S. L. Erlandsen

Prevalence of Giardia cysts and Cryptosporidium oocysts and characterization of Giardia spp. isolated from drinking water in Canada.

Wallis, P M, Erlandsen, S L, Isaac-Renton, J L, Olson, M E, Robertson, W J, Van Keulen, H

This study was carried out to estimate the prevalence and potential for human infectivity of Giardia cysts in Canadian drinking water supplies. The presence of Cryptosporidium oocysts was also noted,...

Prevalence of Giardia spp. in beaver and muskrat populations in northeastern states and Minnesota: detection of intestinal trophozoites at necropsy provides greater sensitivity than detection of cysts in fecal samples.

Erlandsen, S L, Sherlock, L A, Bemrick, W J, Ghobrial, H, Jakubowski, W

Surveys of the prevalence of the intestinal protozoan Giardia spp. in animal populations have relied almost exclusively on the detection of cysts in fecal samples. We have determined the prevalence...

Viability of Giardia cysts suspended in lake, river, and tap water.

DeRegnier, D P, Cole, L, Schupp, D G, Erlandsen, S L

Numerous waterborne outbreaks of giardiasis have occurred since 1965, yet little or no information has been reported on the viability of Giardia cysts in different aquatic environments. We have...

A new method to determine Giardia cyst viability: correlation of fluorescein diacetate and propidium iodide staining with animal infectivity.

Schupp, D G, Erlandsen, S L

The viability of Giardia muris cysts was studied with the fluorogenic dyes fluorescein diacetate (FDA) and propidium iodide (PI). G. muris cysts were seen to fluoresce intensely green with FDA at an...

Cross-species transmission of Giardia spp.: inoculation of beavers and muskrats with cysts of human, beaver, mouse, and muskrat origin.

Erlandsen, S L, Sherlock, L A, Januschka, M, Schupp, D G, Schaefer, F W, Jakubowski, W, ...

Giardia cysts isolated from humans, beavers, mice, and muskrats were tested in cross-species transmission experiments for their ability to infect either beavers or muskrats. Giardia cysts, derived...

High-resolution visualization by field emission scanning electron microscopy of Enterococcus faecalis surface proteins encoded by the pheromone-inducible conjugative plasmid pCF10.

Olmsted, S B, Erlandsen, S L, Dunny, G M, Wells, C L

Enterococcus faecalis can acquire antibiotic resistance and virulence genes by transfer of pheromone-inducible conjugative plasmids such as pCF10, which encodes tetracycline resistance. Two...

Evidence for a complex life cycle and endospore formation in the attached, filamentous, segmented bacterium from murine ileum.

Chase, D G, Erlandsen, S L

Light and electron microscope observations showed that the filamentous, segmented bacterium commonly found attached to the ileal epithelium of rats and mice undergoes a complex life cycle. Filaments...

Localization of translocating Escherichia coli, Proteus mirabilis, and Enterococcus faecalis within cecal and colonic tissues of monoassociated mice.

Wells, C L, Erlandsen, S L

Normal bacteria can translocate (migrate) across an intact intestinal mucosa, but the anatomical site of bacterial translocation has not been defined. Gastrointestinal (GI) cross-sections were...

Evidence for the phagocytic transport of intestinal particles in dogs and rats.

Wells, C L, Maddaus, M A, Erlandsen, S L, Simmons, R L

Fluorescent latex beads of two different colors were implanted into separate intestinal segments in individual dogs and rats. Mesenteric lymph node phagocytes subsequently contained multiple beads of...

Nucleotide sequence of the 5.8S and large subunit rRNA genes and the internal transcribed spacer and part of the external spacer from Giardia ardeae.

Van Keulen, H, Horvat, S, Erlandsen, S L, Jarroll, E L

Conditions critical for optimal visualization of bacteriophage adsorbed to bacterial surfaces by scanning electron microscopy.

Wendelschafer-Crabb, G, Erlandsen, S L, Walker, D H

The potential of scanning electron microscopy as a tool for the detection of viruses on cell surfaces has been studied using bacteriophage P1 adsorbed to Shigella dysenteriae as a model system. Viral...

