The following are the test that is used to detect the presence of cellulitis. They include Blood Culture
Complete blood count with deifferential levels of creatinine, bicarbonate, creatinr phosphokinase and C-reactive protein(CRP).
They may play a role in the detection of occult abscess and direction of care.
Ultrasonic-guided aspiration of pus can shorten hospital stay and fever duration in children with cellulitis.
If necrotizing fasciitis is necrotizing fasciitis is a concern, CT imaging is typically used in stable patients; MRI can be performed, but MRI typically takes much longer than CT scanning.
Strong clinical suspicion of necrotizing fasciitis should prompt surgical consultation without delay for imaging
Aspiration, Dissection and Biopsy:
Needle, aspiration should be performed in selected patients or in unusual cases, such as in cases of cellulitis with bullae or in patients who have diabetes are immunocompromised are neutropenic are not.
Aspiration or punch biopsy of the inflamed area may have a culture yield of 2-40% and is of limited clinical value in most cases .
Gram stain culture and drainage of abscess provides a better relief.
Admission of the patient to the hospital is required when the following is taken into an account:
Elevated creatinine level
Elevated creatine phosphokinase level( it will be 2-3 times the upper limit of normal)
CRP level is greater than 13 mg/L(123.8mmo/L)
Low serum Bicarbonate level
Variations in the complete blood count.