apsc livestovk handling class nites on estrus synchronization

Initial Question: Injection administered to heifers discussed in class, related to quiz material.
- Specific focus on Leptospirosis vaccination and its purpose.
- Purpose of Leptospirosis vaccine: To prevent abortion in cattle.
Additional Vaccines: Other vaccines mentioned that can cause abortion:
  - BRSV (Bovine Respiratory Syncytial Virus)
  - IBR (Infectious Bovine Rhinotracheitis)
  - PI3 (Parainfluenza Virus type 3)
  - BVD (Bovine Viral Diarrhea)
Vaccine Nature: Recognizing the distinction between biological (produces antibodies) and pharmaceutical (medicinal). All vaccines are classified as biological.
- Example of a biological injection: Nasalgen.

Encouragement for students to evaluate their experience in the class and the teaching assistants (TAs).
- Feedback collected weeks after submission; anonymity is implied.

Device Introduction: Discussion of implant gun with a focus on its components.
  - Specific example: Ralgro gun.
    - Ralgro: Used for growth implants.
      - Contains active ingredient Zerenol from moldy corn.
      - Targets efficiency in growth of cattle by promoting average daily gain, estimated between $0.10 - $0.30 per head per day.
Delivery Route: Growth implants are injected into the ear for effective blood circulation and prolonged release (lasting approximately 100 days).
Industry Context: Current pricing of beef cattle in the market can reach up to $6.00 per pound for lighter weights, driving the importance of efficient growth.

Pelvis Specimen: Discussion regarding a genuine bovine pelvis received from a local veterinarian.
Anatomical Features:
  - Description of the pelvic floor’s structure and significance in calving.
  - Recognition of important bones in cattle:
    - Ileum (Hooks): Higher area that contributes to pelvic structure.
    - Ischium (Pins): Lower area related to the pelvic structure.
Measurement: Pelvic measurements are crucial for assessing breeding potential in virgin heifers.
- Cut-off Measurement: Industry standard cutoff for breeding capability is 150 square centimeters.

Introduction of CIDR (Controlled Internal Drug Release) as a tool for estrus synchronization.
- Hormone: Progesterone is the key hormone released by the CIDR.
Injection Protocol: Use of other hormones such as Cystarella to stimulate follicular waves in cattle for synchronized breeding.
Seasonal Breeding: Highlights the strategy of synchronizing heat so that all cows breed around the same time.
- Example of field operation management with synchronization allows for more efficient labor management during breeding season.

Drug Dosage Calculation:
- Example with LA-200 (oxytetracycline) for treating pink eye in cattle.
- Dosage format: 4.5 cc per 100 pounds of body weight example explained; calculation of exact dosage for a specified weight.
On supplementation: Estimation of medication dosage in crumbles to treat respiratory diseases like pneumonia in weaned calves using Oro-Micin crumbles.
Adjustments for Water-Administered Drugs:
- Emphasis on careful measurement in water tanks rather than mixing directly in drinking troughs due to variability in consumption.

Discussion of the current beef market cycle and inventory observations, including high prices due to low inventory.
Stocker Definition: Explanation of stocker cattle as animals destined for growth before entering feedlots for further fattening.
Feeding Practices: Importance of managing feeding practices for profitability and health benefits.
Effective Networking: Upcoming Beef Cattle University event, details about participation for students and professionals to improve connections in the field.