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M M Mazzoni

Publications and source records attributed to M M Mazzoni.

3 recordsLinked to original sources
PubMed1999

Revised geochronology of the Casamayoran South American Land Mammal Age: climatic and biotic implications.

Isotopic age determinations (40Ar/39Ar) and associated magnetic polarity stratigraphy for Casamayoran age fauna at Gran Barranca (Chubut, Argentina) indicate that the Barrancan "subage" of the Casamayoran South American Land Mammal "Age" is late Eocene, 18 to 20 million years younger than hitherto supposed. Correlations of the radioisotopically dated magnetic polarity stratigraphy at Gran Barranca with the Cenozoic geomagnetic polarity time scale indicate that Barrancan faunal levels at the Gran Barranca date to within the magnetochronologic interval from 35.34 to 36.62 megannums (Ma) or 35. 69 to 37.60 Ma. This age revision constrains the timing of an adaptive shift in mammalian herbivores toward hypsodonty. Specifically, the appearance of large numbers of hypsodont taxa in South America occurred sometime between 36 and 32 Ma (late Eocene-early Oligocene), at approximately the same time that other biotic and geologic evidence has suggested the Southern high latitudes experienced climatic cooling associated with Antarctic glaciation.

Journal Article↗
PubMed1998

Medically sound, cost-effective treatment for pelvic inflammatory disease and tuboovarian abscess.

OBJECTIVE: Our purpose was to determine the clinical effectiveness and cost-effectiveness of three antibiotic regimens for the treatment of pelvic inflammatory disease and tuboovarian abscess. STUDY DESIGN: A review of all patients' hospitalized at Hutzel Hospital, Detroit, Michigan, for treatment of pelvic inflammatory disease and tuboovarian abscess between Jan. 1, 1993, and April 30, 1997, was performed. Demographic data, antibiotic choices, changes in therapy, operative interventions, and cost of therapy were assessed. RESULTS: Two hundred three patients were admitted for treatment of pelvic inflammatory disease during the study period. We were able to evaluate the clinical efficacy of antibiotic treatment in 179 patients, including 105 patients with pelvic inflammatory disease alone (uncomplicated pelvic inflammatory disease) and 74 women whose infection was complicated by tuboovarian abscess. The three antibiotic regimens evaluated were cefotetan plus doxycycline, clindamycin plus gentamicin, and ampicillin plus clindamycin plus gentamicin. All regimens demonstrated comparable efficacy in treating uncomplicated genital tract infections. Ampicillin plus clindamycin plus gentamicin was significantly better than clindamycin plus gentamicin and cefotetan plus doxycycline in treatment of tuboovarian abscess (p = 0.001). Fifteen women with tuboovarian abscess responded to a change to ampicillin plus gentamicin plus clindamycin antibiotic therapy alone. The hospital stay was prolonged by approximately 3 days in women failing to respond to initial antibiotic therapy, and operative interventions were common in this group of patients. CONCLUSIONS: Cefotetan plus oral doxycycline is the most cost-effective regimen for treating uncomplicated pelvic inflammatory disease, whereas triple-antibiotic therapy is the treatment of choice in women with tuboovarian abscess.

Abscess↗