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Lemierre syndrome: postanginal sepsis.

BACKGROUND: Lemierre syndrome, or postanginal sepsis, was first described in the early part of this century and is characterized by pharyngitis, followed by high fever and rigors, cervical adenopathy, thrombophlebitis of the internal jugular vein, distant abscess formation, and icterus, associated with isolation of Fusobacterium necrophorum from blood. METHODS: This report describes a case of postanginal sepsis and reviews the medical literature on postanginal sepsis obtained through the MEDLINE data base using Fusobacterium as the key search word. RESULTS: The features of Lemierre syndrome have changed little since the original description, through the prognosis has improved dramatically since the development of antibiotics. Appropriate management includes prompt administration of an antibiotic with good anaerobic coverage, drainage of persistent abscesses, and continued antibiotic therapy until radiographic resolution of abscess is achieved. CONCLUSIONS: Although Lemierre syndrome is a relatively uncommon disease, the primary care physician needs to be aware of the clinical features and management to treat appropriately.

Adult↗

[Neck pyomyositis associated with polymicrobial sepsis of sinusal origin].

Spontaneous pyomyositis (primary pyomyositis) is an infrequent disease in non-tropical countries, caused by bacterial infection of skeletal muscle. Although pyomyositis is associated in many cases to septicemia, the occurrence of that disease as a secondary manifestation of bacteremia is very unusual, requiring a high-grade index of suspicion to diagnose it in the early stages. We present one case of cervical pyomyositis, caused by Fusobacterium necrophorum and group F streptococcus, during the course of a sepsis of sinusal origin, that was treated without surgical therapy. This so uncommon form of presentation of Fusobacterium septicemia, its diagnosis and treatment are discussed.

Adult↗

Unusual radiological manifestations of Lemierre's syndrome: a case report.

Lemierre's syndrome is an uncommon clinical entity characterized by oropharyngeal infection followed by septic thrombophlebitis of the jugular vein with embolization to the lungs and other organs. The organism is a gram-negative anaerobic bacterium, Fusobacterium necrophorum. We report a case of Lemierre's syndrome in an 8-year-old child who presented with septic arthritis of the left hip joint. Roentgenograms and computed tomography demonstrated gas in the joint and adjacent soft tissues, along with a dislocated hip. Sonography of the neck coupled with the colour Doppler technique did not reveal any abnormality in the jugular veins. A blood culture grew Fusobacterium necrophorum, confirming the diagnosis of Lemierre's syndrome.

Arthritis, Infectious↗

Anaerobic bacteremia in children.

Twenty-nine anaerobic isolates were recovered from 28 pediatric patients with anaerobic bacteremia: 14 Bacteroides sp (11 in the B fragilis group); four anaerobic Gram-positive cocci; four Clostridium sp; four Propionibacterium acnes; and three Fusobacterium sp. No aerobic bacteria were isolated from these patients. The gastrointestinal tract was the possible portal of entry in 13 instances, eight of which were due to Bacteroides organisms, four to Clostridium sp, and one to F nucleatum. The ear, sinus, and oropharynx were probable portals of entry in seven instances, four of which were due to Peptococcus sp and two to Fusobacterium sp. Five patients (18%) died; four had bacteremia caused by B fragilis group, and one had bacteremia caused by P acnes. The average duration of antimicrobial therapy was 20 days (range, seven to 72 days). The early recognition and rapid institution of appropriate antimicrobial and surgical therapy are of utmost importance in improving the outcome of these patients.

Adolescent↗

Capnocytophaga: new genus of gram-negative gliding bacteria. III. Physiological characterization.

Sixty-eight strains of capnophilic fusiform Gram-negative rods from the human oral cavity were subjected to extensive physiologic characterization, tested for susceptibility to various antibiotics, and the mol-percent guanine plus cytosine of each isolate determined. The characteristics of the isolates were compared with 10 fresh and 2 stock isolates of Fusobacterium nucleatum. The isolates clearly differed from the Fusobacterium species on the basis of mol-percent guanine plus cytosine, end products, growth in a capnophilic environment and fermentation of carbohydrates. All of the gliding isolates required CO2 and formed acetate and succinate, but not H2S, indole or acetylmethylcarbinol. All fermented glucose, sucrose, maltose and mannose. The organisms may be differentiated on the basis of fermentation of additional carbohydrates, hydrolysis of polymers and reduction nitrate. Three species are proposed: Capnocytophaga ochracea, Capnocytophaga sputigena and Capnocytophaga gingivalis. Ten isolates did not fit into the proposed species.

