Ruminants/food animal (French) Flashcards
In a heavily gravid cow the uterus displaces the rumen _______ and the abomasum ______.
Dorsally
Cranially
What prevents milk from entering the rumen in a suckling calf?
Esophageal groove
When is the rumen functional in a calf?
Once grain is introduced
For how long should you auscult the rumen?
2 minutes
What is the primary purpose of the primary rumen contraction? Secondary rumen contraction?
1- Mixing 2- Eructation (gas expulsion)
How is cud returned to the mouth from the reticulum for re-mastication?
Reverse peristalsis of the esophagus
T/F: A cow can ruminate while standing if she is leaning against a solid structure.
False, must lie down to ruminate/chew the cud
How is the strength of rumen contractions measured?
Observing/feeling movement, Auscultating the loudness of the sounds
How does hypocalcemia affect the primary rumination cycle?
Can cause hypomotility or atony (complete absence of reticuloruminal motility)
What is prevented when foam or fluid are in contact with the cardia?
Sphincter will remain close, not allowing for eructation
What is the purpose of chewing the cud?
Addition of bicarb allowing for further breakdown of food
From dorsal to ventral, what are the stratifications of the ruminal content?
Gas Fibrous mat Fluid Heaviest particles
What about the rumen can be assessed by internal palpation?
Volume and consistency of content
What is the most accurate method of rumen fluid examination?
Rumenocentesis
What is used to allow for the passage of an ororuminal tube?
Frick speculum
Why must you minimize exposure to cool temperatures, air and light to a sample of rumen fluid?
Exposure kills protozoa
If you need to transport a sample of ruminal fluid for a long distance, how do you need to secure it?
In a double jacket container
What is the normal color of rumen fluid in a cow that is fed mostly hay?
Olive to brownish-green
What does black/green rumen fluid indicate?
Ruminal stasis
What does milky rumen fluid indicate?
Lactic acidosis
What is the color of the ruminal fluid of a typical dairy cow? Why?
Yellowish Due to TMR feeding which contains lots of grain
What does a rotting odor of rumen fluid indicate?
Rumen putrefaction
What is the normal consistency of rumen fluid?
Slightly viscous
What does it indicate if rumen fluid is watery?
Anorexia
What does it indicate when a rumen fluid sedimentation activity test shows the sample sedimenting very rapidly (<3 min)?
Inactive micoflora (Ruminal acidosis)
What is the normal pH of rumen fluid from a dairy cow? What about a beef cow?
Dairy: >5.5-6 (TMR fed) Beef: 6-7 (Grass fed)
What does a rumen pH <5.5 indicate?
Lactic acidosis
What test is used to analyze anaerobic fermentation in the rumen?
Methylene blue reduction test
What test is used to analyze fiber digestion in the rumen?
Cellulose digestion test
What test is used to analyze carbohydrate digestion in the rumen?
Glucose fermentation test
What test is used to analyze protein digestion in the rumen?
Nitrate reduction test
How many protozoa per 40x field should you see when making a qualitative analysis of rumen fluid?
>40
What test is used to definitively diagnose a LDA? What is a positive result?
Liptak test (Abdominocentesis of abomasum) + = Acidic pH
What form of abomasal displacement is common after parturition?
Left
What are the 2 true cow emergency conditions (surgical)?
RDA Uterine prolapse
How many mammary glands does a cow have? Doe?
Cow- 4 Doe- 2