Egg Decontamination
Egg Decontamination - Related Videos
06:19
Decontamination for Laboratory Biosafety
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2023
Robert M. Rioux and Zhifeng Chen, Pennsylvania State University, University Park, PA Decontamination is essential for laboratory biosafety, as the accumulation of microbial contamination in the laboratory can lead to the transmission of disease. The degree of decontamination can be classified as either disinfection or sterilization. Disinfection aims to eliminate all pathogenic microorganisms, with the exception of bacterial spores on lab surfaces or equipment. Sterilization, on the other hand,...
02:25
Egg Laying Assay: A Method to Quantify the Egg-Laying Behavior of C. elegans
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2023
C. elegans egg-laying behavior can provide important information in developmental, reproductive, and anatomical studies. This video introduces the important steps of an egg laying assay and shows a sample experiment in which a drug is tested for reproductive toxicity.
03:26
Drosophila Egg Collection and Dechorionation: A Method to Remove the Outermost Egg Layer
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2023
The Drosophila embryo is surrounded by protective outer membranes. To gain access to the embryo, the chorion–the outermost of the membranes–is often removed. This video describes a commonly used method of dechorionation using sodium hypochlorite. The example protocol demonstrates the procedure while employing sterile techniques necessary for axenic or gnotobiotic animal rearing.
05:08
Egg Windowing: A Method of Opening Fertilized Chicken Egg Shell to Expose Chorioallantoic Membrane Vasculature
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2023
In this video, we describe a technique to open the eggshell of a fertilized chicken egg to expose its chorioallantoic membrane or CAM carrying a network of branching blood vessels. The exposed CAM can be used for in ovo tumor modeling.
12:29
Upright Imaging of Drosophila Egg Chambers
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Cited by 1 •
2015
The upright imaging method described in this protocol allows for the detailed visualization of the poles of a developing Drosophila melanogaster egg. This end-on view provides a new perspective into the arrangements and morphologies of multiple cell types in the follicular epithelium.
FAQs
Shell pores can permit microorganisms to enter an embryonated egg, so treatment must reduce bacterial and fungal contamination without damaging the embryo. This balance is central to experimental validity: insufficient treatment can introduce confounding organisms, whereas overly harmful conditions may compromise the embryo or interfere with infection, propagation, and harvesting procedures.
Contact time is a controlled variable that helps ensure the disinfectant has an adequate opportunity to inactivate microorganisms on the eggshell. Because reliable decontamination depends on validated treatment conditions, inconsistent exposure may produce uneven microbial control. Standardizing this interval therefore supports reproducibility across viral inoculation and propagation experiments.
Shell treatment reduces microorganisms present on the exterior, but subsequent handling can still compromise the prepared egg if aseptic practices are not maintained. Keeping the post-treatment workflow aseptic helps preserve the reduction already achieved and limits microbial entry during procedures such as viral inoculation, incubation, and harvesting.
The workflow combines controlled surface cleaning, application of a validated disinfectant, maintenance of a controlled contact time, and aseptic handling afterward. Each stage contributes differently: cleaning prepares the shell surface, disinfection reduces or inactivates microorganisms, and aseptic technique helps prevent recontamination during experimental procedures.
It is especially important when embryonated chicken eggs are used for viral inoculation, pathogen growth, propagation, or harvesting. Reducing shell-associated bacterial and fungal contamination helps distinguish effects caused by the intended infectious agent from changes introduced by unwanted organisms, making infection experiments and related host-response studies more consistent.
Reliable treatment helps protect cultures from confounding bacteria and fungi while supporting reproducible pathogen growth and experimental handling. In immunology and infection research, that consistency is relevant to investigations of host responses and infection mechanisms. The same control also supports vaccine production workflows that use embryonated chicken eggs.