Anatomy and Normal Microbiota of the Digestive System Microbial Diseases of the Mouth and Oral Cavity Bacterial Infections of the Gastrointestinal Tract Viral Infections of the Gastrointestinal Tract Protozoan Infections of the Gastrointestinal Tract Helminthic Infections of the Gastrointestinal Tract
Learning Objectives By the end of this section, you will be able to: Helminths are widespread intestinal parasites. These parasites can be divided into three common groups: round-bodied worms also described as nematodes, flat-bodied worms that are segmented (also described as cestodes),…
Learning Objectives By the end of this section, you will be able to: Like other microbes, protozoa are abundant in natural microbiota but can also be associated with significant illness. Gastrointestinal diseases caused by protozoa are generally associated with exposure to contaminated…
Learning Objectives By the end of this section, you will be able to: In the developing world, acute viral gastroenteritis is devastating and a leading cause of death for children.13 Worldwide, diarrhea is the second leading cause of mortality for children under age…
as asymptomatic carriers) and continually shed them through their feces. These carriers often have the bacteria in the gallbladder or intestinal epithelium. Individuals consuming food or water contaminated with these feces can become infected. S. typhi penetrate the intestinal mucosa, grow…
Learning Objectives By the end of this section, you will be able to: Despite the presence of saliva and the mechanical forces of chewing and eating, some microbes thrive in the mouth. These microbes can cause damage to the teeth and can…
Learning Objectives By the end of this section, you will be able to: Clinical Focus Part 1 After a morning of playing outside, four-year-old Carli ran inside for lunch. After taking a bite of her fried egg, she pushed it…
Figure 24.1 E. coli O157:H7 causes serious foodborne illness. Curli fibers (adhesive surface fibers that are part of the extracellular matrix) help these bacteria adhere to surfaces and form biofilms. Pictured are two groups of cells, curli non-producing cells (left) and curli producing…
Anatomy and Normal Microbiota of the Urogenital Tract Bacterial Infections of the Urinary System Bacterial Infections of the Reproductive System Viral Infections of the Reproductive System Fungal Infections of the Reproductive System Protozoan Infections of the Urogenital System
Learning Objectives By the end of this section, you will be able to: Only one major protozoan species causes infections in the urogenital system. Trichomoniasis, or “trich,” is the most common nonviral STI and is caused by a flagellated protozoan Trichomonas vaginalis. T.…