Legends for illustrations on Food Safety lab home page: 
1. (background) Hepatitis A virus particles, transmission electron micrograph (diameter of particle is ~28 nm) 
2. Oocysts of Cryptosporidium parvum, stained with fluorescent antibody (these are 4-6 µ in their dimensions)
3. Oocysts of Cryptosporidium parvum, scanning electron micrograph 
4. Colonies of Salmonella Enteritidis (blue) to which a plasmid (BFP) has been added that codes for a protein that fluoresces blue under long wavelength UV; the other colonies (green) are Escherichia coli O157:H7 to which a plasmid (eGFP) has been added that codes for a protein that fluoresces green under long wavelength UV. 
5. Cyst of Giardia lamblia, scanning electron micrograph (size 8 × 12 µ)

 

6. Gel showing "fingerprinting" of Cryptosporidium parvum by randomly amplified polymorphic DNA ("RAPD") 
7. Virus plaques formed in the FrhK-4 cell line, stained with crystal violet from left: uninoculated culture, poliovirus 1 plaques after 5 days of incubation at 37 C; hepatitis A virus plaques after 16 days of incubation at 37 C 
8. Sporozoites of Cryptosporidium parvum, scanning electron micrograph 
9. Cells of the Madin-Darby Bovine Kidney cell line, stained with acridine orange and excited by UV 
  10. Quantitative spread plating of Salmonella enteritidis containing the BFP plasmid (cf. 4) 

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