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Related Concept Videos

Reservoir of Infection01:30

Reservoir of Infection

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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,...
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Bacterial Phylum Spirochaetes01:30

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Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased...
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Infectious Diseases and Their Occurrence01:28

Infectious Diseases and Their Occurrence

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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...
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Sexually Transmitted Infections01:26

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Sexually transmitted infections (STIs) are diseases transmitted primarily through unsafe sexual interactions. Bacteria, viruses, or parasites cause them and can result in severe health complications if untreated.ChlamydiaThe bacterium Chlamydia trachomatis is responsible for the disease Chlamydia, the most common STI in the United States. This peculiar pathogen requires human cells to reproduce, residing intracellularly. The initial infection often goes unnoticed because it typically does not...
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Infection01:20

Infection

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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.
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Hepatitis01:25

Hepatitis

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Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver.
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Related Experiment Video

Updated: Apr 4, 2026

Author Spotlight: Coproparasitoscopic Examination of Dog Stools for Control and Prevention of Zoonotic Parasite Diseases
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Diseases Transmitted by Man's Best Friend: The Dog.

Jerry Jacob1, Bennett Lorber1

  • 1Temple University Hospital, Section of Infectious Diseases, Philadelphia, PA 19140.

Microbiology Spectrum
|September 10, 2015
PubMed
Summary

Dogs can transmit various diseases and cause injuries like bites to humans. Understanding these risks and practicing preventative measures is crucial for public health, especially with millions of pet dogs in the US.

Area of Science:

  • Veterinary Medicine
  • Public Health
  • Zoonotic Diseases

Background:

  • Dogs are common companions, but can pose health risks to humans.
  • Millions of dog bites occur annually, with potential for infection.
  • Canine contact can transmit numerous pathogens, causing diverse illnesses.

Purpose of the Study:

  • To outline potential infectious diseases transmitted from dogs to humans.
  • To highlight the significance of zoonotic diseases from canine exposure.
  • To inform on preventative strategies against dog-associated illnesses.

Main Methods:

  • Review of existing literature on dog-related human illnesses.
  • Identification of common and severe pathogens transmissible from dogs.
  • Analysis of epidemiological data on dog bites and associated infections.

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Main Results:

  • Dog bites can lead to infections in up to 15% of cases.
  • Specific bacteria like Capnocytophaga canimorsus pose life-threatening risks, especially post-splenectomy.
  • Various other zoonotic diseases include ringworm, salmonellosis, leptospirosis, and Escherichia coli infections.

Conclusions:

  • Canine companionship necessitates awareness of zoonotic disease transmission.
  • Preventative measures are essential to minimize health risks associated with dog ownership.
  • Further research and public education are needed to manage dog-associated illnesses.