Diseases Flashcards
Bacteria
single celled organisms without a nucleus
Viruses
Thread-like particles that produce by taking over living cells
Fungi
Simple organisms that grow as single cells or thread like filaments
Protozoa
single-celled organism with a nucleus
Disease
anything that causes your body to not function properly
Non-infectious disease
disease that cannot be transmitted from person to person since they are caused by other factors e.g. genetics, environment and lifestyle
infectious disease
disease that can be tranmsitted via a pathogen
Pathogen
disease causing organism
Types of pathogens
Bacteria, viruses, fungi, protozoa
Distinguish between an infectious disease and a non-infectious disease
Infectious diseases are transmitted between individuals by a pathogen for example influenza where the virus is spread through particles in the air (coughed, sneezed, breathed out) WHEREAS non-infectious diseases are not caused by pathogens, they are caused by other factors for example down syndrome that is caused by an additional chromosome.
types for non-infectious diseases
genetic disorders, diet related, environmental, circulatory system, cancers, drug abuse, mental illness
huntington’s disease
cause, symptoms, treatment, prevention/control
a single defective gene on chromosome 4, mutation of DNA segment known as a CAG trinucleotide repeat
involuntary jerking, muscle problems, slow eye movement, difficulty in speech or swallowing
No cure, drugs, physiotherapy and talk therapy
Genetic counselling before having children, cant prevent once inherited
Melanoma
cause, symptoms, treatment, prevention/control
Excessive exposure to ultraviolet radiation from sunlight or tanning lamps
Large brown spots, moles that change in colour, size, feel and bleeds, small lesions with irregular border and portions that appear red white pink blue
Skin grafting, surgical removal, excision of the primary melanoma on the skin
Wear UV protection, sunscreen
Direct transmission
The disease is spread by direct contact with an infected person
Indirect transmission
disease which occurs through an intermediary agent such as an insect, air or contaminated water
How do diseases enter the body
nose/lungs, mouth/digestive tract, cuts in skin/burns, sexual transmission, blood to blood contact
protozoans
small, single-celled organisms common in water and soil
Prions
abnormally folded protein that causes progressive neurodegenerative conditions
How can infectious diseases be transmitted
Direct: shaking hands, kissing, sexual intercourse
Indirect: insects, mosquitoes, fleas, air, contaminated water
rubella
transmission, symptoms, treatment, prevention/control
RNA virus
direct contact with nasal or throat secretion of infected individual
Low grade fever, sore throat, rash across face that spreads to body
No medicine or treatment, bed rest and medicine for fever
Getting vaccinated
Malaria
transmission, symptoms, treatment, prevention/control
Plasmodium parasite
Bitten by an infected female Anopheles mosquito
Fever, shaking chills, headache, nausea, vomiting, diarrhea, anemia and jaundice (loss of red blood cells)
Antiparasitic, antibiotics, antimalarial drugs
Take protective drugs before, during and after trip
Potato blight
plant affected, type of pathogen
caused irish potato famine
potato
fungus