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2008 - Communication Across the Curriculum (CAC)

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R e s e a r c h P a p e r<br />

BIOL 2401: Anatomy and Physiology I. This report<br />

by Ana Maria Castro is an outstanding example of<br />

a research paper completed as part of <strong>the</strong> Anatomy<br />

and Physiology I course writing requirement. The<br />

report is a good example of <strong>the</strong> proper use of peerreviewed<br />

journal articles. Locating and using peer<br />

reviewed articles is a skill that many students find<br />

difficult. This report is also outstanding because it<br />

exemplifies <strong>the</strong> style of writing (tone, conciseness)<br />

that scientists use. Additionally, <strong>the</strong> report effectively<br />

and correctly uses figures, ano<strong>the</strong>r important science<br />

writing skill that not many of <strong>the</strong> students choose to<br />

develop (not a requirement for <strong>the</strong> assignment).<br />

Kathryn Gronlund<br />

Chagas’ Disease<br />

by Ana Maria<br />

Castro<br />

Abstract<br />

Chagas’ disease or American trypanosomiasis is a tropical<br />

disease prevalent in Latin American countries. It is a disease<br />

caused by <strong>the</strong> protozoan Trypanosoma cruzi which is transmitted<br />

to humans and animals by kissing bugs of <strong>the</strong> family reduviidae.<br />

The disease has three phases: acute, latent, and chronic and<br />

<strong>the</strong> symptoms vary from phase to phase. In <strong>the</strong> acute phase<br />

<strong>the</strong> symptoms are mild, but <strong>the</strong> parasitemia is high. When <strong>the</strong><br />

infection progresses, symptoms such as cardiomegalias and<br />

viseromegalias increase, but <strong>the</strong> parasitemia is low. The chronic<br />

disease is often fatal; however, <strong>the</strong>re are two drugs used to treat<br />

<strong>the</strong> disease: Benznidazol and Nifurtimox.<br />

Discussion<br />

Cause<br />

Chagas’ disease or American tripanosomiasis is produced<br />

by a protozoan known as Trypanasoma cruzi (Figure 1). This<br />

organism is a flagellate of <strong>the</strong> Kinetoplastida Order, Family<br />

Trypanosomatidae, characterized by <strong>the</strong> presence of a flagellum<br />

and a single mitochondrion in which is situated <strong>the</strong> Kinetoplast,<br />

a specialized DNA-containing organelle (Brusca 133). The<br />

vectors of this disease are hematophagus commonly known<br />

as kissing bugs of <strong>the</strong> family Reduviidae and genus Rhodnius,<br />

Triatoma, and Panstrongylus (Brusca 614). These insects get<br />

infected when <strong>the</strong>y suck <strong>the</strong> blood of an animal or human that<br />

has <strong>the</strong> parasite in its circulatory system. Within <strong>the</strong> digestive<br />

tube of <strong>the</strong> bug, <strong>the</strong> protozoan evolves and <strong>the</strong> infective stage<br />

V o l u m e I V : F a l l 2 0 0 8<br />

1 0

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