ch 4.3 nonproteobacter Flashcards
What are the four categories of nonproteobacteria
chlamydia
spirochetes
CFB group
planctomycetes
what is C. trachoma’s
human pathogen that causes trachoma a disease of the eye that leads to blindness and sexually transmitted disease lymphogranuloma venereum
describe members of the genus chlamydia
gram negative, obligate intracellular pathogens that are resistant to cellular defenses giving them ability to spread from host to host rapidly via elementary bodies
what are elementary bodies
endospore like form of intracellular bacteria that enter epithelial cell where they become metabolically and reproductively active
What are spirochetes characterized as
spiral shaped bodies, most are very thin making it difficult to examine gram-stained preparations under brightfieqld microscope
highly motile, use axial filament to propel themselves
what is axial filament
similar to flagellum but it wraps around the cell and runs inside the cell body of a spirochete in the periplasmic space between outer membrane and plasma membrane
Examples of spirochetes
Genus treponema which includes
T. Pallidum pallidum
T palidum pertenue
T. pallidum carateum
t. pallidum endemicum
what causes syphilis
T pallidum pallidum
what do other T pallidum subspecies cause
tropical infectious diseases of skin bones and joints
What does Borrelia contain
B. burgodrferi (Lyme disease)
What similarities do the CFB group have
sequence of nucleotides in their DNA
rod-shaped bacteria adapted to anaerobic environments such as gums, gut and rumen
avid fermenters able to process cellulose in Ruben `
what are cytophaga
motile aquatic bacteria that glide
inhabit human mouth and may cause severe infectious disease
what do bactericides include
species in the human large intestine 30% of gut
how much bactericide cells in 1g human gut
100 billion
what is the relationship between us and bacteroids
mutualistic
they get nutrients and we get ability to prevent pathogens from colonizing large intestine
where are planctomycetes found
aquatic environments, freshwater, saltwater and brackish water
what makes planctomycetes unusual
they reproduce by budding
mother cells forms a bud that detaches from the mother and lives as an independent cell (motile and not attached to a surface
describe nonproteobacteria morphology and unusual characteristics of chlamydia
Gram negative, coccoid or ovoid
obligatory intracellular bacteria can cause chlamydia, trachoma and pneumonia
describe nonproteobacteria morphology and unusual characteristics of bacteroides
gram negative bacillus
obligate anaerobic bacteria
In GI tract
usually mutualistic but can be opportunistic pathogen
describe nonproteobacteria morphology and unusual characteristics of cytophaga
gram negative bacillus
motile by gliding
live in soil or water
decompose cellulose
may cause disease in fish
describe nonproteobacteria morphology and unusual characteristics of fusobacterium
gram negative bacillus with pointed ends
anaerobic
form biofilms
can cause periodontitis, ulcers
describe nonproteobacteria morphology and unusual characteristics of leptospira
spiral shaped bacterium, gram negative-like (view in dark field
aerobic
abundant in shallow water reservoirs
infects rodents and domestic animals
describe nonproteobacteria morphology and unusual characteristics of treponema
gram-negative-like spirochete, very thin, use dark field microscope
motile
to not grow in culture
causes syphilis
describe nonproteobacteria morphology and unusual characteristics of borrelia
gram-negative-like spirochete
causes Lyme disease