Table 7-3 will familiarize you with commonly
encountered bacteria. This table lists the bacterias
morphologic shape, Gram stain response, genus and
species, and the type of infection it produces.
There are a variety of methods used in the
laboratory to identify bacteria. However, only a few of
these bacteriologic methods can be performed in
isolated duty locations or on board naval vessels. One
of these methods is the smear. The smear permits
healthcare personnel to examine specimens
Material requirements and the
step-by-step procedures for making smears is covered
in the following sections.
A smear is the procedure in which a specimena
body fluid or a dischargeis spread across a glass slide
for microscopic examination.
To enhance the
visualization of microorganisms on the smear, Gram
staining (introduced earlier in this chapter) is used.
Once the smear is stained, it is ready to be examined
under the microscope. Normally, smears are examined
by laboratory technicians who prepare reports of their
MATERIALS REQUIRED FOR SMEAR.To
perform a smear, the following materials are required:
Genus & Species
Type of Infection
Streptococcus pyogenes (Beta
Streptococci Group A)
Boils, furuncles, osteomyelitis,
endocarditis, and impetigo
(all are anaerobic and
Yersinia (Pasteurella) pestis
Table 7-3.Common Bacteria