infectious diseases in humans Flashcards
definition of disease
condition that causes the body to function less effectively
definition of pathogen
disease causing organism such as bacteria and viruses
non infectious disease ?
cannot spread from person to person
not caused by pathogens
may be inherited or caused my surroundings
infectious disease ?
can be spreads from person to another droplets of air direct contact
caused by pathogen
prevention methods
practicing good hygiene
maintaining clean water and raw materials supply
ensuring proper sanitation
definition of influenza
attacks respiratory system
signs symptoms highfever headache stuffy nose
pnenmococcal disease
attacks everywhere and because of pneumococcus bacteria
fever headacghe vommitting
what is a vaccine
contains an agent that resembles a pathogen and prevents infectious diseases by stimulating white blood cells to quickly produce antibodies when pathogen invades
what are antigens
substances that trigger the production of antibodies
antibiotics definition ?
interferes with growth and metabolic activities of the pathogen
how does a antibiotic work ?
1 - weakens cell wall allowing water to enter cell by osmosis causing it to burst
2- inhibits some enzyme,es thus inhibits growth of bacteria
3- prevents ribosomes from making proteins and enzymes thus killing bacteria
4- breaks up bacterial cell membranes
how to be reduced
completing course given by doctors
not misusing or overusing antibiotics to treat viral infection instead of bacterial
what are antibioctics for
bacterial infections
