Property:AnswerDExp
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P. multocida is reported to be resistant to dicloxacillin, cephalexin, and clindamycin; many strains are resistant to erythromycin. +
Although vancomycin provides adequate coverage for staphylococcal species, it does not cover ''Salmonella'' species, which are highly likely in this case given the history of thalassemia and the culture results. +
Agents that lack anaerobic coverage as well as coverage against ''Eikenella corrodens'', ''Haemophilus'' species, and ''Staphylococcus aureus'' are not appropriate for prophylaxis. Although clindamycin has anerobic and staphylococcal coverage, it does not cover ''Eikenella''. +
Amyl nitrite is used in cyanide poisoning. It oxidizes iron to the ferric state and actually causes methemoglobinemia to decrease the binding of cyanide to hemoglobin. +
Ostium secundum atrial septal defect (ASD) is the most common type of ASD. It arises from inadequate growth of the septum secundum and comprises up to 10% of all cases of congenital heart diseases. Although ASD is associated with Down syndrome, endocardial cushion defects are more common. +
<font color="red">'''Incorrect.'''</font>It is an osmotic diuretic used to force diuresis and protect from the myoglobinuria damage. It does not prevent arrhythmias following crush injury-related hyperkalemia. +
<font color="red">'''Incorrect.'''</font> The patient is hemodynamically stable therefore he cannot be placed into a CT scanner. +
Heat-stable toxin (STa) of ETEC involves activation of guanylyl cyclase that enhances intestinal secretion. +
In EPEC, attachment of epithelium and effacement of microvilli is mediated via phosphorylation of Tir and subsequent intimin binding. +
Clindamycin and macrolides block translocation by binding to the 50S rRNA of the large bacterial ribosome subunit. +
Adherence to intestinal epithelium may be mediated by colonizing factor antigen (CFA) of ETEC, Tir (translocated intimin receptor) of EPEC, or surface adhesins. +