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Antigenic Studies of Oral and Nonoral Black-Pigmented Bacteroides Strains

Identifieur interne : 00D925 ( Main/Exploration ); précédent : 00D924; suivant : 00D926

Antigenic Studies of Oral and Nonoral Black-Pigmented Bacteroides Strains

Auteurs : Michael J. Reed ; J Rgen Slots ; Christian Mouton ; Robert J. Genco

Source :

RBID : PMC:551156

Abstract

Antigens of several oral and nonoral strains of Bacteroides asaccharolyticus (proposed classification of oral B. asaccharolyticus, Bacteroides gingivalis), Bacteroides melaninogenicus subsp. intermedius, B. melaninogenicus subsp. melaninogenicus, and B. melaninogenicus subsp. levii were identified in soluble preparations obtained by sonication, autoclaving, and NaOH treatment of whole bacterial cells. The sonicate preparations contained the most complete representation of soluble antigens using antisera to the whole organism in gel precipitation tests. Among strains of B. melaninogenicus subsp. intermedius many common antigens were detected, and no consistent antigenic differences were seen between strains from oral and nonoral sites. None of the antigens of B. melaninogenicus subsp. intermedius reacted with sera raised to several strains of oral or nonoral B. asaccharolyticus, nor did antigens prepared from the latter strains react with antisera to B. melaninogenicus subsp. intermedius. At least one common antigen was shared by strains of B. melaninogenicus subsp. intermedius and strains of B. melaninogenicus subsp. melaninogenicus; however, subspecies-specific antigens were also found. Antigens from and antisera to oral and nonoral strains of B. asaccharolyticus did not react with sera to and antigens from B. melaninogenicus subsp. melaninogenicus. Strains of B. asaccharolyticus isolated from the oral cavity were antigenically distinct from strains of B. asaccharolyticus obtained from nonoral sites and lesions. This lack of cross-reactivity between the oral and nonoral strains of B. asaccharolyticus together with recent findings of marked genetic differences between oral and nonoral strains of B. asaccharolyticus suggest that these groups of organisms may represent different species.

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Url:
PubMed: 7216426
PubMed Central: 551156


Affiliations:

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<p>Antigens of several oral and nonoral strains of
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, and
<italic>B. melaninogenicus</italic>
subsp.
<italic>levii</italic>
were identified in soluble preparations obtained by sonication, autoclaving, and NaOH treatment of whole bacterial cells. The sonicate preparations contained the most complete representation of soluble antigens using antisera to the whole organism in gel precipitation tests. Among strains of
<italic>B. melaninogenicus</italic>
subsp.
<italic>intermedius</italic>
many common antigens were detected, and no consistent antigenic differences were seen between strains from oral and nonoral sites. None of the antigens of
<italic>B. melaninogenicus</italic>
subsp.
<italic>intermedius</italic>
reacted with sera raised to several strains of oral or nonoral
<italic>B. asaccharolyticus</italic>
, nor did antigens prepared from the latter strains react with antisera to
<italic>B. melaninogenicus</italic>
subsp.
<italic>intermedius.</italic>
At least one common antigen was shared by strains of
<italic>B. melaninogenicus</italic>
subsp.
<italic>intermedius</italic>
and strains of
<italic>B. melaninogenicus</italic>
subsp.
<italic>melaninogenicus</italic>
; however, subspecies-specific antigens were also found. Antigens from and antisera to oral and nonoral strains of
<italic>B. asaccharolyticus</italic>
did not react with sera to and antigens from
<italic>B. melaninogenicus</italic>
subsp.
<italic>melaninogenicus.</italic>
Strains of
<italic>B. asaccharolyticus</italic>
isolated from the oral cavity were antigenically distinct from strains of
<italic>B. asaccharolyticus</italic>
obtained from nonoral sites and lesions. This lack of cross-reactivity between the oral and nonoral strains of
<italic>B. asaccharolyticus</italic>
together with recent findings of marked genetic differences between oral and nonoral strains of
<italic>B. asaccharolyticus</italic>
suggest that these groups of organisms may represent different species.</p>
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