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1An amber-coloured, protein-rich liquid which separates out when blood coagulates.‘the researchers examined blood serum obtained from 471 men and women’count noun ‘sera were stored at −20°C until tested’
- ‘Normal human sera were obtained from healthy individuals.’
- ‘Blood products, sera, sperm, oocytes and embryos are not included.’
- ‘Blood was withdrawn from the carotid artery and the sera were separated for each study.’
- ‘So far, Herman has tested his hypoallergenic soybean with human sera and in sensitive animals.’
- ‘The sera used in this study correspond to bleeds obtained after four boosts with the same antigen.’
- ‘The sera were stored at - 20°C without any preservative.’
- ‘No staining was detected when the preimmune serum was used as a negative control.’
- ‘Controls included omitting the primary antibody, using control rabbit serum as primary antibody, and omitting the secondary antibody.’
- ‘The number of sera from patients whose blood culture grew B. psuedomallei is only 12.’
- ‘Furthermore, antibodies to the region II domain of the protein are commonly detected in sera from individuals in endemic populations.’
- ‘The preimmune serum was collected 1 week before the first inoculation.’
- ‘The percentage antibody prevalence was calculated using the ratio of positive sera to the total sera tested in each age group.’
- ‘Blood samples were then obtained and sera tested for HIV and hepatitis.’
- ‘The femoral marrow cells were flushed out with fetal bovine serum and smeared on clean slides.’
- ‘Earlier studies found that pregnant pigs vaccinated against bacterial intimin developed antibodies against it in their sera and colostrum.’
- ‘The test liquid was said to approximate the surface tension of human serum.’
- ‘Acute and convalescent sera were obtained 4 weeks apart.’
- ‘Pooled control sera had been collected from 321 adults positive to a few molds/microbes.’
- ‘I took those sera down to Melbourne with me and tested them to see if any of them had antibody to this newly discovered tick typhus organism.’
2The blood serum of an animal used to provide immunity to a pathogen or toxin by inoculation or as a diagnostic agent.‘doctors treated the bites of carpet vipers with serum produced from local snakes’
- ‘You could be making a fortune out of the drugs, serums and surgical hardware, and yet you have to stand on the sidelines and watch as US drug companies make a killing.’
- ‘He was given a cocktail of vaccines within 10 minutes including anti-plague and anthrax serums.’
Late 17th century: from Latin, literally ‘whey’.
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