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ID q.3 - chapper
#1
A 65 year old patient with diabetic foot over his 4th metatarsal head for 3 mths comes to your office. He was prescribed to offload his foot but he is non-compliant. Now, he presents with dull throbbing pain with fever. Ulcer examination reveals: putrid-smelling wound notable also for a pus-filled 2.5 cm wide ulcer. A metal probe is used to probe the wound and it detects bone as well as a 3-cm deep cavity. The gram stain revals gram-positive cocci in chains, gram-positive rods, gram-negative diplococci, enteric-appearing gram-negative rods, tiny pleomorphic gram-negative rods, and a predominance of neutrophils. Which antibiotics are used now till you get back the blood and drainage cultures?
1. Vancomycine, 1g IV BID
2. Linezolid, 600 mg PO tid
3. Clinidamycin, 600 mg PO tid
4. Ampicillin/ sulbactam, 1.5 g, IV q 4h
5. Metronidazole, 500 mg PO qid
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#2
222
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#3
@begin3...nope...
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#4
vanc always
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#5
good question..its difficult

4 coves g-ve,g+ve & anaerobic
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#6
1..
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#7
4..
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#8
Ans is 4...

Stain shows Polymicrobial & putrid smell which is specific to anerobes...

The pt has osteomyeltis also-rite..so braod spectrum antibiotics are needed...

Vanco & Linezolid are used for MRSA and Strep issolates but will miss gram neg rods & anerobes...

Metronidazole is for anerobes & will miss gram pos- gram pos are very IMP as they initiate diabetic foot ulcers...

Clindamycin covers gram positive and anerobes but will not cover gram negatives rods..

SO AMPICILLIN/ SULBACTAM is the CHOICE AS IT COVERS GRAM POSITIVES, GRAM NEGATIVES & ANEROBES...

vanco & linezolid are only used if the pt has a history of MRSA or MRSA risk factors, then u add vanco or linezolid




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#9
11
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