Thesis (M. E.)--University of Canterbury, 2008. / Typescript (photocopy). "January 2008." Includes bibliographical references (leaves 50-56). Also available via the World Wide Web.

Thesis (M.S.)--University of Wisconsin--Madison, 1932. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf [29]).

M.Tech. (Medical Technology) / Please refer to full text to view abstract

No description available.

Section I: Facultative and obligatory anaerobic bacteria were isolated from the ground water of a sanitary landfill characterized by sandy soil and a periodically high water table. Isolates were examined for 63 characteristics and subject to numerical analysis. Eight clusters were established and correlations with conventional taxonomy were made. The Bacteriodaceae were found to be the dominant group of organisms by the methods employed. The anaerobic population was observed to decrease as the period of seasonal rainfall ended. At the same time, gram positive anaerobes were largely replaced with gram negative ones. Leaching between sampling sites (wells) made correlations between metabolic end products (observed by gas-liquid chromatography) and metabolites produced by the organisms in vitro, impossible. Attempts were made to modify the original test battery to create a smaller battery which would yield approximately the same groupings as the original battery. Clusters became less discreet with these modifications and probably unacceptable for detailed taxonomic work. Section II: An index is described which measure the "goodness of fit" of an organism within a phenon as established by numerical taxonomy. A hypothetical mean organism was established for each phenon. Similarity and relevance coefficients were generated between this hypothetical organism and each member of the phenon. The product of these two coefficients has been termed the Index of Relevance and Similarity (IRS). This index ranges from zero to unity and can be generated with two-state and/or multistate data.

published_or_final_version / Environmental Management / Master / Master of Science in Environmental Management

Five species of methanogenic bacteria were analyzed for the presence of plasmid DNA. Several procedures for the detection and isolation of covalently closed circular plasmid DNA were modified for use with the methanogens.

MSc Med, Clinical Microbiology and Infectious Diseases, Faculty of Health Sciences,University of the Witwatersrand, 2009 / Anaerobic bacteria cause serious life-threatening infections such as endocarditis, sepsis, intra abdominal, pleuro-pulmonary and central nervous systems infections. Most infections are polymicrobial and involve aerobes and anaerobes. Empiric therapy is generally based on the expected pathogens and the particular type of infection. Even when specimens are cultured and anaerobes identified, not all laboratories perform susceptibility testing. The clinician often relies on published surveillance data when selecting treatment regimens. Antimicrobial susceptibility of anaerobic bacteria is becoming increasingly unpredictable. Resistance can vary significantly and patterns differ geographically, and even within units of the same hospital. From June 2005 until February 2007, 180 consecutive anaerobes isolated from relevant, non- repetitive clinical specimens were tested routinely with the E test method for susceptibility to amoxicillin/ clavulanate (XL), clindamycin (Cm), metronidazole (Mz), penicillin (Pg), ertapenem (Etp), cefoxitin (Fx), ceftriaxone (Tx), chloramphenicol (Cl), and piperacillin/tazobactam (Ptc). The results were read after 48hr incubation in anaerobic conditions. Specimen distribution was as follows: abdominal fluid (3), abscess (7), abdominal abscess (4), aspirates (3), blood cultures (27), bone (3), breast (3), drainage fluid (2), empyema (1), fluids (36), other (4), placental (1), pleural fluid (2), pus (41), tissues (34), umbilicus (1) and unknown sites (8). Bacteroides fragilis was isolated from 81 (45%) clinically significant specimens, followed by Clostridium perfringens 23 (13%), Peptostreptococcus anaerobius 15 (8%) and Prevotella melaniniogenicus 15 (8%). B. fragilis demonstrated a 97.5% resistance to penicillin and 12.3% resistance to metronidazole. C. perfringens exhibited no resistance to penicillin and metronidazole while P. anaerobius had 40% resistance to penicillin and no resistance to metronidazole. P. melaninogenicus was resistant to penicillin in 60% and 6.7% to metronidazole. Overall, chloramphenicol, piperacillin/tazobactam, ertapenem and amoxicillin/clavulanate demonstrated the highest activity to anaerobic isolates, 100%, 99.4%, 97.2% and 96.7%, respectively. Among the 180 tested anaerobes a total of 8.9% resistance has been observed with metronidazole and 81.7% sensitivity with clindamycin. Periodic surveillance to monitor the susceptibility profile of the B. fragilis group and other anaerobic organisms is recommended to create empirical guidelines for appropriate use of antimicrobial agents.

by Kwok-wai Lo. / Thesis (M.Ph.)--Chinese University of Hong Kong, 1987. / Bibliography: leaves 183-194.

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