Bacterial studies on debris taken from the gingival sulcus of man
Date
2015-01-15
Authors
Coogan, Maeve M
Journal Title
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Abstract
The gingival sulcus micro-ecology of three categories
of people was studied. Samples of debris were removed
from the gingival sulcus of ten male Bantu
subjects with pockets of 1 - 2 mm, ten male Bantu subjects
with pockets of 3 - 6 mm and twenty male Caucasian
subjects with pockets of 1 — 2 mm. The samples
were placed in cooked meat medium which was incubated
at 37°C for thirty days. They were plated out daily
from the cooked meat onto a variety of media. Organisms
cultured were identified to the genus level.
Changes in the pH and amino acids in the medium were
studied in ten of the samples taken from the Bantu
subjects. Organisms isolated were classified as
dominants, associates and incidentals. Dominants were
stable, had a high incidence and persisted in the
medium. They included the aerobic streptococci,
actinomyces,C(-haemol'/tic streptococci, mitis-type
streptococci and the enterococci. Associates were not
stable or did not survive well and could be divided
into five groups. The first group consisted of the
veillonella, lactobacilli, -haemolytic streptococci
and the sarcina. They were favoured by deep pockets.
The second group was favoured by shallow pockets and
the environment of the Bantu and consisted of the
anaerobic streptococci, staphylococci, bacteroides,
neisseria, selenomonas, fusobacteria, diplococci,
Clostridia, loptotrichia and polysaccharide-producing
streptococci. This group contained a number of pathogens
and the significance of this finding is discussed.
iv/...The third/.