Is Pasteurella multocida a Gram stain?

Pasteurella multocida is a small, gram-negative, nonmotile, non–spore-forming coccobacillus with bipolar staining features. The bacteria typically appear as single bacilli on Gram stain; however, pairs and short chains can also be seen.

Is Pasteurella multocida Gram positive or negative?

Pasteurella multocida is a facultative anaerobic, fermentative Gram-negative coccobacillus found in the oropharynx of healthy animals, particularly cats, dogs, and pigs, as well as various wild animals.

Is Pasteurella gram positive?

Pasteurella spp. are fastidious Gram negative rods that grow well on all types of differential and selective agars. All of the following organisms may be routinely recovered from cat bite wounds except: streptococci.

What bacteria shows bipolar staining?

Yersinia pestis is a small, Gram-negative coccobacillus, which frequently shows strong bipolar staining.

Does Pasteurella multocida grow on MacConkey Agar?

They do not grow on MacConkey agar. They are usually oxidase positive and also positive for nitrate reduction, phosphatase, β-galactosidase and acid production from D – Glucose fermentation. They are negative for catalase, indole, urease, Voges-Proskauer and methyl red tests.

What bacteria is Gram-negative Coccobacilli?

The Gram-negative coccobacilli, Haemophilus influenza can cause a variety of infections, including meningitis, an infection that results in inflammation of the brain and spinal cord, as well as pneumonia, an infection of the lungs.

Is Pasteurella beta hemolytic?

Pasteurella multocida does not cause hemolysis on blood agar, and grows in carbon dioxide-rich medium at 37°C [4, 5]. It can involve skin and soft tissue, bone and joint, upper and lower respiratory tract, and cause more severe infections such as meningitis, bacteremia, endocarditis and peritonitis.

Is tularemia Gram positive or negative?

Tularemia is infection that is caused by the gram-negative bacteria.

Is Pasteurella a rod or cocci?

Pasteurella multocida are aerobic, non-motile, ovoid or rod-shaped gram-negative cocco-bacilli with bipolar staining. They can be very pleomorphic on smears of exudates suggesting mixtures of Haemophilus and Neisseria species.

Does Pasteurella multocida grow on chocolate agar?

Pasteurella spp are aerobic, facultatively anaerobic, and grow well at 37°C on 5 percent sheep blood (the preferred culture medium), chocolate, or Mueller-Hinton agar; growth is uncommon on MacConkey’s agar.

What are Palisades bacteria?

Palisade Bacteria: This particular arrangement is formed during the process of cell division when the bacteria or bacilli bend at the area of the division leading to the formation of a palisade-like arrangement. This bacteria resembles a picket fence or Chinese letters.

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