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F J Allerberger

Publications and source records attributed to F J Allerberger.

10 recordsLinked to original sources
PubMed2003

A series of infections due to Capnocytophaga spp in immunosuppressed and immunocompetent patients.

OBJECTIVE: To investigate the epidemiology, microbiology and outcome of infections caused by Capnocytophaga spp. at a single center. METHODS: We report on ten documented infectious episodes caused by Capnocytophaga observed between 1994 and 1999 at the Innsbruck University Hospital. RESULTS: In seven of ten patients, Capnocytophaga septicemia was diagnosed during periods of neutropenia. In contrast, the remaining three patients had normal white blood cell counts when acquiring Capnocytophaga septicemia (one) and pleural empyema (two). Blood cultures containing long, slender, Gram-negative rods, which grew slowly under anaerobic conditions and lacked susceptibility to metronidazole, were subcultivated in a CO2-enriched atmosphere (5%). Subcultivation yielded Capnocytophaga in all ten cases within 2-12 days. The patients were then placed on appropriate antibiotic therapy, with or without additional surgical intervention, and the organism was eradicated. CONCLUSION: Identification of Capnocytophaga facilitates appropriate, and in most cases effective, antimicrobial therapy.

Adult↗
PubMed2002

Emerging linezolid-resistant Enterococcus faecalis and Enterococcus faecium isolated from two Austrian patients in the same intensive care unit.

Of two patients in the same intensive care unit who were treated with linezolid, one yielded linezolid-resistant Enterococcus faecalis, whereas the other yielded linezolid-resistant Enterococcus faecium. In each case, molecular typing indicated that the resistant isolates were related to linezolid-susceptible isolates from the same patient, but differed from them by the same G2576U ribosomal RNA mutation. This is the first clinical case report of emerging resistance to linezolid among Enterococcus faecalis and also the first report of resistance involving vancomycin-susceptible rather than vancomycin-resistant enterococci. The linezolid-resistant isolates showed cross-resistance to the experimental oxazolidinone AZD2563, suggesting that oxazolidinone resistance might be a class effect.

Acetamides↗
PubMed1992

Urinary tract infection caused by nontyphoidal Salmonella: report of 30 cases.

Thirty cases of nontyphoidal Salmonella bacteriuria were identified by review of cultures performed at the Mayo Clinic (Minn.) from 1985 to 1989 and at the Federal Public Health Laboratory Innsbruck (Austria) from 1979 to 1989. All patients had symptoms of an acute urinary tract infection (UTI). In 24 cases nontyphoidal Salmonella was the sole pathogen isolated. Only 1 patient presented with concomitant gastroenteritis and 2 had experienced episodes of diarrhea during the weeks before the UTI, but 15 patients had positive stool cultures in the absence of a gastrointestinal illness. Among all positive urine cultures at the Mayo Microbiology Laboratory, 0.015% were positive for nontyphoidal Salmonella; at the Federal Public Health Laboratory Innsbruck, 0.024% of organisms cultured from urine were nontyphoidal salmonellae. In the majority of our patients, Salmonella UTI did not differ clinically from UTI caused by other members of the Enterobacteriaceae; only in renal transplant recipients was the course of genitourinary salmonellosis more serious. While some urinary isolates of nontyphoidal Salmonella may be fecal contaminants, all 30 isolates recovered from urine during this study were considered to be the cause of symptomatic UTI.

Adolescent↗
PubMed1990

Results of a 6-month survey of stool cultures for Escherichia coli O157:H7.

Escherichia coli O157:H7 is a recently recognized enteric pathogen that causes acute hemorrhagic colitis. Although the infection is usually self-limited, it may be complicated by hemolytic uremic syndrome and thrombotic thrombocytopenic purpura. At our institution, stool specimens are now routinely cultured for this organism. To determine the prevalence of E. coli O157:H7-associated diarrhea in our patient population, we surveyed all submitted stool cultures for 6 months for this organism. Specimens were screened for non-sorbitol fermenting E. coli and confirmed by slide-agglutination and immobilization testing. Of 2,164 specimens, 10 yielded E. coli O157:H7. It was the fourth most common bacterial stool pathogen found. Bloody diarrhea and abdominal pain were the most common symptoms of the infected patients. E. coli O157:H7 causes sporadic infections in our patient population and should be considered in the differential diagnosis of acute hemorrhagic colitis.

