A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Economic value
The net return within a herd for making a unit change in the trait in question.
EDEMA disease
Systemic illness of nursery pigs due to verotoxigenic E. coli.
Effluent
The liquid layer of manure after solids have settled out, such as in a lagoon.
ELISA
Enzyme linked immunosorbent assay
Emaciated
Excessive leanness, a wasted condition of the body.
Embryo
Any organism in its earliest stages of development.
Empty days
The number of days between weaning and conception.
Endemic
A disease of low morbidity that persists over a long period of time.
Endogenous prostaglandins
Prostaglandins that are produced by various tissues in the animal.
Energy-digestible
The proportion of energy in a feed that can be digested and absorbed by an animal.
Energy-metabolized
The total amount of energy in feed less the losses in feces, combustible gases, and urine. Also called available energy.
Energy-net
The amount of energy that remains after deducting from a feed´s total energy value the amount of energy lost in feces, urine, combustible gases, and heat increment. Sometimes called work of digestion.
Enteritis
Any inflammatory condition of the lining of the intestines of animals or people. Characteristics of enteritis are frequent evacuations of a liquid or very thin, foul-smelling stool that may or may not contain blood; a straining, lethargy, and anorexia. In acute cases, there is a rise in body temperature. The condition is seen as a symptom of a number of infectious diseases or it may be caused by specific bacteria or viruses. Other common causes include plant and animal poisons, parasites, overeating, faulty nutrition, and poor environmental factors.
Entry date
The date when a boar is first bred or a gilt is first mated.
Entry date (200-d-old rule)
The date when gilts automatically become sows after they reach 200 d of age.
Entry date (25-d arrival rule)
In Germany and France, the date when a gilt becomes a sow automatically if she remains in the herd for more than 25 d even if she has been mated.
Environment
1) All external (nongenetic) conditions that influence the reproduction, production and carcass merit of pigs 2) Physical and ambient condition in which the pig resides.
Enzootic Pneumonia
Pneumonia caused by Mycoplasma hyopneumoniae and secondary bacteria or viruses.
Equity
Net ownership of a business; the difference between the assets and liabilities of an individual or business as shown on the balance sheet or financial statement (assets - liabilities = owner equity).
Estimated breeding value (EBV)
An estimate of an individual´s true genetic worth for a trait based on the performance of the individual and close relatives for the trait.
Estradiol
Estradiol is one form of estrogen and is the most active estrogen in the female pig.
Estrous
Pertaining to estrus (heat) in animals.
Estrous Cycle
The combination of physiological events that begin at estrus and end at the next estrus.
Estrus
The period of sexual excitement (heat) and a certain hormonal profile, at which time the female will accept coitus with the male.
Euthanasia
The humane death of an animal occurring without pain or distress.
Event date
The date when an event occurs.
Exogenous prostaglandins
Prostaglandins that are either artificially produced or harvested and purified in a laboratory. These are typically injected into the animal. Any hormone that is given to the animal by injection or orally is considered exogenous.
Expected Progeny Difference (EPD)
The difference in performance to be expected from future progeny of a sire, compared with that expected from future progeny of the average animal in the same population. EPD is equal to 1/ 2 the EBV.
Exposure
The act of entering a boar into a group of breeding females.