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17: Systemic Infections

Last updated

Mar 13, 2024
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- 16.E: The Eukaryotes of Microbiology (Exercises)
- 17.1: Respiratory System Infections

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17.1: Respiratory System Infections
The respiratory tract is one of the main portals of entry into the human body for microbial pathogens. On average, a human takes about 20,000 breaths each day. This roughly corresponds to 10,000 liters, or 10 cubic meters, of air. Suspended within this volume of air are millions of microbes of terrestrial, animal, and human origin—including many potential pathogens. A few of these pathogens will cause relatively mild infections like sore throats and colds. Others, however, are less benign.
17.2: Urogenital System Infections
The urogenital system is a combination of the urinary tract and reproductive system. Because both systems are open to the external environment, they are prone to infections. Some infections are introduced from outside, whereas others result from imbalances in the microbiota of the urogenital tract. In this chapter, we will discuss the various microbes that cause urogenital disease and the factors that contribute to their pathogenicity.
17.3: Digestive System Infections
Gastrointestinal (GI) diseases are so common that, unfortunately, most people have had first-hand experience with the unpleasant symptoms, such as diarrhea, vomiting, and abdominal discomfort. The causes of gastrointestinal illness can vary widely, but such diseases can be grouped into two categories: those caused by infection (the growth of a pathogen in the GI tract) or intoxication (the presence of a microbial toxin in the GI tract).
17.4: Circulatory and Lymphatic System Infections
Many of the circulatory and lymphatic diseases discussed in this chapter are emerging or re-emerging worldwide. Despite medical advances, diseases like malaria, Ebola, and others could become endemic in the US given the right circumstances.
17.5: Nervous System Infections
Rabies is an example of a neurological disease caused by an acellular pathogen. The rabies virus enters nervous tissue shortly after transmission and makes its way to the central nervous system, where its presence leads to changes in behavior and motor function. Rabies claims tens of thousands of human lives worldwide. However, it is not the only disease with serious or fatal neurological effects. In this chapter, we examine the important microbial diseases of the nervous system.
17.6: Fungal Diseases of the Respiratory System
17.7: Fungal and Protozoan Diseases of the Digestive System
17.8: Helminthic Diseases of the Digestive System
17.9: Fungal and Protozoan Diseases of the Reproductive System
17.10: Fungal Skin and Nail Diseases
17.11: Parasitic Skin Diseases
Parasites can cause skin infections and common examples include creeping eruption, lice, and scabies.
17.12: Other Infectious Eye Diseases
17.13: Fungal, Protozoan, Prion, and Other Diseases of the Nervous System

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