1 / 65

LATG: A Review of The Guide for the Care and Use of Laboratory Animals

LATG: A Review of The Guide for the Care and Use of Laboratory Animals. Created by Marc S. Hulin, DVM, Dipl. ACLAM. History of The Guide. First published in 1963; 6th revision Current revision was written by ILAR

domani
Download Presentation

LATG: A Review of The Guide for the Care and Use of Laboratory Animals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. LATG:A Review ofThe Guide for the Care and Use of Laboratory Animals Created by Marc S. Hulin, DVM, Dipl. ACLAM

  2. History of The Guide • First published in 1963; 6th revision • Current revision was written by ILAR • Purpose: assist institutions in caring for and using animals in ways judged to be scientifically, technically, and humanely appropriate • 6th edition was supported by NIH, USDA, and Dept. VA

  3. Introduction • Laboratory Animal: any vertebrate animal used in research, teaching or testing • Guide endorses: 9 US Government principles, AWA, PHS policy, other federal and state laws

  4. Evaluation Criteria • Performance standards preferred over Engineering standards • performance: define an outcome in detail and provide criteria for assessing the outcome, but don’t limit methods to achieve outcome • “Must”: considered imperative • “Should”: strong recommendation

  5. I. Institutional Policies and Responsibilities • IACUC membership: • DVM with lab animal experience • 1 practicing scientist with research experience with animals • 1 public member (non-affiliated) • Physical restraint: • use of manual or mechanical means to limit animal’s movement for examination, collection of samples, or drug administration

  6. Physical Restraint • Prolonged restraint should be avoided unless it is essential for research objectives and approved by IACUC • Guidelines: • not to be considered normal methods of housing • restraint period should be minimum time • animal should be trained • regular observations • veterinary care provided if lesions or illness

  7. Multiple Major Surgical Procedures • Major surgery: • penetrates and exposes a body cavity or produces substantial impairment of physical or physiologic function • Multiple major surgeries on a single animal are discouraged unless: • scientifically justified • approved by the IACUC • related components of a research project • conserve scare animal resources

  8. Food or Fluid Restriction • If experimental protocols require restriction at least minimal quantities of food and fluid should be available • Restriction for research purposes should be scientifically justified • Highly preferred food or fluid as positive reinforcement, instead of restriction, is recommended

  9. Veterinary Care • Adequate veterinary care must be provided, including access to all animals for evaluation of their health and well-being • Veterinarian must provide investigators with advice on use of sedatives, analgesics, or anesthetics in animals

  10. Personnel Qualification & Training • Personnel caring for animals should be appropriately trained and the institution should provide for formal or on-the-job training to facilitate effective implementation of the program and humane care and use of animals • Occupational Health and Safety program must be part of the overall animal care and use program

  11. Preventative Medicine for Personnel • Development and Implementation of a program for medical evaluation should involve input from trained health professionals • Cercopithecine Herpesvirus 1 (Herpes B virus): • personnel who work with Macaques should have access to and be instructed in the use of bite and scratch emergency kits

  12. Animal Environment, Housing, Management • Proper housing and management: • Animal well-being • Quality of research data • Health and safety of personnel • Animals should be housed with goal of maximizing species-specific behaviors and minimizing stress induced behavior

  13. Micro vs. Macroenvironment • Microenvironment: • physical environment immediately surrounding it, i.e. primary enclosure, food, wire bar lid, sipper tube. • Macroenvironment: • the physical environment of the secondary enclosure, such as a room, barn, or an outdoor habitat • Linked by ventilation between primary and secondary enclosure

  14. Primary Enclosures • Should be constructed with materials that balance the needs of the animal with the ability to provide sanitation • Solid-bottom caging, with bedding, is recommended for rodents

  15. Space Recommendations • Based on professional judgment and experience • Thigmotactic: rodent species benefit more from wall space (stay along the walls in cages) • Animal must have enough space to turn around and express normal postural adjustments • Social animals should be housed in pairs or groups

  16. Space Recommendations • Cage height: • Mice: 5 inches • Rats: 7 inches • Hamsters: 6 inches • Guinea pigs: 7 inches • Rabbits: 14 inches • Cats: 24 inches

  17. Space Recommendations • Floor space: • Dogs: • <15 kg: 8.o sq. ft. • 15-30 kg: 12.0 sq. ft. • > 30 kg: 24.0 sq. ft. • Monkeys: • Groups 1-7 (including baboons) • Apes (Pongidae): Groups 1-3 • Brachiating species cage height should be when fully extended, swing from cage ceiling without feet touching the floor