Adult↗

Effect of beta-lactamase inhibitors on beta-lactamases from anaerobic bacteria.

Three beta-lactamase inhibitors in clinical use--clavulanic acid, sulbactam and tazobactam--were investigated for their activity on beta-lactamases from Bacteroides uniformis, Clostridium butyricum and Fusobacterium nucleatum. Purification of the beta-lactamases was carried out by anion-exchange chromatography, gel filtration and FPLC. The inactivation of beta-lactamase activity was determined spectrophotometrically with nitrocefin as substrate. Various concentrations of the inhibitors were preincubated at 30 degrees C together with the enzyme for different periods of time before determination of the beta-lactamase activity. The three beta-lactamases tested were more susceptible to tazobactam than to clavulanic acid and sulbactam. Clavulanic acid and sulbactam reduced the enzyme activity of the Bacteroides uniformis beta-lactamase more effectively than the Clostridium butyricum and Fusobacterium nucleatum beta-lactamases.

Bacteria, Anaerobic↗

Interleukin-1 and interleukin-1 inhibitor production by human adherent cells stimulated with periodontopathic bacteria.

This study examined the effect of the putative periodontopathic bacteria Bacteroides gingivalis and Fusobacterium nucleatum on the production of interleukin-1 (IL-1) and IL-1 inhibitors by human plastic-adherent mononuclear cells from normal donors. Fusobacterium mortiferum was used as a non-oral, non-pathogenic control organism. Unstimulated adherent cells spontaneously secreted an IL-1 inhibitor, whereas stimulation with B. gingivalis induced the synthesis and secretion of IL-1. With both fusobacteria IL-1 was present in the intracellular environment, whereas the predominant secretory product was either IL-1 or an IL-1 inhibitor. These results suggest that bacteria are capable of modulating cytokine production by monocytes and may thereby alter the local immune response.

Adult↗

Summer mastitis in heifers: a bacteriological examination of secretions from clinical cases of summer mastitis in Denmark.

A total of 166 samples of secretions collected from Danish heifers suffering from clinically diagnosed summer mastitis were examined bacteriologically. One hundred and sixty three samples yielded positive findings whereas no growth was obtained from 3 specimens. The majority of samples revealed a mixed flora in which the predominant components were Actinomyces pyogenes, Peptostreptococcus indolicus, a microaerophilic coccus (Stuart-Schwan coccus), Fusobacterium necrophorum, Bacteriodes melaninogenicus and Streptococcus dysgalactiae. Pure cultures were recovered in only 7% of cases. P. indolicus was isolated from 875 of the cases, a microaerophilic coccus from 84%, A. pyogenes from 72%, Fusobacterium necrophorum from 52%, Str. dysgalactiae from 37%, B. melaninogenicus from 33% and various unidentified obligate anaerobic Gram-negative rods from 31%. The results confirm the complex bacterial aetiology of summer mastitis.

Actinomyces↗

Antibacterial effects of some root end filling materials.

In addition to having good sealing ability, root end filling materials should "ideally" have some antibacterial activity to prevent bacterial growth. This investigation compared the antibacterial effects of amalgam, zinc oxide-eugenol, Super EBA and a mineral trioxide aggregate on nine facultative bacteria Streptococcus fecalis, Streptococcus mitis, Streptococcus mutans, Streptococcus salivarius, Lactobacillus species, Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis, and Escherichia coli B and seven strict anaerobic bacteria, Prevotella (Bacteroides) buccae, Bacteroides fragilis, Prevotella (Bacteroides) intermedia, Prevotella (Bacteroides) melaninogenica, Fusobacterium necrophorum, Fusobacterium nucleatum, and Peptostreptococcus anaerobius. After growing these bacteria on solid media, freshly mixed and 24-h set test materials were placed on the surface of these inoculated media and incubated in the appropriate atmosphere for 24 to 48 h at 37 degrees C. Impregnated discs with the Super EBA liquid were used as positive controls. The antibacterial effects of each material were measured in millimeters and the data were analyzed using one-way and two-way analysis of variance and Scheffé tests to determine the statistical differences between the antibacterial effects of the test materials. Impregnated discs with Super EBA liquid caused varying degrees of growth inhibition for both facultative and strict anaerobic bacteria. Both types of amalgam had no antibacterial effect against any of the bacteria tested in this study. Mineral trioxide aggregate had an antibacterial effect on some of the facultative bacteria and no effect on any of the strict anaerobic bacteria. Zinc oxide-eugenol and Super EBA pastes had some antibacterial effects on both types of bacteria tested.(ABSTRACT TRUNCATED AT 250 WORDS)

Aluminum Compounds↗

Incidence of beta-lactamase production and antimicrobial susceptibility of anaerobic gram-negative rods isolated from pus specimens of orofacial odontogenic infections.

