Microbiologic profile of endodontic infections from HIV− and HIV+ patients using Multiple-Displacement Amplification and Checkerboard DNA-DNA Hybridization

• Published in: Oral diseases Vol. 18; no. 6; pp. 558 - 567
• Main Authors: Brito, LCN, Sobrinho, AP Ribeiro, Teles, RP, Socransky, SS, Haffajee, AD, Vieira, LQ, Teles, FRF
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.09.2012; Wiley Subscription Services, Inc
• Subjects: Actinomyces - isolation & purification; Actinomyces meyeri; Adolescent; Adult; Bacteria - classification; Bacteriology; Bacteroides fragilis; Bacteroides fragilis - isolation & purification; Candida albicans - isolation & purification; checkerboard; Child; Corynebacterium; Corynebacterium diphtheriae; Corynebacterium diphtheriae - isolation & purification; Dental pulp; Dental Pulp Cavity - microbiology; Dental Pulp Necrosis - microbiology; Deoxyribonucleic acid; Diphtheria; DNA; DNA Probes; endodontic infections; Female; Gram-Negative Anaerobic Straight, Curved, and Helical Rods - classification; Helicobacter pylori; HIV Seronegativity; HIV Seropositivity - microbiology; HIV-positive patients; Human immunodeficiency virus; Humans; Infection; Male; MDA; Middle Aged; Nucleic Acid Amplification Techniques; Nucleic Acid Hybridization - methods; Pathogens; Peptostreptococcus - isolation & purification; Porphyromonas gingivalis; Porphyromonas gingivalis - isolation & purification; Prevotella; Prevotella - classification; Prevotella nigrescens; Prevotella nigrescens - isolation & purification; root canals; Stenotrophomonas maltophilia; Stenotrophomonas maltophilia - isolation & purification; Streptococcus sobrinus; Streptococcus sobrinus - isolation & purification; Teeth; Veillonella - isolation & purification; Young Adult
• ISSN: 1354-523X; 1601-0825; 1601-0825
• DOI: 10.1111/j.1601-0825.2012.01908.x

Oral Diseases (2012) 18, 558–567 Objective:  To compare the microbiota of endodontic infections in necrotic pulp from HIV‐negative and HIV‐positive subjects. Materials and Methods:  Root canal samples from necrotic pulp were collected from 40 HIV− and 20 HIV+ subjects. Pulps were amplified using multiple displacement amplification (MDA). Then, checkerboard DNA–DNA hybridization was employed to assess the levels of 107 microbial taxa. The percentage of DNA probe count and the percentage of teeth colonized by each test species were investigated. Significant differences between groups regarding proportions of taxa and prevalence of the test species were sought using the Mann–Whitney test and the Chi‐square analysis, respectively. Results:  The most prevalent taxa detected were Dialister pneumosintes, Stenotrophomonas maltophilia, Streptococcus sobrinus, Corynebacterium diphteriae, and Helicobacter pylori among HIV‐ subjects and D. pneumosintes, Prevotella tannerae, Porphyromonas gingivalis, Parvimonas micra, Prevotella nigrescens, and Corynebacterium diphtheriae among HIV+ individuals. D. pneumosintes, C. diphtheria, and C. albicans were the most abundant species in the HIV‐ group, whereas the predominant taxa in HIV+ samples were P. tannerae, D. pneumosintes and Olsenella uli. P. tannerae, O. uli, Veilonella dispar, Bacteroides fragilis, and Actinomyces meyeri were significantly more abundant in HIV+ samples. Conclusions:  There were significant differences in the prevalence and proportions of specific microbial taxa between HIV− and HIV+ individuals. The root canal microbiota may represent a reservoir of important oral and medical pathogens, mainly in HIV+ individuals.