Anaerobic bacteria in dentoalveolar infections.
ABSTRACT The bacteriology of 57 dentoalveolar infections was studied using optimal techniques to collect, transport and process specimens. There was an average of 4 bacterial species per specimen, and only 1/3 of the specimens held aerobes. Among the aerobic bacteria, streptococci dominated and among the anaerobes the Gram-negative rods, Bacteroides ruminicola and Fusobacterium nucleatum, were most frequently isolated followed by Gram-positive cocci, in particular Streptococcus intermedius. All aerobic isolates were resistant to penicillins but sensitive to clindamycin and tinidazole. The other anaerobic isolates were sensitive to penicillins but showed varying susceptibility to erythromycin and doxycycline. Tinidazole was effective against all anaerobic Gram-negative rods. The presence of volatile fatty acids in pus from dentoalveolar infections was found to be of presumptive value for the diagnosis of anaerobic infections. Direct gas-liquid chromatographic analysis of pus is recommended as a routine procedure for preliminary diagnosis of anaerobic dentoalveolar infections.
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ABSTRACT: Purpose: To detect predominant bacteria associated with radicular cysts and discuss in light of the literature. Clinical materials were obtained from 35 radicular cysts by aspiration. Cultures were made from clinical materials by modern laboratory techniques, they underwent microbiologic analysis. The following are microorganisms isolated from cultures: Streptococcus milleri Group (SMG) (23.8%) [Streptococcus constellatus (19.1%) and Streptococcus anginosus (4.7%)], Streptococcus sanguis (14.3%), Streptococcus mitis (4.7%), Streptococcus cremoris (4.7%), Peptostreptococcus pevotii (4.7%), Prevotella buccae (4.7%), Prevotella intermedia (4.7%), Actinomyces meyeri (4.7%), Actinomyces viscosus (4.7%), Propionibacterium propionicum (4.7%), Bacteroides capillosus (4.7%), Staphylococcus hominis (4.7%), Rothia denticariosa (4.7%), Gemella haemolysans (4.7%), and Fusobacterium nucleatum (4.7%). Results of this study demonstrated that radicular cysts show a great variety of anaerobic and facultative anaerobic bacterial flora. It was observed that all isolated microorganisms were the types commonly found in oral flora. Although no specific microorganism was found, Streptococcus spp. bacteria (47.5%) -- especially SMG (23.8%) -- were predominantly found in the microorganisms isolated. Furthermore, radicular cysts might be polymicrobial originated. Although radicular cyst is an inflammatory cyst, some radicular cyst fluids might be sterile.Head & Face Medicine 09/2013; 9(1):25. · 0.98 Impact Factor
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ABSTRACT: This paper aim to assess the anatomical spaces of head and neck region and causative microorganisms responsible for infections, evaluate the resistance of antibiotics used in treatment and compare the findings with previously reported microbial flora in the orofacial infection. Forty-two patients were recorded. All underwent surgical incision and drainage, received antibiotics cover, and had culture and sensitivity test performed for gram positive and gram negative aerobes. There were 33 male (78.57 %) and 9 female (21.42 %). Out of the 42 patients 28 (66.66 %) presented with single space involvement. The submandibular space was the most frequent location for single space abscess (28.12 %). Fourteen patients presented with multiple space involvement, with a total of 64 spaces being involved. Forty microorganisms were isolated. There were 28 aerobes and 10 anaerobes. Two fungi were also identified. The most common bacteria isolated were Staphylococcus aureus, Klebsiella, Escherichia coli, Peptostreptococcus. The key issue here, which needs to be remembered, is that antibiotics alone cannot resolve odontogenic infection satisfactorily. Quick recovery of patients results with proper basic management comprising of early drainage/decompression which is equally important.Journal of Maxillofacial and Oral Surgery 03/2014;
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ABSTRACT: Dental infection has plagued humankind for as long as our civilization has been a fight against microorganisms by man dates back to ancient civilization. The discoveries of antibiotics are encouraging trends towards conquest of the microbial infection. This study emphasizes the detection of pathogenic microorganisms by microbiological examination and culture of specimens representative of the infection, importance of early and correct diagnosis of infections, prompt treatment and supportive care. The age group most commonly involved was in the third and fourth decades of life. Extraction followed by incision and drainage was done. The most commonly involved space was submandibular followed by buccal space. Thirty isolates were obtained. 43 % of the strains were strict anaerobes and 39 % were aerobes, with mixed growth was seen in 18.52 %. Amongst aerobes alpha hemolytic Streptococcus aureus and Peptostreptococcus as anaerobes were the most predominant followed by Bacteroides and Prevotella. Mixed aerobic and anaerobic isolates were obtained from 18.52 % of total cases. Overall resistance to Penicillin was 22 %, amongst aerobes. Amoxicillin and Clavulanic acid combination performed better, as 100 % strains were sensitive to it. The results of this study saw a changing trend in terms of predominance of anaerobic bacteria over aerobic ones.Journal of Maxillofacial and Oral Surgery 06/2014; 13(2):133-9.