Medical Microbiology

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