In 1970, the number of HMOs declined to fewer than 40. Paul M. Ellwood, Jr., often called the father of the HMO, began having discussions with what is today the U.S. Department of Health and Human Services that led to the enactment of the Health Maintenance Organization Act of 1973.
How is Nutrient Broth (microbiology) abbreviated? NB stands for Nutrient Broth (microbiology). NB is defined as Nutrient Broth (microbiology) very rarely.
&nbsp. A reductive infection that results in ongoing phage genome replication, as a prophage, and specifically does not involve virion production except following subsequent prophage induction. Contrast with productive infections where phage replication is coupled with virion production.