[Microbiology] Atlas of Neisseria Species and Moraxella catarrhalis

Neisseria Species and Moraxella catarrhalis, Atlas of Neisseria Species and Moraxella catarrhalis, MICROBIOLOGY ATLAS, SUBCLINICAL ATLAS, tuyenlab.net, atlas in medical

Fig 1. Characteristics of the family and the six genera. Moraxella catarrhalis,
although morphologically and biochemically similar to the Neisseria spp., is no longer a
member of the family Neisseriaceae, so it is not included here.

Fig 2. Cellular structure of Neisseria gonorrhoeae.

Fig 3. Virulent Neisseria gonorrhoeae after 24 hours
of growth on modified Thayer-Martin (MTM) agar.

Fig 4. Twenty-four hour growth of Neisseria
gonorrhoeae on a JEMBEC plate streaked in a characteristic
Z pattern.

Fig 5. A, Direct Gram-stained smear of male urethral discharge showing intracellular and extracellular, gramnegative diplococci, which is diagnostic of Neisseria gonorrhoeae. B, A direct smear with more than five polymorphonuclear neutrophils per field, but no bacteria, may suggest nongonococcal urethritis.

Fig 6. Candle extinction jar with inoculated
modified Thayer-Martin agar plates.

Fig 7. A, To differentiate some gram-negative rods from the gram-negative diplococci, the organism can be streaked to a plate and a 10-unit penicillin disk added. After growth, the edge of the zone of inhibition is stained to visualize microscopic morphology. B, The microscopic morphology of Neisseria gonorrhoeae remains gramnegative diplococci using the 10-unit penicillin disk. C, The gram-negative rod microscopic morphology of Kingella spp. after the penicillin disk test. D, The elongate gram-negative rod microscopic morphology of Acinetobacter spp. after the penicillin disk test.

Fig 8. A, The oxidase disk test. The negative control is on the left and the
positive reaction (purple) is on the right. B, Example of a positive oxidase reaction when
the reagent is dropped directly on the colony.

Fig 9. A, Petechial skin rash associated with
meningococcemia in a baby. B, Waterhouse-Friderichsen
syndrome illustrating hemorrhage (dark red areas) in the
adrenal glands.

Fig 10. Direct Gram-stained smear of cerebrospinal
fluid illustrating intracellular and extracellular gram-negative
diplococci of Neisseria meningitidis.

Fig 11. Growth of Neisseria meningitidis after 48
hours on chocolate (CHOC) agar on the left and sheep blood
agar (SBA) on the right. Of the classic Neisseria pathogens,
only the meningococcus grows on SBA and CHOC agar.

Fig 12. A, Direct smear of an otitis media specimen
illustrating intracellular, gram-negative diplococci.
The organism was identified biochemically as Moraxella
catarrhalis from cultures. B, Growth of M. catarrhalis after
48 hours, illustrating the wagon-wheel appearance on
chocolate agar.

Fig 13. Colony morphology of Neisseria cinerea on
sheep blood agar (48-hour culture).

Fig 14. Culture of Neisseria lactamica after 48 hours
on blood agar (left) and chocolate agar (right). This
organism resembles Neisseria meningitidis.

Fig 15. Dry, wrinkled, breadcrumb-like colony
morphology of Neisseria sicca on sheep blood agar (48-hour
culture).

Fig 16. Yellow pigmentation of Neisseria subflava
on sheep blood agar (48-hour culture).

This is only a part of the book : Textbook of Diagnostic Microbiology 4th edition 2011 of authors: Connie R. Mahon, Donald C. Lehman and George Manuselis. If you want to view the full content of the book and support author. Please buy it here: https://goo.gl/IawVC1