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Related Concept Videos

Transmission of Pathogens01:24

Transmission of Pathogens

Pathogens spread from their reservoirs to susceptible hosts through three main routes: contact transmission, vehicle transmission, and vector transmission. Each route involves distinct mechanisms of transfer.Contact TransmissionThis category includes direct contact, indirect contact, and droplet transmission:Direct contact involves immediate physical interaction between individuals—such as a handshake—which can spread pathogens like Streptococcus pyogenes, the bacterium responsible for...

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Related Experiment Video

Updated: Jun 19, 2026

Nucleofection and In Vivo Propagation of Chicken Eimeria Parasites
08:26

Nucleofection and In Vivo Propagation of Chicken Eimeria Parasites

Published on: February 14, 2020

TRANSMISSION EXPERIMENTS WITH LEUCOSIS OF FOWLS.

E L Stubbs1, J Furth

  • 1School of Veterinary Medicine and The Henry Phipps Institute of the University of Pennsylvania, Philadelphia.

The Journal of Experimental Medicine
|October 30, 2009
PubMed
Summary
This summary is machine-generated.

Fowl leukemia is readily transmissible between chickens via injection. Controlled experiments confirmed that inoculated birds developed leukemia, while controls did not, demonstrating the infectious nature of the disease.

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Last Updated: Jun 19, 2026

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Published on: January 27, 2019

Area of Science:

  • Veterinary Medicine
  • Oncology
  • Pathology

Background:

  • Fowl leukemia is a significant concern in poultry farming.
  • Understanding transmission routes is crucial for disease control.

Purpose of the Study:

  • To investigate the transmissibility of fowl leukemia through blood injection.
  • To differentiate between injected and naturally occurring cases.

Main Methods:

  • Intravenous injection of blood from leukemia-affected chickens into healthy ones.
  • Comparison of inoculated birds with a control group under identical conditions.
  • Observation for leukemia development over 4-10 weeks.

Main Results:

  • 52% of inoculated chickens developed leukemia within 4-10 weeks.
  • Both erythroleucosis and myeloid leucosis were transmitted.
  • No leukemia cases were observed in the control group.

Conclusions:

  • Fowl leukemia is readily transmissible between chickens by injection.
  • The study provides evidence for the infectious etiology of certain types of fowl leukemia.
  • Controlled experiments are effective in demonstrating disease transmission.