We totally wrapped up our core classes and final exams last Thursday, and after a long weekend with the boy's family I'm in the middle of my first week of selectives. I'm taking a week-long course in avian pathology with a few classmates and am having a loooot of fun! I don't mind microscope work at all, and it's really neat to be able to learn to recognize lesions and responses by cell type or distribution or the amount of fibrin. Pathology is this huge complicated puzzle, and I love getting introductions to it little by little before next year hits!
Monday and Tuesday our group worked through multiple histopathology cases where we had to identify the organ and bird response to the insult/injury with only a single microscope slide! Even though I haven't had a whole lot of practice with it before, I am actually learning a lot about what to look for and how to approach the histologic examination.
Today we all went on a field trip to a North Carolina poultry layer farm and worked on a current case using gross pathology techniques. The farm has been experiencing a decrease in egg production and a slight increase in mortality, and we were called in to examine the house and conduct some necropsies. We first did a walk-through of the houses to look for overall flock health and see how many were clearly sick or out of production (small combs, yellow legs, etc. on the females). Each of us then got to work on doing the necropsies of several birds from each house. Several of the recently deceased chickens were examined and in addition several of the sick birds from the houses were culled in order to more easily examine the population as a whole.
What'd we find?
- Most of the culled female birds were out of production and were not currently laying. These had small, regressed ovaries with tiny or no follicles left.
- Other females had hemorrhagic, congested ovaries and follicles.
- Egg shell strength and bone density were both low in multiple birds.
- Some birds had esophageal lesions and/or were off feed.
- Some retinal degeneration and spinal abscesses were observed.
- There was one hen with a really impressive cystic ovary (like, the cyst took up here entire abdomen) and several old, laminated yolks left over.
Overall, pretty cool day! It was really awesome to see the approach to a "mystery" case where clinicians are gathering evidence right at the location with very little previous information. It was also my first time at a large poultry facility, so that in and of itself was pretty amazing.
And after a long day like today, nothing is better than being able to come home and relax without having to think about studying. I love selectives!