An oxidase-positive, gram-negative rod which produces a bluish-green pigment has been grown in culture from a swab obtained from an infected burn wound. This organism is susceptible to gentamicin, ticarcillin and tobramicin, but resistant to all the other antibiotics which of the following organisms is it likely to be ?

Related Mcqs:

1. A veterinary doctor had pyrexia of unknown origin His blood culture in special laboratory media was positive for gram negative short bacilli which was oxidase positive. Which one of the following is the likely organism grown in culture ?

   A. Pasturella spp
   B. Francisella spp
   C. Bartonella spp
   D. Brucella spp

2. A diabetic patient developed cellulitis due to staphylococcus aureus, which was found to be Methicillin resistant on the antibiotic sensitivity testing. All of the following antibiotics will be appropriate EXCEPT________________?

   A. Vancomycin
   B. Imipenem
   C. Teichoplanin
   D. Linezolid

3. IF a bacteria were susceptible to both penicillin and Erythromycin, then it would not be appropriate to treat the patients with both antibiotics at the same time because_______________?

   A. Penicillin is inactivated by erythromycin
   B. Erythromycin exerts its effects extracellularly
   C. Erythromycin enhances the B-lactamases activity
   D. Penicillin is only effective against growing cells

4. A diabetic patient developed cellulitis due to Staphylococcus aureus, Which was found to be Methicillin resistant on the antibiotic sensitivity testing. All the following antibiotics will be appropriate except_____________?

   A. Vancomycin
   B. Imipenem
   C. Teichoplanin
   D. Linezolid

5. A child presents with infective skin lesions of the leg. Culture was done which showed gram positive cocci in chains and haemolytic colonies. Which of the following tests will best identify the organism ?

   A. Bile solubility
   B. Optochin sensitivity
   C. Bacitracin sensitivity
   D. Cataslase positive

6. The best way of detecting the presence of viruses in the infected cell – culture is____________?

   A. Cytopathic changes in culture cells
   B. Presence of viral protein in the infected monolayer
   C. Haemagglutination test
   D. Haemagglutination inhibition test

7. Combination of ampicillin and gentamicin is an example of_____________?

   A. Indifference
   B. Synergy
   C. Antagonism
   D. Bacterial symbiosis

8. In humans and other primates as well as in guinea pigs, this vitamin cannot be synthesized because of the absence of the enzyme L-gulonolactone oxidase: the vitamin is_____________?

   A. Pantothenic acid
   B. Nicotinic acid
   C. Ascorbic acid
   D. Folic acid

9. Diphtheria is pathogenic only when infected with______________?

   A. Beta phage
   B. Alfa phage
   C. Lambda K12
   D. Delta Phage

10. Virus infected cell is killed by________________?

    A. Interferons
    B. Macrophages
    C. Neutrophils
    D. Autolysis