Topic: Communicable Disease/Sexually Transmitted Disease
Class Lessons Page
Quicktime clips associated with ebola virus infections, a thesis project from a Stanford student (please NOTE: some links are non-functional; the body bag link can be found at the following website: http://www.stanford.edu/group/virus/filo/bodybag.html)
The Big Picture Book of Viruses, a catalog of virus pictures on the Web, is available through Tulane University
A bacterium is a single-celled microscopic organism, although larger than a virus. Examples of bacterial infections include chlamydia, strep throat, diptheria, and tetanus. Merck.com shows shapes of bacteria (R). Many bacterial infections are curable with antibiotics or sulfa drugs, although some individuals are allergic to such medications. Unfortunately, some bacteria have become resistant to current drug treatments, due to the development of new bacterial strains. The reasons for resistance can be multifactorial, such as incomplete therapy, coexisting illness, poor living conditions, etc. An example of this problem is tuberculosis, seen in the United States. If interested, travel to the American Lung Association for general information about tuberculosis (O).
PHIL shows a variety of magnified bacteria images, including those listed below (O). To access the images, go to PHIL's search page, checkmark "photos," and search for the items listed (O):
The World Health Organization has a 2004 publication titled antituberculosis drug resistance in the world
New York State Department of Health fact sheet about anthrax
MRSA Infection - Mayo Clinic Information
A fungus is a plantlike organism and is not a large contributor of human diseases. Examples of fungi-related human afflictions include athlete's foot, "jock itch," and vaginal yeast infections. Such fungal infections can be treated and controlled. The University of Iowa Libraries site shows images of athlete's foot (O--WARNING: sensitive photos). Doctorfungus.org ("Dr. Fungus") provides a list and descriptions of human fungal infections (O-you may need to agree to a statement, then select "In People" under the "Think You Have a Fungal Infection" section).
PHIL shows a variety of magnified fungi images, including those listed below (O). To access the images, go to PHIL's search page, checkmark "photos," and search for the items listed (O):
Fungal Infections of the Skin (American Academy of Dermatology)
Protozoa are very small single-celled organisms with wall structure different from bacteria and fungi. Examples of protozoan infections include malaria, giardiasis (O--DPDx image library), (O--DPDx image library), cryptospiridium (O--Centers for Disease Control), trichomoniasis(R--DPDx video). If you cannot access the DPDxvideo clip, be sure to look at any of the DPDx images or one or more through Queensland University of Technology.
The Cells Alive! features a cryptospiridium movie (O); look for link in paragraph of content beneath images)
The World Health Organization offers information on malaria
The Centers for Disease Control offers information about giardiasis
The term "parasitic worms" refers to
multi-celled animals, some of them microscopic in
size, others very large. Tapeworms, which reside
in the gastrointestinal tract, and trichinosis
are examples of parasitic worm infections. For a little more
information, read the
description provided by Merck (R).
The University of California--San Diego's Division of Biological Sciences features a photo of an adult hookworm attached to a small intestine, feeding on (R).
If interested, look for parasitic infections by searching PHIL:
The World Health Organization provides information on parasite control
Infection Prevention Online Course, from Engenderhealth
WormLearn, created by Dr. Peter Darben
The WHO Global Health Atlas allows the online viewer to research information related to communicable disease
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