The incidence of beta-lactamase production in anaerobic gram-negative rods isolated from 93 pus specimens of orofacial odontogenic infections and the antimicrobial susceptibility of these isolates against 11 antibiotics were determined. A total of 191 anaerobic gram-negative rods were isolated from the specimens. Beta-lactamase was detected in 35.6% of the black-pigmented Prevotella and 31.9% of the nonpigmented Prevotella. However, no strains among the other species isolated produced beta-lactamase. Ampicillin, cefazolin and cefotaxime showed decreased activity as regards beta-lactamase-positive Prevotella strains, whereas the activity of ampicillin/sulbactam, cefmetazole, and imipenem continued to be effective against such strains. All tested beta-lactam antibiotics were effective against Porphyromonas and Fusobacterium. Erythromycin showed decreased activity against nonpigmented Prevotella and Fusobacterium. Clindamycin, minocycline and metronidazole were powerful antibiotics against which anaerobic gram-negative rods could be tested. The present study showed that beta-lactamase-positive strains were found more frequently in the Prevotella strains than in any of the other species of anaerobic gram-negative rods. The effectiveness of adding sulbactam to ampicillin was demonstrated, as well as the difference in cephalosporin activity against beta-lactamase-positive strains.

Adolescent↗

Sequence conservation and distribution of the fusobacterial immunosuppressive protein gene, fipA.

Fusobacterium nucleatum is a gram-negative anaerobe involved in various diseases, including periodontitis. Recently, other investigators isolated the F. nucleatum FDC 364 fusobacterial immunosuppressive protein (FIP). One subunit, FipA, impairs T-cell activation in vitro and shows homology with beta-ketothiolases. However, its distribution and variability among fusobacteria was not reported. Cloned fipA gene sequences from F. nucleatum ssp. polymorphum (ATCC 10953) and F. nucleatum ssp. nucleatum (ATCC 23726) shared 89 and 92% identity, respectively, with FDC 364 fipA, and 90 and 94% identity, respectively, with the FDC 364 FipA predicted amino acid sequence. Southern blot analyses of chromosomal DNA from fusobacterial strains, including F. nucleatum and other Fusobacterium species, were performed using partial fipA sequences as probes. The results indicate that fipA is highly conserved among the F. nucleatum strains examined and that fipA homologues are widely distributed among fusobacteria. A clear relationship between immune suppression, metabolism and the FipA protein remains to be determined.

Acetyl-CoA C-Acetyltransferase↗

The microbiota of periodontal pockets with different depths in therapy-resistant periodontitis.

This study presents the composition of the cultivable microbiota colonising periodontal pockets of different depths among 2 patient-groups classified as non-responsive (NR-group; 11 participants) or responsive (R-group; 10 participants) to periodontal treatment. Microbiological samples from three types of pocket (< 4 mm deep A-samples; 4-5 mm B-samples; > 5 mm C-samples) were analysed by cultural methods for putative periodontitis pathogens, microbial groups constituting > or = 5% of the total cultivable flora and opportunistic pathogens. Actinomyces naeslundii, A. israelii, Bacteroides forsythus, Fusobacterium spp, Porphyromonas gingivalis, Prevotella intermedia, Peptostreptococcus micros, anaerobic streptococci and facultative anaerobic streptococci were most prevalent. Actinobacillus actinomycetemcomitans, Staphylococcus aureus, enteric rods and yeasts were less prevalent. The periodontitis pathogens Bacteroides forsythus, Fusobacterium spp, Porphyromonas gingivalis, Prevotella intermedia and Peptostreptococcus micros constituted together (on average) < or = 23% of the viable counts in the A- and B-samples of both patient groups and in the C-samples of the R-group. In the C-samples of the NR-group their mean counts were 45%. Correlations were found between smoking habits and the five pathogens in the C-samples and in pooled pocket depth samples. The results show that groups of periodontopathogens should be considered a causal factor in therapy-resistant periodontitis. Further, smoking and deep pockets can enhance a shift in the balance of the subgingival microflora predisposing a site to disease and a susceptible host may be the pre-requisite to therapy-resistant periodontitis.

