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Infectious Diseases and Their Occurrence

Infectious Diseases and Their Occurrence

Infectious diseases appear in populations through various transmission patterns, influenced by pathogen characteristics, population immunity, environmental conditions, and social behavior. Understanding these patterns is essential for effective public health surveillance and intervention. These categories—sporadic, outbreak, epidemic, pandemic, and endemic—help frame the nature and scope of disease events.Sporadic diseases occur irregularly and infrequently, without a predictable temporal or...

Infection

Infection

When a pathogen enters the body and reproduces, it can cause an infection, damage body cells, and cause illness symptoms that eventually lead to disease. Therefore, its prevention requires breaking the chain of infection.
The chain begins with pathogens: bacteria, viruses, fungi, prions, or parasites such as protozoa helminths. These can be present on the skin as transient or resident flora, or they can be acquired from the environment. Identifying and treating the type of infection and...

Reservoir of Infection

Reservoir of Infection

Infectious diseases arise from intricate interactions between pathogens and their reservoirs. A reservoir of infection refers to the natural habitat where a pathogen lives, grows, and multiplies, serving as a continual source of infection. Reservoirs are broadly classified as either living or nonliving, and each plays a unique role in disease transmission, significantly influencing public health interventions and control strategies.Humans act as reservoirs for a wide array of pathogens,...

Cytomegalovirus Disease

Cytomegalovirus Disease

Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...

Intracellular Movement of Viruses and Bacteria

Intracellular Movement of Viruses and Bacteria

Intracellular bacteria and viruses often comprise a group of highly infectious pathogens that can cause several diseases. Bacterial pathogens include those belonging to the genus Rickettsia responsible for conditions such as rocky mountain spotted fever and the Mediterranean spotted fever; Chlamydia, a genus responsible for a sexually transmitted disease; Coxiella burnetii, an agent responsible for Q fever. Viral pathogens include vaccinia—a poxvirus, and herpes simplex virus—a virus that...

Skin Diseases and Disorders

Skin Diseases and Disorders

Skin is the first line of defense and encounters a variety of microbes. Some pathogenic strains are often the cause of a broad range of infections of the skin and other body systems. These conditions can affect people of all ages and may have different causes, including genetic factors, infections, autoimmune reactions, environmental factors, and lifestyle choices.
Gram-positive Staphylococcus spp. and Streptococcus spp. are responsible for many of the most common skin infections. However, many...

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Related Experiment Video

Updated: Jun 1, 2026

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria

Published on: April 2, 2013

Infectious disease.

Carrie A Jaworski¹, Brian Donohue, Joshua Kluetz

¹Intercollegiate Sports Medicine, Northwestern University, Evanston, IL 60208, USA. c-jaworski@northwestern.edu

Clinics in Sports Medicine

|June 11, 2011

Summary

Athletes face unique challenges with infectious diseases, impacting performance and team health. This review covers managing common illnesses and special conditions in sports medicine.

Area of Science:

Sports Medicine
Infectious Diseases
Athletic Performance

Background:

Athletes are susceptible to common infections.
Infectious diseases in athletes require special management considerations.
Illnesses can impact athletic performance and team communicability.

Purpose of the Study:

To review recent advances in managing infections in athletes.
To discuss considerations for athletic participation with infectious diseases.
To highlight conditions needing special attention in sports settings.

Main Methods:

Literature review of recent advances.
Discussion of prevention, diagnosis, and management strategies.
Analysis of athletic participation precautions and contraindications.

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Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses

Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses

Published on: February 22, 2019

Ex Vivo Infection of Human Lymphoid Tissue and Female Genital Mucosa with Human Immunodeficiency Virus 1 and Histoculture

Ex Vivo Infection of Human Lymphoid Tissue and Female Genital Mucosa with Human Immunodeficiency Virus 1 and Histoculture

Published on: October 12, 2018

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Last Updated: Jun 1, 2026

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria

Published on: April 2, 2013

Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses

Using a Bacterial Pathogen to Probe for Cellular and Organismic-level Host Responses

Published on: February 22, 2019

Ex Vivo Infection of Human Lymphoid Tissue and Female Genital Mucosa with Human Immunodeficiency Virus 1 and Histoculture

Ex Vivo Infection of Human Lymphoid Tissue and Female Genital Mucosa with Human Immunodeficiency Virus 1 and Histoculture

Published on: October 12, 2018

Main Results:

Common illnesses affect athletes differently.
Team communicability and return-to-play decisions are critical.
Specific conditions require tailored management in athletic populations.

Conclusions:

Infectious disease management in athletes needs a multidisciplinary approach.
Understanding illness impact on performance and transmission is key.
Evidence-based guidelines are essential for athlete health and safety.