By Dr. Harold Hafs
At first glance, a sperm (Animal Science Image Gallery #5140, shown below) appears to be a relatively simple cell. Upon closer examination, however, Dick Saacke observed some subtle differences among sperm. For example, sperm from bull 1 (upper left in #5140) have longer heads than those from bull 2 (upper right in #5140). In other words, these two bulls had morphologically distinctive heads that could be identified even when sperm from the two bulls was mixed as in the lower two photos in #5140. These kinds of anatomical differences affect fertility, because they are associated with differences in the ability of sperm to penetrate an ovum. Read more
April 16, 2015 – The 2015 Joint Annual Meeting Program Committee is calling for late-breaking abstracts of original research that highlight a broad spectrum of work, including cutting-edge, high-tech research that was completed recently and is important to the species or discipline. The submission deadline is 11:59 p.m. (CDT) on May 22, 2015. Read more
April 16, 2015 - Antimicrobial resistance in Salmonella isolated from retail meat continues to decline, according to reports released this week by the U.S. Food and Drug Administration (FDA).
The reports measure antimicrobial resistance in certain bacteria isolated from raw meat and poultry collected through the National Antimicrobial Resistance Monitoring System (NARMS). The reports include the 2012 Retail Meat Annual Report and the 2013 Retail Meat Interim Report. Read more