Actinomyces↗

Microbiological parameters associated with IL-1 gene polymorphisms in periodontitis patients.

BACKGROUND, AIMS: Polymorphisms in the cluster of IL-1 genes have been significantly associated with the severity of adult periodontitis. The purpose of this study was to compare microbiological parameters in IL-1 genotype negative and positive adult subjects with a range of periodontitis severities. METHOD: The study included 108 subjects in good general health. Clinical parameters were recorded at 6 sites/tooth excluding 3rd molars and included: plaque accumulation, gingival erythema, bleeding on probing, suppuration, pocket depth and attachment level. Subgingival plaque samples were collected from the mesiobuccal surface of up to 28 teeth in each subject (mean 25.3) providing a total of 2736 samples. The levels of 40 subgingival taxa were determined in each sample using checkerboard DNA-DNA hybridization. Fingerstick blood samples were collected for IL-1A (+4845) and IL-1B (+3954) genotyping using PCR-based methods. RESULTS: The proportion of IL-1 genotype positive subjects that exhibited mean counts of specific subgingival species above selected thresholds was significantly higher than the proportion of genotype negative subjects. Prominent among species that were detected at higher levels in genotype positive subjects were members of the "red" and "orange" complexes and included: Bacteroides forsythus, Treponema denticola, the Fusobacterium nucleatum subspecies, Fusobacterium periodonticum, Campylobacter gracilis, Campylobacter showae and Streptococcus constellatus. Streptococcus intermedius, Streptococcus gordonii and 3 Capnocytophaga species were also detected more frequently at high numbers in genotype positive subjects. Significantly higher mean counts of B. forsythus, Porphyromonas gingivalis, T. denticola, the F. nucleatum subspecies, F. periodonticum, Campylobacter rectus, C. showae, Eubacterium nodatum, S. constellatus, S. gordonii, and S. intermedius were detected at periodontal pockets >6 mm in subjects who were genotype positive when compared with genotype negative subjects. The increase was due to increased numbers of cells of these species rather than a major shift in proportion. CONCLUSION: The data suggest that genotype positive subjects more frequently had higher levels of "red" and "orange" complex species that are known to be strongly associated with measures of periodontal inflammation.

Adult↗

Assessment of periradicular microbiota by DNA-DNA hybridization.

In the present study the "checkerboard" DNA-DNA hybridization technique was used to identify bacteria in periapical endodontic lesions of asymptomatic teeth. Thirty-four patients with root-filled teeth and apical periodontitis were divided into two groups, each containing 17 patients. In Group 1, a marginal incision was performed during surgery to expose the lesion, and in Group 2, a submarginal incision was applied. The gingiva and mucosa were swabbed with an 0.2% chlorhexidine gluconate solution prior to surgery. Bacterial DNA was identified in all samples from the two groups using 40 different whole genomic probes. The mean number (+/- SD) of species detected was 33.7 +/- 3.3 in Group 1 and 21.3 +/- 6.3 in Group 2 (P < 0.001). The majority of the probe-detected bacteria were present in more lesions from Group 1 than from Group 2. The differences were most notable for Campylobacter gracilis, Porphyromonas endodontalis, Propionibacterium acnes, Capnocytophaga gingivalis, Fusobacterium nucleatum ssp. nucleatum, Fusobacterium nucleatum ssp. polymorphum, Prevotella intermedia, Treponema denticola, Streptococcus constellatus and Actinomyces naeslundii I. Bacterial species such as Actinobacillus actinomycetemcomitans and Bacteroides forsythus were detected in more than 60% of the lesions from both groups. Also, P. endodontalis was abundant in periapical tissue. The data supported the idea that following a marginal incision, bacteria from the periodontal pocket might reach the underlying tissues by surgeon-released bacteremia. The study provided solid evidence that bacteria invade the periapical tissue of asymptomatic teeth with apical periodontitis. The detection of much more bacteria with the "checkerboard" DNA-DNA hybridization method than has previously been recovered by anaerobic culture indicated that the endodontic (and periodontal) microfloras should be redefined using molecular methods.

Actinomyces↗

Microbiology of infected poison ivy dermatitis.