Prevalence of Giardia cysts and Cryptosporidium oocysts and characterization of Giardia spp. isolated from drinking water in Canada.

Wallis, P M, Erlandsen, S L, Isaac-Renton, J L, Olson, M E, Robertson, W J, Van Keulen, H

This study was carried out to estimate the prevalence and potential for human infectivity of Giardia cysts in Canadian drinking water supplies. The presence of Cryptosporidium oocysts was also noted,...

Prevalence of Giardia spp. in beaver and muskrat populations in northeastern states and Minnesota: detection of intestinal trophozoites at necropsy provides greater sensitivity than detection of cysts in fecal samples.

Erlandsen, S L, Sherlock, L A, Bemrick, W J, Ghobrial, H, Jakubowski, W

Surveys of the prevalence of the intestinal protozoan Giardia spp. in animal populations have relied almost exclusively on the detection of cysts in fecal samples. We have determined the prevalence...

Viability of Giardia cysts suspended in lake, river, and tap water.

DeRegnier, D P, Cole, L, Schupp, D G, Erlandsen, S L

Numerous waterborne outbreaks of giardiasis have occurred since 1965, yet little or no information has been reported on the viability of Giardia cysts in different aquatic environments. We have...

A new method to determine Giardia cyst viability: correlation of fluorescein diacetate and propidium iodide staining with animal infectivity.

Schupp, D G, Erlandsen, S L

The viability of Giardia muris cysts was studied with the fluorogenic dyes fluorescein diacetate (FDA) and propidium iodide (PI). G. muris cysts were seen to fluoresce intensely green with FDA at an...

Cross-species transmission of Giardia spp.: inoculation of beavers and muskrats with cysts of human, beaver, mouse, and muskrat origin.

Erlandsen, S L, Sherlock, L A, Januschka, M, Schupp, D G, Schaefer, F W, Jakubowski, W, ...

Giardia cysts isolated from humans, beavers, mice, and muskrats were tested in cross-species transmission experiments for their ability to infect either beavers or muskrats. Giardia cysts, derived...

High-resolution visualization by field emission scanning electron microscopy of Enterococcus faecalis surface proteins encoded by the pheromone-inducible conjugative plasmid pCF10.

Olmsted, S B, Erlandsen, S L, Dunny, G M, Wells, C L

Enterococcus faecalis can acquire antibiotic resistance and virulence genes by transfer of pheromone-inducible conjugative plasmids such as pCF10, which encodes tetracycline resistance. Two...

Evidence for a complex life cycle and endospore formation in the attached, filamentous, segmented bacterium from murine ileum.

Chase, D G, Erlandsen, S L

Light and electron microscope observations showed that the filamentous, segmented bacterium commonly found attached to the ileal epithelium of rats and mice undergoes a complex life cycle. Filaments...

Localization of translocating Escherichia coli, Proteus mirabilis, and Enterococcus faecalis within cecal and colonic tissues of monoassociated mice.

Wells, C L, Erlandsen, S L

Normal bacteria can translocate (migrate) across an intact intestinal mucosa, but the anatomical site of bacterial translocation has not been defined. Gastrointestinal (GI) cross-sections were...

Evidence for the phagocytic transport of intestinal particles in dogs and rats.

Wells, C L, Maddaus, M A, Erlandsen, S L, Simmons, R L

Fluorescent latex beads of two different colors were implanted into separate intestinal segments in individual dogs and rats. Mesenteric lymph node phagocytes subsequently contained multiple beads of...

Nucleotide sequence of the 5.8S and large subunit rRNA genes and the internal transcribed spacer and part of the external spacer from Giardia ardeae.

Van Keulen, H, Horvat, S, Erlandsen, S L, Jarroll, E L

Conditions critical for optimal visualization of bacteriophage adsorbed to bacterial surfaces by scanning electron microscopy.

Wendelschafer-Crabb, G, Erlandsen, S L, Walker, D H

The potential of scanning electron microscopy as a tool for the detection of viruses on cell surfaces has been studied using bacteriophage P1 adsorbed to Shigella dysenteriae as a model system. Viral...