specific bacterial diversity Flashcards
gram positive bacteria
low and high GC
low GC
clostridium, staphylococcus, streptococcus, bacillus, lactobacillus
high GC
frankia, streptomyces, actinomyces
lactobacillus
- rod shaped
- fermented products are an important commensal in human gut flora
bacillus
- rod shaped
- endospore forming
- can survive extreme environments
staphylococcus
- coccus
- medicallly important
- MRSA
- found in nose and harmless skin bacteria
streptococcus
‘twisted chain’
- coccus
- divide on a single axis therefore the progenitor cells grow in pairs or chains
frankia
filamentous
- carry out nitrogen fixation in soil
- atmospheric N- NH3
actinmyces
facultative anaerobe
- looks like fingal hyphae
- soil ecology
streptomyces
- from mycelia
- produces conidia spores not the same as endospores
- produce antibiotics
streptomycin antibiotics
active against gram positive/ negative bacteria and fungi, in times of nutrient depletion- survival mechanism
types of proteobacteria
alpha, gamma, beta, delta, epsilon
alpha
rhizobiales
example of rhizobial
bradyrhizobium/rhizobium- form symbiosis with plants and fix nitrogen to ammonia
beta
neisseriales
example of neisseriales
neisseria- meningitis and gonorrhea
gamma
enterobacteria
example of enterobacteria
shigella/ salmonella/ e.coli
episilon
campylobacterales
campylobacterales example
campylobacter and helicobacter
camplobacter
high motile bacillus e.g. food born disease- C.jejuni
helicobacter
has multiple flagella and causes stomach ulcers e.g. H.pylori