Adolescent↗
PubMed1988

Microcalorimetric investigations on Listeria.

Sixty-one Listeria strains--Listeria monocytogenes (35 strains), Listeria ivanovii (8), Listeria innocua (7), Listeria welshimeri (6) and Listeria seeligeri (5)--were tested microcalorimetrically for their heat production upon growth in Columbia broth. Listeria ivanovii and Listeria seeligeri displayed different and quite characteristic thermograms. Listeria welshimeri, Listeria innocua and all but one of the Listeria monocytogenes strains showed similar microcalorimetric curves, which differed considerably from those of Listeria ivanovii and Listeria seeligeri.

Calorimetry↗
PubMed1987

Microcalorimetric assessment of liquid culture media.

Microcalorimetry constitutes an analytic tool to register the heat effects produced by the metabolic processes taking place in a bacterial culture. Since these depend on the nutrients supplied in the media, microcalorimetry allows conclusions to be drawn about the nature and quality of the culture medium when using a standard germ. Taking Columbia Broth as an example, we showed that faulty weighing of the dry substrate, incorrect pH or overheating during the dissolving or autoclaving procedures could be detected by the use of the microcalorimetry. A microcalorimetric assessment to compare media of the same name produced by different manufacturers was carried out and significant differences were observed. We consider this microcalorimetric technique to be a valuable tool in the assessment of liquid culture media.

Calorimetry↗
PubMed1986

[Septic disease pictures in Salmonella infections].

3715 strains of salmonella have been isolated from various sources from 1976 to 1985. 26 of these isolates have been S. typhi and paratyphi B, 3689 isolates were nontyphoid strains. 7 isolates of S. typhi and S. paratyphi have been isolated from blood cultures. All persons infected with these strains have acquired these organisms in tropical and subtropical areas. In contrast, salmonella gastroenteritis is mainly confined to the intestinal tract. 21 isolates of nontyphoid salmonellae, however, have been isolated from blood cultures. The vast majority of these patients showed compromised host defense mechanisms. Newborn infants up to 3 months are considered particularly vulnerable for bloodstream invasion with nontyphoid salmonellae. Patients with chronic consuming disorders, solid tumors and haematologic malignancies, and the treatment of these ailments with immunosuppressive drugs and corticosteroids predisposes patients for extraintestinal spread of an enteric salmonella infection. Corticosteroid therapy seems to be particularly responsible for a fulminant course of the disease and poor outcome of the infection.

Adolescent↗
PubMed1986

[Microcalorimetric study of Salmonella].

We investigated the heat production of 42 different Salmonella strains belonging to the serogroups A, B, C, D and E. Using Columbia- and Brain Heart Infusion Broth as growth media, we found 3 different types of heat profiles. Salmonella typhi and Salmonella choleraesuis showed thermograms which differed in shape from the remaining serotypes. The thermograms of one Salmonella dublin isolate which showed an atypical biochemical behaviour could not be put into proper relation to one of these 3 microcalorimetric types.

Calorimetry↗
PubMed1986

Influence of cephalosporines III generation with varying biliary excretion on fecal flora and emergence of resistant bacteria during and after cessation of therapy.

Excretion of an antibiotic bile may result in high intraintestinal concentrations and thus alteration in the fecal flora. We investigated the effect of ceftriaxone (45% biliary excretion) and cefotaxime (less than 5% biliary excretion) on the aerobic fecal flora. Ceftriaxone eradicated susceptible enteric organisms and resulted in overgrowth of Candida spp. and resistant enterococci. In some patients multiresistant gram negative bacteria appeared during of after therapy. Cefotaxime had a moderate effect on fecal microecology and did not promote the emergence of resistant organisms.

Bacteria↗