exam 2 Flashcards
pathogenic microorganisms
bacteria rickettsiae mycoplamsa viruses fungi
classificstion of bacteria
shape and arrangemneg
gram stain
biochemical and growth
antigenic structure
coccus
spherical
pairs
kidney bean shaped
bacillus
rod shaped
comma shaped
spriochete
spiral
tightly coiled
gram stain
postive or negative
based on chemical and physical properites of cell walls
gram postive
stains purple
gram negativr
stains red
obligate
needs oxygen
facultative
prefers oxygen
fastidious organisms
only be grown on enrimched media under careful conditions
hardy organisms
grown in simple media
aerobic organisms
bacteria grow best in prescence of oxygen
anaerobic organisms
bacteria grows best without oxygen
flagella
hair like processes
mobility
spores
dormant
extremely resistant bacterial modification
germinate and give rise to actively growing bacteria
where can staphylococcus be found
nasal cavity
skin
not pathogenic
opportunistic
produce toxins
staphylococci infections
skin infection sepsis endocarditis arthritis pneumonia abscess
where can streptococci be found
skin mouth pharynx gut female genital tract
opportunisitc
alpha hemolysis
incomplete lysis of red cells
not pathogenic
beta hemolysis
complete lysis of red cells
extremely pathogenic
antibiotics
destroy bactera or inhibit their growth
bacteria cel structure
genetic material produce proteins enzymes semipermeable cel membrane rigid cell wall
plasmids
smaller DNA molecules
anitbiotic resitance
toxin production
how do antibiotics work
interefer with structure pr funktion of cell
inhibit cell wall synthesis
inhibit cell membrane funktion
inhibit metabolic funktions
competiive inhibition
competivie inhibition
antibiotic resembes bacterial nutrients amd bacteria does not kneo
antibiotic resistance factors
over prescribing inaappropriate prescribing overuse as feed supplement for animals improper use spread strains worldwide
rickettsiae
obligate intracellulse parasite
insect to human via bite
repsonds to some antibioticd
causes damage to skin
ROCKY MOUNTAIN SPOTTED FEVER
mycoplasma
smallest, wall less, free living bacteria
penicillin is not affectivr
pneumonia
virus
smallest infectious agent
have DNA or RNA in a capsid
lipid envelope
attaches to crlls
viruses dont have
nucleis
ribosomes
mitochondria
lyses
rely on host cell
hijacks the cell
classificstion of virsuses
nucleic acid structure
size
structural configurstion
biological characterisitcs
tissues infected wtih virus contain
inclusion bodies
defense against viruses
form interferon
antiviral antibiotics
fungi
plantlike without chlorophyll
yeasts and molds
obligate aerobes
oppourtnisitc
yeasts
small
reproduce via budding
molds
large colonies called hyphae
animal parasites
protozoa
metazoa
arthopods
protozoa infections
malaria- plasmodium
metazoa infections
roundworms
tapeworms
flukes
types of roundworms
ascaris
pinworms
trichinella
arthopod infections
scabies
crab louse
head lice
communicable disease
person to person
endemic
small number affected
epidemic
large number affected
direct transmission
physical contact
droplet spread- sneeze/cough
indirect transmission
contaminated food ornwater
insects
methods to contrill communicable diseases
eradicate or control disease
identify
isolate
treatment
control contaminated food or water
chlorination of water supplies
effective sewage
standards and laws
requirements for effective control
cause of disease
methods of transmission
four major stds
syphilis
gonorrhea
herpes
hiv/aids