TaxonomyandOverviewofHumanPathogenicBacteria 225
Table3. 9 Continued:OverviewoftheMedicallyMostImportantBacteria
Family
Genus,species
Characteristics Clinical
manifestations
Continued:Section8.
“Xanthomonadaceae”
Stenotrophomonas
maltophilia
Lowpathogenicity Nosocomialinfections.
Oftenresistancetomulti-
pleantibiotics
Legionellaceae Motile,difficulttostain,
requiresspecialculturing
mediums
Legionellapneumophila Mostfrequentspecies,
aquaticbiotopes
Legionnaire’spneumonia,
Pontiacfever
Brucellaceae Shortrods,nonmotile,
facultativeintracellular
parasite,fastidiousgrowth
Zoonoses
Brucellaabortus
Brucellamelitensis
Brucellasuis
Brucellacanis
Transmissionviadirect
contactorfoods(milkand
milkproducts)
Brucellosis(Bangdisease,
Maltafever)
Alcaligenaceae
Bordetellapertussis Shortrods,nonmotile,
onlyinhumans
Pertussis(whooping
cough)
“Francisellaceae”
Francisellatularensis Minutepleomorphicrods.
Requiresenrichedmedia
forculturing
Tularemia,zoonosis
(rodents)
Section9.Gram-negativerods,straight,curved,andhelical,strictlyanaerobic
Bacteroidaceae
“Fusobacteriaceae”
“Porphyromonadaceae”
“Prevotellaceae”
Pleomorphicrods,major
componentofnormal
mucosalflora
Subacutenecrotic
infections,mostlytogether
withotherbacteria
Bacteroidesspp.
Porphyromonasspp.
Prevotellaspp.
Fusobacteriumspp.
NecroticabscessesinCNS,
headregion,lungs,abdo-
men,femalegenitaltract
3
Kayser, Medical Microbiology © 2005 Thieme