We report the aerobic and anaerobic microbiology of secondarily infected poison ivy dermatitis. The study involved retrospective review of clinical and microbiology laboratory records of patients with secondarily infected poison ivy lesions. Bacterial growth was noted in 33 specimens. Aerobic or facultative anaerobic bacteria only were present in 18 (55%) patients, anaerobic bacteria only in seven (21%), and mixed anaerobic-aerobic bacteria in eight (24%). Forty-five isolates were recovered (1.4 per specimen): 27 aerobic or facultative anaerobic bacteria, and 18 strict anaerobes. The predominant aerobic and facultative anaerobic bacteria were Staphylococcus aureus (13 isolates) and group A beta-haemolytic streptococci (six). The predominant anaerobes were Peptostreptococcus spp. (seven isolates), pigmented Prevotella and Porphyromonas spp. (four) and Fusobacterium spp. (two). Single bacterial isolates were recovered in 18 (55%) patients, eight of which were S. aureus. Nineteen of the organisms isolated from 16 (48%) patients produced the enzyme beta-lactamase. Organisms that resided in the mucous membranes close to the lesions predominated in those infections. Enteric gram-negative rods and Bacteroides fragilis group predominated in leg and buttock lesions. Group A beta-haemolytic streptococci, pigmented Prevotella and Porphyromonas and Fusobacterium spp. were most frequently recovered from lesions of the finger, face and neck. The polymicrobial aetiology of secondarily infected poison ivy lesions, and the association of bacterial flora with the anatomical site of the lesions, are demonstrated.

Bacterial Infections↗

Bacteriologic findings in peritonsillar abscesses in young adults.

Aspirated pus samples from 124 patients with peritonsillar abscess were cultured quantitatively for aerobes and anaerobes. A total of 98% of the samples yielded bacteria. Of the 550 isolates obtained (mean, 4.4 per patient), 143 were aerobes (representing 16 species or groups) and 407 were anaerobes (representing 40 species or groups). Aerobes were isolated from 86% of patients-alone in 20 cases and together with anaerobes in 87. The most common aerobic isolates were Streptococcus pyogenes (isolated from 45% of patients), Streptococcus milleri group organisms (27%), Haemophilus influenzae (11%), and viridans streptococci (11%). Anaerobes were isolated from 82% of the samples and as a sole finding from 15 abscesses. Fusobacterium necrophorum and Prevotella melaninogenica were both isolated from 38% of patients, Prevotella intermedia from 32%, Peptostreptococcus micros from 27%, Fusobacterium nucleatum from 26%, and Actinomyces odontolyticus from 23%. The rate of previous tonsillar/peritonsillar infections was lowest (25%) among patients infected with S. pyogenes and highest (52%) among those infected with F. necrophorum (P < .01). Recurrences and/or related tonsillectomies were more common among patients infected with F. necrophorum than among those infected with S. pyogenes (57% vs. 19%; P < .0001) or with S. milleri group organisms (43% vs. 19%; P < .05). beta-Lactamase was produced by only 38% of the 73 isolates of Prevotella species tested; however, 56% of the 36 patients studied harbored one or more such strains.

Adolescent↗

Role of anaerobic bacteria in bite-wound infections.

The etiologic agents usually involved in wound infections due to human or animal bites are the aerobic skin flora of the victim, e.g., Staphylococcus aureus, and/or the aerobic oral flora of the biter, e.g., Pasteurella multocida. While anaerobic bacteria are predominant in the normal oral flora of humans and animals, their importance in the pathogenesis of bite-wound infections has not been stressed. Most investigators in this field have either not cultured these wounds for anaerobic bacteria or not utilized optimal culture techniques. In a series of studies on human and animal bite wounds, methods that are optimal for recovery of anaerobic bacteria were used. Anaerobes were found in significant quantities in 39% of animal bite wounds, 50% of human bite wounds, and 56% of clenched-fist injuries. Several species of anaerobes usually were present in the wounds and always were present in mixed culture with aerobic oral flora. The anaerobes most commonly isolated included Bacteroides asaccharolyticus, Bacteroides bivius, Bacteroides disiens, Bacteroides melaninogenicus, Bacteroides oralis, Bacteroides ruminicola, Bacteroides pneumosintes, Bacteroides ureolyticus, Fusobacterium nucleatum, Fusobacterium russii, Peptococcus species, Peptostreptococcus species, and Veillonella species. Initial, empiric antimicrobial therapy for bite wounds should be directed against potential anaerobic as well as aerobic pathogens.

Animals↗