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Biomedical subjects

M E Ellis

Publications and source records attributed to M E Ellis.

At least 19 recordsLinked to original sources
PubMed1992

Double-blind randomized study of the effect of infusion rates on toxicity of amphotericin B.

Results of a double-blind randomized non-crossover study of rapid (45 min) versus slow (4 h) infusion of amphotericin B administered to 20 patients with proven or suspected fungal infection are reported. Toxicity was higher in the rapid infusion group than it was in the slow infusion group (mean total 7-day chill score, 173 +/- 276 versus 20 +/- 30 [P less than 0.01]; mean total 7-day dosage of meperidine required to abate rigors, 180 +/- 133 versus 58 +/- 78 mg [P less than 0.05]; and mean maximum total 7-day pulse rise, 225 +/- 64 versus 135 +/- 56 beats per min [P less than 0.02], respectively). When analyzed on a daily basis, the mean chill score, meperidine dosage, and pulse rise were also higher; and in addition, nausea and vomiting (5 of 11 patients who received a rapid infusion versus 0 of 9 patients who received a slow infusion [P less than 0.01]) appeared to be more common in those who received amphotericin B rapidly. The daily analysis approach proved that tolerance to these side effects developed with each subsequent infusion day, and by day 7 the incidence and severity were the same. This development of tolerance was significant for the mean chill score in the rapid infusion group (P less than 0.05) and for the proportion of patients with chills (P less than 0.005 for the slow infusion group; P less than 0.05 for the rapid infusion group). A decrease in creatinine clearance to greater than 51% of the baseline value was seen in two patients in each group. There were five deaths (four in the rapid infusion group, 1 in the slow infusion group) within 1 month, but none was clearly related to the amphotericin B infusion. The mean time to defervescence was similar for each group (10.8 +/- 4.1 days in the slow infusion group versus 9.9 +/- 5 days in the rapid infusion group). A rapid infusion regimen for amphotericin B cannot be recommended, at least during the first 5 to 7 days of treatment.

Adolescent↗
PubMed1992

Localized pulmonary disease due to Trichosporon beigelii.

A case of pulmonary infection caused by Trichosporon beigelii is reported. The infection occurred in a neutropenic patient with acute lymphoblastic leukemia. His chest radiograph showed a 6-cm pulmonary infiltrate in the right midzone and an apical infiltrate on the left. Repeated cultures of bronchoalveolar lavage grew budding yeast that was identified as T beigelii on the basis of morphological, cultural, and biochemical characteristics. He responded to amphotericin-B therapy. Systemic infections caused by this yeast are rare and its causal relationship in localized lung disease has been reported only seven times previously.

Adult↗
PubMed1991

Diagnostic dilemma and therapeutic non-compliance in a case of intracranial tuberculoma.

A case of extensive intracranial tuberculoma is presented. The patient had been treated for 5 years with a standard antituberculosis regimen but she had been grossly non-compliant. This had led to emergence of multi-resistant Mycobacterium tuberculosis producing progressive disease and extensive cranial nerve damage and proptosis. The unusual CT and angiographic appearances cast doubt on the original diagnosis and a brain biopsy was necessary. Mycobacterium tuberculosis resistant to isoniazid, rifampicin, ethambutol, ethionamide, pyrazinamide, clofazimine and PAS was cultured from the brain biopsy specimen and from an associated groin abscess. A novel regimen of isoniazid, cycloserine, amikacin and ciprofloxacin produced clinical improvement of symptoms and radiological resolution.

Adult↗
PubMed1991

Echinococcal disease and mycobacterial infection.

The clinical and radiological features of five patients with echinococcal disease in whom mycobacterial infection was also present are described. Three had clinically significant disease due to Mycobacterium tuberculosis (two patients) and M. fortuitum-chelonae (one patient), whilst in two others secondary infection with M. gordonae had occurred. In all cases the mycobacterium infection was found within or close to the anatomical confines of the echinococcal disease, as determined clinically, radiologically or histologically, which suggested a saprophytic-supportive role of the hydatid cyst for the mycobacterium to survive. Mycobacterial disease should be borne in mind in patients with echinococcal disease who remain unwell despite apparently effective treatment for the hydatid cyst.

Adult↗
PubMed1991

Antibacterial activity of FCE 22101 against relatively resistant blood culture isolates.

In vitro antibacterial activity of the new penem FCE 22101 was tested against blood culture isolates from 1,374 consecutive patients in a major tertiary care referral center in Saudi Arabia. Many of the isolates were significantly more resistant to commonly used beta lactams. Of the 809 members of Enterobacteriaceae tested all but 14 isolates of Enterobacter were susceptible to FCE 22101 with an MIC range of 0.12-8.0 micrograms/ml. It inhibited all the 183 isolates of Staphylococcus aureus, both methicillin-sensitive and methicillin-resistant. Ninety percent of coagulase-negative staphylococci and enterococci were susceptible to this new penem. All isolates of Acinetobacter, CDC group VE-2 and Brucella melitensis from blood were inhibited by FCE 22101. However, it was ineffective against pseudomonads. Of the nine other beta lactam drugs tested for comparison, only imipenem was found to be more inhibitory, at lower MIC values, than FCE 22101.

Anti-Bacterial Agents↗
PubMed1991

In vitro activity of lomefloxacin, a difluorinated quinolone, compared with other antimicrobials.

