What are gram-negative diplococci?

Types. Examples of gram-negative diplococci are Neisseria spp. and Moraxella catarrhalis. Examples of gram-positive diplococci are Streptococcus pneumoniae and Enterococcus spp. Presumably, diplococcus has been implicated in encephalitis lethargica.

What is the shape of Diplococcus pneumoniae?

Pneumococcus (Streptococcus pneumoniae): Are Gram-positive bacteria in the shape of a slightly pointed cocci. They are usually found in pairs (diplococci), but are also found singly and in short chains.

What are the symptoms of gram-negative bacteria?

Symptoms of gram-negative meningitis in adults include:

confusion.
high fever, sweats, and/or chills.
lack of interest in eating or drinking.
nausea.
seizures.
sensitivity to light.
severe headache.
sleepiness.

What disease is caused by Diplococci?

Bacteremia due to Diplococcus pneumoniae frequently occurs during the course of pneumococcal pneumonia, particularly when the infection is fulminating. Endocarditis, most commonly involving the aortic valve, may complicate pneumococcal pneumonia and is characterized by persistent pneumococcal bacteremia.

What causes Pseudomonas dogs?

Common underlying causes of Pseudomonas otitis include allergy, endocrine disease, immune-mediated disease and neoplasia. The aim in all cases should be to resolve infection aiming for an end point of normal ear canal cytology, manage underlying primary causes, and reverse any chronic change within the ear canal.

What is the structure of Streptococcus pneumoniae?

pneumoniae is roughly six layers thick and is composed of peptidoglycan with teichoic acid attached to approximately every third N-acetylmuramic acid. Lipoteichoic acid is chemically identical to the teichoic acid but is attached to the cell membrane by a lipid moiety.

What does Streptococcus pneumoniae look like?

Streptococcus pneumoniae cells are Gram-positive, lancet-shaped cocci (elongated cocci with a slightly pointed outer curvature). Usually, they are seen as pairs of cocci (diplococci), but they may also occur singly and in short chains. When cultured on blood agar, they are alpha hemolytic.

What infections are caused by Gram-negative bacteria?

Gram-negative bacteria cause infections including pneumonia, bloodstream infections, wound or surgical site infections, and meningitis in healthcare settings. Gram-negative bacteria are resistant to multiple drugs and are increasingly resistant to most available antibiotics.

Which is the Gram negative diplococcus bacterium?

Neisseria gonorrhoeae, Gram-negative diplococcus bacterium, revealed in the photomicrograph of a urethral discharge specimen, 1978. Image courtesy… Photomicrograph of Neisseria gonorrhoeae colonies growing on GC base media with IsoVitalex after 24 hours, 1972. N. Gonorrhoeae, a gram-negative…

What kind of infections can diplococci bacteria cause?

N. meningitidis are gram-negative diplococci (spherical bacteria arranged in pairs), transmitted by the respiratory route. In most people they cause either asymptomatic infections or non-severe nasopharyngitis, but can also cause severe meningitis and generalised infection (meningococcaemia), particularly in children.

Is the presence of extracellular diplococci presumptive?

The presence of extracellular diplococci is a questionable finding, and definitively determining the presence of Neisseria gonorrhoeae bacteria, would have to be confirmed through additional tests, including culturing, or a nucleic acid test. The presence of intracellular diplococci, is diagnostically presumptive in the case of N. gonorrhoeae.