IDENTIFICATION
CAUSATIVE AGENT
REMARKS
SPECIES
GROUP
Exototoxin causes
Vibrio cholerae
Cholera
GRAM-NEGATIVE BACILLI
"rice water" stool
(continued
Diarrhea
Food poisoning
Vibrio parahemolyticus
from
contaminated
shellfish.
SMALL GRAM-NEGATIVE
BACILL
Non-motile,
Brucella abortus
Occurs in cattle
Contagious abortion in
nonsporeforrning
B. suis
0ccurs in swine
animals; brucellosis
B. melitensis
0ccurs in sheep
(undulant fever) in man
Hemophilus influenzae
More common
Pharyngitis. otitis. sinusitis,
pathogen in
pneumonitis, or meningitis.
children
Bordetella pertussis
Whooping cough
Encapsulated
Exotoxin
H. ducreyi
Chancroid
Yersinia pestis
Plague
Francisesella tularensis
Tularemia
A typical bacteria
Chamydia trachomatis
A typical bacteria
Urethritis. inclusion
conjunctivitis. Trachoma.
lymphogranuloma venereum
C. psittaci
Psittacosis (parrot fever,
A typical bacterium,
ornithosis
requires living
host cell
Mycoplasma (Ureplasma)
Nongonococcal urethritis
A typical bacterium,
no cell wall
requires special
culture
Mycoplasma pneumonia
Primary, atypical pneumonia
A typical bacterium,
no cell wall
requires special
culture
SPIROCHETES
Treponema pallidum
Syphilis
Does not stain with
ordinary stain nor
Borrelia recurrent is
Relapsing fever
grow on artificial
media
Leptospirosa
Leptospirosis (Weil's disease,
May be stained and
ichterohemorr hagiae
infectious jaundice)
cultured (chick
(also L. canicola,
embryo)
L. autumnalis, and
L. pomona)
Table 2-2. Pathogenic bacteria of public health importance. (concluded)
discussed in paragraph 2-9. The student should bear in mind that bacteria may fall into
several groups; therefore, the appearance of a species under a particular heading in
Table 2-2 does not imply that it may not be appropriately shown under another heading.
MD0151
2-16