A total of 3,144 clinical isolates from 3,011 consecutive patients were tested against lomefloxacin by the agar dilution method. They consisted of 1,380 isolates of Enterobacteriaceae, 527 pseudomonads, 47 Haemophilus influenzae, 53 Acinetobacter, 42 Brucella melitensis, 903 staphylococci and 192 strains of enterococci. In vitro activity of lomefloxacin was compared with ciprofloxacin, norfloxacin, beta-lactams and aminoglycosides. Over 98% of Enterobacteriaceae were susceptible to lomefloxacin with an MIC of 0.06-4.0 micrograms/ml. It also inhibited 93 and 85% clinical isolates of Pseudomonas aeruginosa and Xanthomonas maltophilia, respectively. All isolates of Haemophilus, Brucella and Staphylococcus aureus were susceptible to this fluoroquinolone. However, only 43% of the 192 strains of enterococci exhibited in vitro susceptibility. Lomefloxacin was found to be comparable to ciprofloxacin and norfloxacin in its in vitro activity, and superior to most penicillins, cephalosporins and aminoglycosides against both gram-negative and gram-positive bacteria except enterococci.

4-Quinolones↗
PubMed1990

Once-weekly fluconazole to prevent recurrence of oropharyngeal candidiasis in patients with AIDS and AIDS-related complex: a double-blind placebo-controlled study.

Fluconazole 50 mg daily for 14-28 days was effective in the treatment of patients with AIDS and AIDS-related complex with severe oropharyngeal and oesophageal candidiasis. Of 24 patients entered, 17 (81%), including seven with oesophageal candidiasis, were clinically cured and two (9.5%) improved at the end of treatment. Following clinical cure, 14 patients were entered into the double-blind phase of the study, where fluconazole (150 mg) or placebo capsules were given once weekly. Treatment was double blind. Fluconazole 150 mg once weekly was found to be effective in maintaining patients both clinically and mycologically free of oropharyngeal candidiasis.

AIDS-Related Complex↗
PubMed1990

Acute gastroenteritis in infants under 6 months old.

Sixty two babies under the age of 6 months who were admitted with gastroenteritis completed a study of gradual refeeding compared with abrupt refeeding after a period of rehydration. There was no difference in the incidence of recurrence of diarrhoea due to lactose intolerance, effect on weight, or duration of hospital stay. Twenty six babies (42%) had recurrence of diarrhoea after refeeding, all of whom settled with the introduction of a lactose free soya based formula. Well nourished babies under 6 months of age with mild to moderately severe gastroenteritis can be fed immediately with full strength milk feeds after rehydration. The introduction of a lactose free soya based preparation may provide an alternative to repeated attempts at regrading with cows' milk feeds in those patients with lactose intolerance.

Acute Disease↗
PubMed1990

A review of typhoid fever in South African black children.

Typhoid fever continues to escape swift diagnosis, even in an endemic country, and its multi-system nature led to delayed diagnosis in 25% of the patients in this study. This may have been an avoidable factor, leading to death in some patients through delay in instituting appropriate antimicrobial therapy. Neurological features and diarrhoea were particularly common in this paediatric population. Relative bradycardia has been shown to be a highly statistically significant finding for our group as a whole. Amoxycillin remains an effective and useful alternative to chloramphenicol. The mortality rate of 2.5% remains unchanged over the last 10 years. The relative inaccessibility to good primary health care, acceptable water supplies and sanitation that the black South African child encounters cannot be ruled out as a co-factor.

Adolescent↗
PubMed1989

Trephine needle bone marrow biopsy in the initial staging of Hodgkin disease: sensitivity and specificity of the Ann Arbor staging procedure criteria.

The purpose of this study was to test the value of the Ann Arbor staging procedures committee criteria in defining a group of newly diagnosed patients with Hodgkin disease who do not have involvement of the bone marrow and do not need this procedure performed. One hundred sixty-six bilateral and 16 unilateral trephine bone marrow biopsies were performed in a consecutive series of 182 patients undergoing initial staging for Hodgkin disease. Bone marrow involvement was found in 13 patients. Advanced stage, defined as stage III or IV, occurring in 92%, anemia occurring in 100%, and "B" symptoms present in 100% were found to be the most sensitive indicators for bone marrow involvement. Osseous disease (99%), platelet count less than 150,000/mm3 (98%), and WBC less than 4,800/mm3 (94%) were the most specific parameters. The known association of bone marrow involvement with older patients, lymphocyte depleted histology, lower blood cell counts, anemia, advanced stage, and poorer survival is verified. The Ann Arbor staging procedures committee criteria for performing a bone marrow biopsy were shown to be 100% sensitive and 40% specific. Use of these criteria would have found all 13 patients with bone marrow involvement. Of the 73 patients who did not meet the criteria, no patient had bone marrow involvement. Use of the Ann Arbor staging procedures committee criteria is recommended.

Adult↗
PubMed1989

Cytomegalovirus cholecystitis and colitis associated with the acquired immunodeficiency syndrome.

Cytomegalovirus (CMV) is an important cause of acalculous gangrenous cholecystitis in immunocompromised persons. We report a case of acalculous acute cholecystitis and active colitis associated with CMV in a patient suffering from the acquired immune deficiency syndrome. The condition was treated successfully with surgery and 9-(1,3,-dihydroxy-2-propoxymethyl)guanine intravenously.

Acquired Immunodeficiency Syndrome↗
PubMed1989

An open study of interferon in HIV-antibody-positive men.

Alpha-2a-recombinant interferon (Roferon A) was given subcutaneously in a dose of 3 mega units twice weekly for 15-18 months to 14 HIV-antibody-positive, p24-antigen-negative men with minimal HIV-related disease. Interferon was well-tolerated and safe. Although there was either improvement or lack of deterioration initially in 22 out of 26 HIV disease markers, including lymphadenopathy, thrombocytopenic purpura and nail fungal infection, there were 11 instances of HIV disease indicators appearing during the study. At 15 months, six patients were withdrawn from the study because of clinical and immunological deterioration.

Adult↗