Staphylococcus aureus
Terrance Holderby

Spider Attack! ...I Think

“Aaahhh! I think I have a spider bite! Look at it!” cried little Bobby Jenks to his mother. “Am I gonna die?” he whined again.
“Oh Wow, you do have something there. We ought to get this checked out. It really does look like a spider bite.” His mother reasoned.
Bobby noticed one morning that he had quite a swollen hand from what seemed like came from a spider bite. His mother decided to look online for a picture comparison.
“Well, it looks like you have a bite similar to the brown recluse spider. This isn’t good one bit.” she declared. “Take you to the doctor’s office.”

What Bobby’s mother saw online looked something like this:

After several tests Dr. Stiazny had an interesting conclusion.
“I don’t believe Bobby has a brown recluse spider bite at all. As a matter of fact he doesn’t have a bite of any sort at all.” Dr. Stiazny announced.
“Well, then what is it?” Bobby and his mother beckoned.
“It appears to be a staph infection from the Staphylococcus aureus.” He determined.
What Bobby actually had looked more like this:

Community Acquired Methicillin-Resistant S. aureus or CA-MRSA very often is mistaken for a spider bite due to its similar infection presence on human skin. As a matter of fact, “Spider bite--appearing lesions are a classic presentation of MRSA.”C MRSA originated by infection from the hospital in which it was called Hospital Acquired MRSA or HA-MRSA. In order to be considered community acquired instead of hospital acquired, the patient must remain from hospital contact for a period of two years before contracting the infection.C
S. aureus in general is a facultatively anaerobic, Gram-positive coccus or spherical shaped microbe.D S. aureus is usually spread through human to human contact.
It has become very resistant to antibiotics. In fact, only about 2% of S. aureus is affected by penicillin. β-lactamase-resistant penicillins had to be developed to treat these resistant strains.E

The following is a typical S. aureus:

A)  http://www.e-bug.net/pests/brownrecluse.shtml
B)  http://cme.medscape.com/viewarticle/482893
C)  http://www.highbeam.com/doc/1G1-168434735.html
D)  Ryan KJ, Ray CG (editors) (2004). Sherris Medical Microbiology (4th ed. ed.). McGraw Hill.
E)  Jevons MP (1961). "Celbenin-resistant staphylococci". BMJ 1: 124–5
F)  http://www.britannica.com/EBchecked/topic-art/563360/75891/Gram-positive-Staphylococcus-aureus-from-a-laboratory-culture

 

*Disclaimer - This report was written by a student participaring in a microbiology course at the Missouri University of Science and Technology. The accuracy of the contents of this report is not guaranteed and it is recommended that you seek additional sources of information to verify the contents.

 

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