Protects against damage, responsible for shape, cell division, antigenic differences
The cell wall contains antigens. True or False? True
Name 3 functions of antigens on the bacterial cell wall 1) Involved in host defence 2) Serological identification in lab 3) Site of action of some antibiotics
What is a major component of a bacterial cell wall? Peptidoglycan
List the characteristics of a gram + bacterial cell wall 1) Has 2 layers 2) Thick peptidoglycan layer 3) Has teichoic + lipoteichoic acids 4) Stains purple with crystal violet
List the characteristics of a gram - bacterial cell wall 1) 3 layers 2) Thin peptidoglycan layer 3) Has phospholipids, lipoproteins, lipopolysaccharides (endotoxin) 4) Dies red/pink with safranin red
List the 6 steps involved in a gram stain 1) Make bacterial smear 2) Fix cells to slide with heat 3) Stain with crystal violet 4) Fix stain with iodine 5) Decolorize with alcohol 6) Counter stain with safranin red
Created by: vincentsvet