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PHIL Image 10759
 
ID#:10759
Description:This 2008 photograph depicted a CDC microbiologist, as she was demonstrating how one properly “candles” an embyonated chicken egg, which employs a very bright light that is either placed behind the egg, such as was done throughout history by using a candle, hence the name, or employing more modern methods, using a powerful lamp placed against the broad end of the egg, as was the case here. In this way, the contents of the egg are revealed through the translucent shell. By using this procedure, she was able to access the viability of each egg used in the isolation of influenza viruses.

If the egg is unfertilized, as in PHIL 10147, the observer will see only a round yolk sac, and no developing embryo, or any network of blood vessels. Unfertilized eggs are known as “yolkers”. Eggs known as “quitters”, had been fertilized, but the embryo had stopped growing. In the case of quitters, one will note a thin blood ring encircling the yolk, as seen in PHIL 10148. “Winners” are eggs that had been fertilized, and lead to the growth of a healthy embryo, which is seen in PHIL 10149. In this case, one will observe numbers of networked blood vessels surrounding the yolk, and depending upon the length of gestation, one might see a dark shadow representing the developing embryonic eye.

High Resolution:Right click here and select "Save Target As..." for hi-resolution image (6.54 MB)
Content Providers(s):CDC/ Laura R. Zambuto
Creation Date:2008
Photo Credit:James Gathany
Links:
  • CDC - Coordinating Center for Infectious Diseases (CCID); National Center for Immunization and Respiratory Diseases, (NCIRD); Influenza Division; Viral Surveillance and Diagnostic Branch
  • CDC - Coordinating Center for Infectious Diseases (CCID); National Center for Immunization and Respiratory Diseases, (NCIRD); Influenza Division; Personal Protective Equipment (PPE) in Healthcare Settings
    Categories:
    CDC Organization
    tree picture Locations
    tree picture tree picture Atlanta (Ga.) Metropolitan Area
    tree picturetree picture tree picture Roybal Campus (Clifton Road)
    tree picture Organization 2004 present
    tree picture tree picture Coordinating Center for Infectious Diseases
    tree picturetree picture tree picture National Immunization Program

    MeSH
    tree picture Analytical, Diagnostic and Therapeutic Techniques and Equipment
    tree picture tree picture Investigative Techniques
    tree picturetree picture tree picture Clinical Laboratory Techniques
    tree picturetree picturetree picture tree picture Tissue Culture
    tree picturetree picturetree picturetree picture tree picture Cell Culture
    tree picture Diseases
    tree picture tree picture Respiratory Tract Diseases
    tree picturetree picture tree picture Respiratory Tract Infections
    tree picturetree picturetree picture tree picture Influenza
    tree picture tree picture Virus Diseases
    tree picturetree picture tree picture RNA Virus Infections
    tree picturetree picturetree picture tree picture Orthomyxoviridae Infections
    tree picturetree picturetree picturetree picture tree picture Influenza
    tree picture Organisms
    tree picture tree picture Viruses
    tree picturetree picture tree picture Vertebrate Viruses
    tree picturetree picturetree picture tree picture RNA Viruses
    tree picturetree picturetree picturetree picture tree picture Orthomyxoviridae
    Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.
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