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Factors Affecting the Risk of Infection01:26

Factors Affecting the Risk of Infection

The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
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Transmission-based Precautions II: Airborne and Protective Environment

Transmission-based precautions are for patients infected or suspected to be infected (or colonized) with organisms posing a significant risk to others. The transmission precautions include airborne and protective environment precautions.
Airborne precautions:
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Immunodeficiency Diseases01:25

Immunodeficiency Diseases

Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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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...
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Related Experiment Video

Updated: Jul 7, 2026

Comparative in vivo Study of gp96 Adjuvanticity in the Frog Xenopus laevis
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Do I Sound Sick? Condition-Dependent Advertisement Signals in Naturally Infected Frogs.

Trina L Chou1,2, Sarah A R Schrock3, Mark Q Wilber3

  • 1Department of Ecology & Evolutionary Biology University of Tennessee Knoxville Tennessee USA.

Ecology and Evolution
|October 20, 2025
PubMed
Summary
This summary is machine-generated.

Amphibian infection by Batrachochytrium dendrobatidis (Bd) had minimal impact on male spring peeper calls. However, infection influenced call duration based on male body condition, potentially impacting sexual selection.

Keywords:
Batrachochytrium dendrobatidis (Bd)acoustic communicationbehavioral tolerancebody conditioninfection‐mediated signalingspring peeper

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Area of Science:

  • Animal Behavior
  • Disease Ecology
  • Evolutionary Biology

Background:

  • Male frogs use advertisement calls in leks for reproductive success, with calls conveying individual quality.
  • Disease and infection can impact calling behavior, but mechanisms and effects are not fully understood.
  • Understanding infection's effects on signal production is crucial for inferring evolutionary consequences.

Purpose of the Study:

  • To investigate the impact of Batrachochytrium dendrobatidis (Bd) infection on the advertisement calling behavior of male spring peepers (Pseudacris crucifer).
  • To determine if infection status is reflected in dynamic call traits, potentially affecting female mate choice.
  • To explore the relationship between infection load, body condition, and specific call characteristics.

Main Methods:

  • Studied spring peepers (Pseudacris crucifer) to assess the effects of Batrachochytrium dendrobatidis (Bd) infection on male advertisement calls.
  • Analyzed call rate, dominant frequency, and call duration in relation to infection load.
  • Examined how body condition moderates the effects of infection on calling behavior.

Main Results:

  • Overall, Bd infection had minimal effects on male spring peeper calling behavior, with no significant impact on call rate or dominant frequency.
  • Bd infection exhibited body condition-dependent effects on call duration, a trait with intermediate within-individual variation.
  • Males in better condition showed longer call durations as infection increased, while males in poorer condition showed shorter durations.

Conclusions:

  • Some infected males display behavioral tolerance, prioritizing current reproductive effort (calling) over disease resistance.
  • Sexual selection for attractive calls may inadvertently select for males with higher infection loads.
  • Findings suggest complex interactions between disease, behavior, and sexual selection in amphibian populations.