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Biomedical subjects

G Riddle

Publications and source records attributed to G Riddle.

10 recordsLinked to original sources
PubMed1991

Effectiveness of ofloxacin in the treatment of Chlamydia trachomatis and Neisseria gonorrhoeae cervical infection.

Forty patients with cervical infection caused by Chlamydia trachomatis were treated with ofloxacin (20) or doxycycline (20). Ofloxacin was successful in eradicating C. trachomatis from all 20 (100%) patients. Doxycycline was effective in 18 of 20 (90%) patients. Three patients had a concomitant cervical gonococcal infection. All three were successfully treated: one with ofloxacin and two with doxycycline. Ofloxacin, 300 mg, taken twice daily for 7 days, is effective in eradicating endocervical C. trachomatis infection.

Adolescent↗
PubMed1991

Susceptibility of female pelvic pathogens to oral antibiotic agents in patients who develop postpartum endometritis.

Fifteen hundred patients were enrolled in a prospective, randomized study on the effect of antibiotic prophylaxis during cesarean section. Two hundred thirty-one patients developed postpartum endometritis, and the isolates obtained from the endometrium were tested for sensitivity to ampicillin, cefuroxime, ofloxacin, ciprofloxacin, and clindamycin. Minimum inhibitory concentrations of 50% and 90% of ampicillin, cefuroxime, and clindamycin were similar to previously reported values; however, slight differences were noted in the activity of the two quinolones to common pelvic isolates. The minimum inhibitory concentrations of 90% of ofloxacin and ciprofloxacin to 119 isolates of Enterococcus faecalis were 4.0 and 2.0, to 17 isolates of Staphylococcus aureus 1.0 and 0.5, to 39 isolates of Escherichia coli 0.5 and 1.0, to 46 isolates of Bacteroides bivius 4.0 and 8.0, to 57 isolates of Gardnerella vaginalis 1.0 and 2.0, to 71 isolates of Staphylococcus epidermidis 0.5 and 0.5, to 16 isolates of Proteus mirabilis 0.25 and 0.12, and to 50 isolates of Lactobacillus species 32.0 and 8.0 micrograms/ml, respectively. In summary, the quinolones have activity comparable with a variety of other oral agents versus female pelvic pathogens, with the quinolones ofloxacin and ciprofloxacin having better activity against most of the gram-negative isolates. Anaerobic activities were comparable with the beta-lactams, but inferior to clindamycin and metronidazole as expected.

Administration, Oral↗
PubMed1991

Role of Neisseria gonorrhoeae and Chlamydia trachomatis in intraabdominal abscess formation in the rat.

Our concept of the pathogenesis of acute salpingitis and advanced pelvic infection, such as tuboovarian abscess, is evolving. Although Neisseria gonorrhoeae and Chlamydia trachomatis are thought to play a significant role in acute pelvic inflammatory disease, other microorganisms, such as aerobes and anaerobes, have repeatedly been reported to play a significant role, also, particularly in the patient with advanced disease. A study was designed to evaluate the pathogenesis, and particularly any synergistic role, of some aerobes and anaerobes with N gonorrhoeae and C trachomatis abscess formation. Using the rat model developed by Weinstein and Onderdonk, the study demonstrated that N gonorrhoeae and C trachomatis alone do not produce abscesses. However, when combined with facultative or anaerobic bacteria, synergism with abscess formation is noted frequently. The data support the hypothesis that N gonorrhoeae and C trachomatis initiate infection and that aerobic and anaerobic bacteria act synergistically to produce abscesses. In addition, microorganisms not inoculated were found to be recruited into the infectious process. The organisms may gain access to the peritoneal cavity via the lower genital tract or from transmucosal migration from the intestinal flora.

Abscess↗
PubMed1990

Antibiotic prophylaxis: is there a difference?

Seven antibiotics, administered in 10 different regimens for prophylaxis, were randomly assigned to 1580 patients who were delivered by cesarean section. Cefazolin 1 gm, administered for three doses, served as the control group. Cefazolin 1 gm, cefazolin 2 gm, cefoxitin 1 gm, cefoxitin 2 gm, cefonicid 1 gm, cefotetan 1 gm, ceftizoxime 1 gm, ampicillin 2 gm, and piperacillin 4 gm were all administered in a single dose. Four antibiotics proved to be superior in preventing postpartum endometritis: ampicillin 2 gm (p = 0.03), cefazolin 2 gm (p = 0.005), piperacillin 4 gm (p = 0.0007), and cefotetan 1 gm (p = 0.0001). Single-dose cephalosporin antibiotic prophylaxis was found to result in approximately a twofold increase in Enterococcus faecalis colonization of the vagina (p less than 0.01). This may be significant in patients in whom postpartum endometritis develops and who have failure of initial treatment with a broad-spectrum cephalosporin, e.g., cefoxitin or cefotetan, or a combination such as clindamycin or metronidazole plus an aminoglycoside. Rupture of amniotic membranes for a half hour or more was associated with an increased risk for postpartum endometritis. The use of internal fetal monitoring was associated with an increased risk of soft tissue pelvic infection.

