It is so small that it can squeeze

between intestinal cells.

It secretes enzymes that create

perforations in the intestine.

It secretes a toxin that induces its

uptake into intestinal epithelial cells.

It can get to the blood only if the

bacteria are deposited directly there, that is, through a puncture.

T cells

basophils

macrophages

B cells

swabbing the

throat and culturing in the lab

Bacterial pharyngitis results in

swollen lymph nodes; viral does not.

serological testing

There is no way to tell.

High

mortality, spread by air droplets, natural host is rats

Low mortality,

spread by air droplets, natural host is bats

Low

mortality, spread by blood and body fluids, natural host is bats

High

mortality, spread by blood and body fluids, natural host is bats

insects such as mosquitoes

freshwater stream and cooling towers

animal and animal urine

animals only

humans only

Streptococcus agalactiae

Neisseria meningitidis

Listeria monocytogenes

Haemophilus

influenzae

analysis of

symptoms

culturing the

bacteria in the lab

an electrocardiogram

an echocardiogram

85% of women are asymptomatic.

Women always show symptoms.

Neither men nor women ever show

symptoms.

95% of men are asymptomatic.

Vibrio

cholerae.

Helicobacter pylori.

all of the above.

Campylobacter jejuni.