Chapter 17 Flashcards
What genera make up the family Neisseriaceae?
Neisseria
Kingella,
Eikenella,
Simonsiella,
Alysiella, and several other genera.
General characteristics of Neisseria spp.
mbost Neisseria spp. are
aerobic,
nonmotile,
non- spore-forming
gram-negative diplococci.
Which Neisseria spp are are rod shaped
Neisseria elongata, Neisseria weaveri, and Neisseria bacilliformis are known exceptions and are rod shaped.
All Neisseria species are cytochrome oxidase and catalase positive except for
N. elongata subsp. nitroreducens and N. bacilliformis, which are catalase negative.
Many Neisseria spp. are capnophilic? T/F?
T
Can Neisseria spp. grow anaerobically and how?
Yes. If the alternative electron acceptors are available such as Nitrites.
Where are the natural habitats of Neisseria spp.
mucous membranes of the respiratory and urogenital tracts
Neisseria gonorrhea is also known as
GonoCOCCI
Neisseria meningitidis is also known as
MeningoCOCCI
All Neisseria genera are oxidase positive?
True!
All Neisseria genera are catalase negative except
Neisseria
Which species of Neisseria are pathogenic
Neisseria gonorrhoeae
Neisseria meningitidis
*Neisseria weaveri (bacillus)
Which species of Neisseria is normal oral flora biota of dogs and can be found in bite wounds.
Neisseria weaveri (bacillus)
morphologically and biochemically similar to the Neisseria spp. but is NOT a member of the family Neisseriaceae
M. catarrhalis
Growth requirements for N. gonorrhoea and N. meningitidis?
Both N. gonorrhoeae and N. meningitidis require iron for growth.
They compete with their human host by binding human transferrin to specific surface receptors.
OF NOTE:
Transferrin is a blood plasma glycoprotein that plays a central role in iron metabolism and is responsible for ferric-ion delivery. Transferrin functions as the most critical ferric pool in the body. It transports iron through the blood to various tissues, such as the liver, spleen, and bone marrow.
