Immunology Flashcards
What is the technical name for a T helper cell
CD4+ T cell
What is the technical name for a Cytotoxic T cell
CD8+ T cell
Which part of the lymph node are Macrophages and Dendritic cells found in?
Cortex and Paracortex
What do Macrophages and Dendritic cells do inside the lymph node?
Entrap antigens
Where are T cells found within the lymph node
Paracortex
Where are B cell found within the lymph node
In the cortex within follicles and germinal centres
What are the 3 distinct micro-environments within the lymph node?
Cortex, Paracortex, Medulla
What do fungi cell walls contain that other organisms don’t?
Chitin
What is the name for a eukaryotic worm parasite?
Helminth
What is a unicellular motile eukaryotes called?
Protozoa
Define a pathogen
An organism capable of causing disease
What is a commensal?
An organism that colonies a host but doesn’t cause disease
What is an opportunistic pathogen?
A microbe that only causes disease in vulnerable hosts
Define virulence
The degree to which an organism is pathogenic
What is asymptomatic carriage?
Where a pathogen is carried harmlessly in a tissue site and causes no disease.
what does coccus mean?
Small and round bacteria
What does Bacillus mean?
Long rod shaped bacteria
What colour is a positive gram stain?
Blue
What colour is a negative gram stain?
Red
What is a vibrio
A curved rod gram negative bacteria
What is a spirochaete?
A spiral rod gram negative bacteria
What are the gram positive types of bacteria?
Any cocci bacteria or a chain of rods
What does a Ziehl-Neelsen stain show?
Whether a bacteria is acid resistant
Give 2 examples of gram positive cocci
Staphylococci and streptococci
Give 2 examples of gram negative cocci
Neisseria meningitidis and Neisseria Gonorrhoea
Give 2 examples of gram positive bacillus
Clostridium tetani, listeria
Give 2 examples of gram negative bacillus
E.Coli and Salmonella