Adolescent↗
PubMed1990

Ampicillin/sulbactam versus clindamycin in the treatment of postpartum endomyometritis.

Sixty-eight patients with postpartum endomyometritis were enrolled in this open randomized comparative study. Forty-two patients received ampicillin/sulbactam and 26 received clindamycin. The cure rates were similar in the two groups: 83% in the ampicillin/sulbactam group and 88% in the clindamycin group. The most frequent endometrial bacterial isolates were Bacteroides bivius, Streptococcus faecalis, Escherichia coli, and Ureaplasma urealyticum. Bacteremia was present in 15 of 68 (22%), the most frequent isolates being Mycoplasma (four cases) and B bivius (three cases). Clindamycin-resistant species were S faecalis, E coli, and Proteus mirabilis. There were seven treatment failures in the ampicillin/sulbactam group; only one isolate (an E coli) was resistant to ampicillin/sulbactam. In a significant number of these failures, Mycoplasma was isolated. Ampicillin/sulbactam and clindamycin were found to be equally efficacious in the treatment of postpartum endometritis.

Adult↗
PubMed1989

Ticarcillin/clavulanic acid versus clindamycin and gentamicin in the treatment of post-cesarean endometritis following antibiotic prophylaxis.

One hundred fifty-two women who received cefazolin prophylaxis and subsequently developed postpartum endometritis were randomized to treatment with either ticarcillin/clavulanic acid (75) or clindamycin-gentamicin (77). Bacteria isolated from the endometrium were predominantly facultative anaerobic bacteria. The ratio of facultative anaerobes to obligate anaerobes was 3:1. Nineteen percent of the women were bacteremic, with mycoplasma the organism most frequently isolated from venous blood specimens. Cure rates were similar for both groups: ticarcillin/clavulanic acid 85% and clindamycin-gentamicin 81%. The advantages of ticarcillin/clavulanic acid are an increased spectrum of activity against beta-lactamase-producing bacteria, less toxicity, and lower cost.

Adult↗
PubMed1988

Ticarcillin disodium/clavulanate potassium versus clindamycin/gentamicin in the treatment of postpartum endometritis.

Ticarcillin disodium/clavulanate potassium was compared to clindamycin/gentamicin in the treatment of post-cesarean-section endometritis in 133 evaluable patients. All patients received three 1-g doses of cefazolin for prophylaxis. There was no statistically significant difference in the cure rates between the ticarcillin disodium/clavulanate potassium group (84%) and the clindamycin/gentamicin group (81%). Bacteremia occurred in 21% of the patients, with Mycoplasma the most frequent isolate. Ticarcillin disodium/clavulanate potassium was found to be as efficacious as clindamycin/gentamicin in the treatment of postpartum endometritis.

Cefazolin↗
PubMed1979

Management of a complex diving accident.

After the accidental ascent of a diving bell from 80 m, one diver died from pulmonary barotrauma and the other-though grossly ill-survived. After recompression therapy, this diver was tetraplegic with evidence of patchy microcirculatory damage of brain, cord, liver, kidneys, and gut. All systems eventually returned to normal, except the spinal cord, mainly because of the post-recompression phase of management, in which pharmacological doses of steroids, hyperbaric oxygen, and dextran were used. Although function returned in the upper limbs, the diver remained paraplegic.

Accidents↗
PubMedDate not supplied

Sulbactam/ampicillin versus metronidazole/gentamicin in the treatment of post-cesarean section endometritis.

Sixty-seven patients diagnosed with post-cesarean-section endometritis were studied in a prospective comparative randomized trial of sulbactam/ampicillin, a new beta-lactamase inhibitor drug combination, versus treatment with metronidazole/gentamicin. The success rate was 91% for each antibiotic regimen. Mycoplasma spp. or Ureaplasma spp. were isolated from all treatment failures. Endometrial cultures revealed 2.3 aerobes as well as anaerobes per patient, with Enterococcus faecalis, Bacteroides bivius, and Escherichia coli the most frequently reported bacterial isolates in 64, 40, and 28% of all patients, respectively. Positive blood cultures were noted in 11 (15%) patients with Mycoplasma sp. the most commonly found isolate (45.5%). Sulbactam/ampicillin appears to be safe and equally effective as a metronidazole/aminoglycoside drug regimen in the treatment of postpartum endometritis.

Adult↗