Pathogenic Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Pathogenic and links to relevant pages within the course.
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| Review 1 Podschun R. Ullmann U.:
Klebsiella spp. as nosocomial pathogens: epidemiology, taxonomy, typing methods, and pathogenicity factors
Clinical Microbiology Reviews. 11(4):589-603, 1998Bacteria belonging to the genus Klebsiella frequently cause human nosocomial infections. In particular, the medically most important Klebsiella species, Klebsiella pneumoniae, accounts for a significant proportion of hospital-acquired urinary tract infections, pneumonia, septicemias, and soft tissue infections.The principal pathogenic reservoirs for transmission of Klebsiella are the gastrointestinal tract and the hands of hospital personnel. Because of their ability to spread rapidly in the hospital environment, these bacteria tend to cause nosocomial outbreaks. Hospital
outbreaks of multidrug-resistant Klebsiella spp., especially those in neonatal wards, are often caused by new types of strains, the so-called extended-spectrum-beta-lactamase (ESBL) producersThe incidence of ESBL-producing strains among clinical Klebsiella isolates has been steadily increasing over the past years. The resulting limitations on the therapeutic options demand new measures for the management of Klebsiella hospital infections.While the different typing methods are useful epidemiological tools for infection control, recent findings about Klebsiella virulence factors have provided new insights into the pathogenic strategies of these bacteria. Klebsiella pathogenicity factors such as capsules or lipopolysaccharides are presently considered to be promising candidates for vaccination efforts that may serve as immunological infection control measures. | View Page |
| The hands of hospital personnel represents one of the major reservoirs for the persistence and potential spread of ESBL producing strains of Klebsiella pneumoniae in the hospital environment. | View Page |
| Measuring particle number instead of cholesterol content has which of the following features or limitations? | View Page |
| The fungus illustrated in this photomicrograph was recovered from an induced sputum specimen from a 74 year old man with chronic obstructive pulmonary disease. This isolate is most likely: | View Page |
| A presumptive identification of the four genera of slower growing pathogenic dematiaceous molds can be made by observing specific types of conidiation. Match the names of the species of dematiaceous pathogenic fungi with the corresponding microscopic features illustrated in the photomicrographs: | View Page |
| Match the names of each of the fungi listed with its appropriate category indicating the degree of pathogenicity. | View Page |
| Saprophytic Cladosporium species may be difficult to differentiate from Cladosporium trichoides (Xylohypha bantianum) in culture as both produce chains of conidia separated by distinct scars or dysjuncters. Each of the following characteristics of Cladosporium trichoides are helpful in separating the two except: | View Page |
| Arrange the yeast species listed in the drop-down box in order of increasing virulence, from the least to the most pathogenic. | View Page |
| The ELISA method may be used to detect: | View Page |
| Which of the following parasites causes both intestinal and extraintestinal amebiasis? | View Page |
| Protozoal parasites that typically do not produce disease in humans are referred to as being: | View Page |
| Label the morphologic structures on this parasite form: | View Page |
| A 17 year old female went to her doctor complaining of diarrhea. With the exception of seasonal allergies, she was in relatively good health. Patient history was unremarkable. A stool was submitted for culture and parasite examination. The culture was reported out as "no enteric pathogens isolated." This suspicious form was seen on wet preparation and permanent stain. It measures 27 µm. This patient is most likely suffering from which of the following conditions: | View Page |
| The locomotive structures of Entamoeba histolytica are known as: | View Page |
| The presence of parasites in human blood is termed: | View Page |