Lecture 7 - Defining Disease Flashcards
(21 cards)
What are infectious agents that can cause disease in humans?
Prions Viruses Bacteria Fungi Protoctista and Parasitic invertebrates
What causes Influenza?
A Virus
What causes Ringworm?
Fungus
What causes Malaria?
Protozoan
What causes tuberculosis?
Bacteria?
What causes CFD?
Prion
What causes Pin Worms?
Parastic worm
What is a disease?
A condition with a specific curse in which part of all of an organism is made to function in an abnormal or less efficient manner
What is a symptom?
Indications of a disease noticed by the patient
What is a sign?
Indications of a disease that are picked by the doctor but not necessarily the patient
What are the Clinical Signs and Symptoms of Stomach Ulcer?
Symptoms:
Tired, pale, out of breath, stomach pain
Clinical Signs: H. Plyori in stool or blood sample
What is Kochs Postulate?
Suspected pathogen must always be present when the disease is present and absent when it’s not
What does Aetiology mean?
The cause of a disease and factors underlying the spread of the disease
What does Epidemiology mean?
The study and analysis of the pattern, causes and effects of health and disease conditions in defined populations.
What is an Epidemic?
A widespread occurrence of an infectious disease in a community at a particular time
What is a pandemic?
An epidemic of infetious disease that has spread through human population across a large region; for instance multiple continents or even worldwide
What is a host?
A host is a living cell in which a virus reproduces
What is a primary host
Primary Host = Parasite reaches maturity and if possible reproduces
What is a Reservoir host?
Can harbour a pathogen indefinitely with no ill effects
What is a vector?
Any living organism that transmits an infectious agent from one host to another e.g. Lyme disease from deer mice to ticks in humans
What is a carrier?
Asymptomatic carrier, a person or organism is infected with an infectious disease agent, but displays no symptoms
