The respiratory tract can be infected by many different types of bacteria. Although the diseases that they cause may range from mild to severe, in most cases, the microbes remain localized within the respiratory system.

Bacterial Infections of the Respiratory System

Viruses are the most frequent cause of respiratory tract infections. Viral infections are tougher to combat. Fortunately, many of these diseases are mild and self-limiting.

Viral Infections of the Respiratory System

Respiratory mycoses are caused by fungi that inhabit the environment. These infections are generally transmitted via inhalation of fungal spores and cannot be transmitted between humans.

Fungal infections of the Respiratory System

The respiratory system is responsible for bringing oxygen into the body and removing carbon dioxide from it. It includes the nose, lungs, and other structures involved in breathing and gas exchange.

Austin Community College

- Skin & Eye
- Respiratory System 
- Urogenital System 
- Digestive System 
- Circulatory System
- Lymphatic System
- Nervous System
- Immune System

Body Systems Affected by Disease

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Skin & Eye

The urogenital system is a term for the urinary and reproductive systems in human anatomy.
- Urinary Tract
- Reproductive system 

Urogenital system

The digestive system, or gastrointestinal (GI) tract, helps the body digest and process food, starting with the mouth and ending at the anus. The digestive system is vulnerable to pathogenic attacks, hence GI diseases are quite common. Such diseases include those caused by infection or intoxication, the former often being caused by contaminated food and water.

Digestive System

A closed system of organs and vessels that circulate blood around the body to deliver oxygen, nutrients, and immune factors to tissues and to carry out waste products.

Circulatory System

A network of  vessels that manages fluid levels within the body, produces immune cells that combat infection, and filters out foreign bodies.

Lymphatic System

Respiratory System

A human's nervous system is in charge of managing our cognitions, movements, and responses. It is comprised of billions of neurons, glial cells, and the central and peripheral nervous systems. 

Nervous System

An autoimmune disease is a condition that arises when the immune system malfunctions, erroneously identifying the body's own healthy cells as foreign invaders and launching repeated attacks against them. The specific effects of an autoimmune disease vary depending on which part of the body is targeted by the immune response.

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