That didn't take any great detective work – more people who were ill reported that they had eaten the oysters, which can be contaminated with human sewage, especially in the winter months.
(6) Finally, even consumables and cotton swabs can be contaminated with human DNA [15], [16], [17].
Decontamination of all reagents, including primers, is particularly important for forensic analyses and studies of ancient human remains where any reagent can be contaminated with human DNA.
Recombinant proteins can be produced in large quantities, are not likely to be contaminated with human pathogens and can be used in humans [10], [11], [12].
Using a primate specific SINE, AluY, we screened 2,749 non-primate public databases from NCBI, Ensembl, JGI, and UCSC and have found 492 to be contaminated with human sequence.
Water and High Purity Water (HPW) distribution systems can be contaminated with human pathogenic microorganisms.
Lindh leaned on a stick to stay upright, but slipped on a body at one point, falling and swallowing some water, which was contaminated with human remains and waste.
Nearly 20 percent of the nonhuman genomes held in computer databases are contaminated with human DNA, presumably from the researchers who prepared the samples, say scientists who chanced upon the finding while looking for a human virus.
The greatest microbial risks are associated with ingestion of water that is contaminated with human or animal feces (George et al. 2001).
Debra Martin of Hampshire College in Amherst, Massachusetts, says the fecal chunk could have been contaminated with human proteins during handling by scientists.
