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M Gershman

Publications and source records attributed to M Gershman.

9 recordsLinked to original sources
PubMed1992

Community-acquired invasive group A beta-hemolytic streptococcal infections in Zuni Indians.

BACKGROUND: Outbreaks of invasive group A beta-hemolytic streptococcal (GABS) infections have recently been reported. We observed a high incidence of invasive GABS disease among Native Americans at a small rural community hospital between 1982 and 1991. METHODS: A retrospective chart review was performed, and all cases of invasive GABS disease were studied for their clinical features. RESULTS: Sixteen cases of invasive GABS infection were identified during the 10-year study period. The rate of invasive GABS infection was 13.3 cases per 100,000 population per year. Mortality was 25%. Nearly half of the patients presented with systemic signs of sepsis without any obvious source of infection. CONCLUSIONS: Our experience documents a high rate of invasive GABS infections in a defined Native American population. To determine whether this population has a unique susceptibility to GABS disease requires further study.

Adult↗
PubMed1977

Single phage-typing set for differentiating salmonellae.

A phage-typing system is described for characterizing commonly isolated salmonellae. Fifty-eight serovars representative of groups A, B, C1, C2, D, E1, E2, E3, and E4 were delineated by using a single set of 50 phages isolated from sewage. All of the 735 cultures used in this effort were typable and were distinguished and differentiated on the basis of the 347 phage patterns observed. All results were reproducible. Characteristic phage patterns were produced by a variety of Salmonella serovars isolated from a campus incident and a number of hospital and family outbreaks to indicate an existing epidemiological relationship.

Bacteriophage Typing↗
PubMed1975

A semi-quantitative test for water supply.

A recently marketed reagent strip designed for clinical urinalysis, Microstix, has been found to be useful in rapid and simple examination of water sources for baby chicks.

Animals↗
PubMedDate not supplied

Morphology of phages of a general Salmonella typing set.

The typing set includes 27 tailed phages belonging to three families, the Myoviridae (contractile tails, 4 phages), Siphoviridae (long, non-contractile tails, 21 phages) and Podoviridae (short tails, 2 phages). Heads are isometric or elongated. The phages fall into 10 morphological groups, seven of which correspond to known enterobacterial phage species (Jersey, N4, T5, T7, ZG/3a, chi, 16-19) and one to a Rhizobium phage species (CM1). T5-type and T7-type phages are for the first time reported in salmonellae. Two phages produce large amounts of abnormal mottled heads.

Bacteriophage Typing↗
PubMedDate not supplied

Molecular characterization of Salmonella enteritidis isolates from Maine poultry and poultry farm environments.

Eighty-six Salmonella enteritidis isolates obtained during a surveillance program of poultry farms in Maine were subjected to phage-typing, plasmid profiling and fingerprinting, outer-membrane polypeptide analysis, and antimicrobial sensitivity testing. Isolates were obtained from a variety of sources, including poultry-farm environmental samples, chicken organ samples, human stool samples, cat feces, and live-trapped rats and mice. These isolates were compared with 21 S. enteritidis isolates originating outside of Maine. Phage types isolated in Maine included 13a (60%); 14b (29%); 23 (5%); 8 (2%); and 2 (2%). All S. enteritidis isolates from Maine carried plasmid DNA, and 97% of these isolates carried a 40.3-megadalton plasmid alone (6%) or in conjunction with several smaller plasmids (91%). All 52 phage-type 13a isolates harbored 40.3- and 3.0-megadalton plasmids. All 25 phage-type 14b isolates carried 3.3- and 1.3-megadalton plasmids, and 22 isolates also carried the 40.3-megadalton plasmid. All isolates displayed highly similar outer-membrane polypeptide profiles and were sensitive to a variety of antimicrobials commonly used against gram-negative organisms. The above data suggest that phage type and plasmid content may be related in the cases of phage-type 13a and 14b isolates, and that traditional plasmid-borne antimicrobial resistance determinants were not present in Maine isolates. Results also indicate that phage-typing can be a valuable epizootiological tool for monitoring the potential spread of these strains throughout the Northeast.

Animals↗