  18. Temperature and Humidity • Regulation of body temperature within normal variation is necessary for the well-being of lab animals • Relative humidity should be controlled to the acceptable range of 30-70%

  19. Dry Bulb Temperatures • Mouse, Rat, Hamster, Gerbil, Guinea Pig: • 64-790 F • Rabbit: • 61-720 F • Cat, Dog, NHP: • 64-840 F • Farm animals & Poultry: • 61-810 F

  20. Ventilation • Supply adequate oxygen; remove thermal loads caused by animals and equipment • Use of computer modeling for designing facility ventilation (computational fluid dynamics) • 10-15 fresh-air changes per hours for secondary enclosures is general standard • Recycled vs. Non-recycled air

  21. Illumination • Light can affect the physiology, morphology, and behavior of various animals • Lighting should provide sufficient illumination: • for well-being of the animals • allow good housekeeping practices • Time-controlled lighting system should be used to ensure a regular diurnal cycle

  22. Illumination • Light levels of 325 lux (30 ft-candles) about 1.0m above the floor appear to be sufficient for animal care and do not cause signs of phototoxic retinopathy in albino rats • Light at cage level for animal susceptible to phototoxic retinopathy should be between 130-325 lux

  23. Noise • Noisy animals (dogs, swine, etc.) should be housed away from quieter animals, such as rodents, rabbits, and cats • Noise >85 dB can have both auditory and non-auditory effects: • eosinopenia • increased adrenal weights in rodents • reduced fertility in rodents • increased blood pressure in NHP

  24. Behavioral Management • Structural Environment: • primary enclosure- cage complexities, cage furniture, manipulanda • Social Environment: • physical contact and communication with conspecifics (members of same species) • Activity: • animals should have opportunities to exhibit species-typical activity patterns

  25. Husbandry • Food: • unused, opened bags of food should be stored in vermin-proof containers • exposures to temp. > 700 F and humidity extremes hastens deterioration • dry lab animal diets stored for 6 months after manufacture • Vitamin C diets- 3 months shelf-life • Stabilized forms of Vitamin C extend shelf life

  26. Bedding • Untreated softwood shavings and chips are contraindicated may affect animals’ metabolism • Cedar shavings are not recommended, because microsomal enzymes and cytotoxicity • Soiled bedding should be removed and replaced with fresh materials as often as is necessary to keep the animals clean and dry

  27. Cleaning and Disinfection of Primary Enclosures • If animal waste is to be removed by flushing-at least once daily (animals kept dry during flushing) • enclosures and accessories (tops) should be sanitized at least once every 2 weeks • Solid-bottom caging, bottles, and sipper tubes usually require sanitization at least once a week

  28. Cleaning and Disinfection of Primary Enclosures • Effective disinfection can be achieved with wash & rinse water at 143-1800 F • Traditional 1800 F for rinse water refers to the water in the tank or sprayer manifold • A regularly scheduled and documented pest control and monitoring should be implemented

  29. Emergency, Weekend, and Holiday Care • Animals should be cared for by qualified personnel every day, including weekends and holidays • Emergency veterinary care should be available after work hrs., weekends, and holidays • A disaster plan that takes into account both personnel and animals should be prepared as part of the overall safety plan for the animal facility

  30. Identification and Records • Toe-clipping, for identification of small rodents: • only when no other method is feasible • performed only on altricial rodents • Clinical records for individual animals: • valuable for dogs, cats, NHP • contain pertinent clinical and diagnostic info. • dates of vaccinations, surgery, experimental use

  31. Veterinary Medical Care • Adequate veterinary care consists of effective programs for: • Preventative Medicine • Surveillance, Diagnosis, Treatment, and control of disease including Zoonosis • Management of protocol associated disease • Anesthesia and Analgesia • Surgery and Postsurgical care • Assessment of Animal Well-Being • Euthanasia

  32. Veterinary Medical Care • A veterinary care program is the responsibility of the attending veterinarian, who is certified or has training or experience in lab animal science and medicine • The veterinarian must provide guidance to investigators and all personnel involved in the care and use of animals

  33. Animal Procurement & Transportation • All animals must be acquired lawfully • Dogs and cats from Class B dealers should be carefully inspected for special identification markers • Importation of NHP is regulated by PHS with specific guidelines for Tuberculin testing

  34. Quarantine, Stabilization, and Separation • Effective quarantine program minimizes the chance for introduction pathogens into an established colony • Veterinary Medical staff should have procedures for evaluating the health and pathogen status of newly received animals

  35. Quarantine, Stabilization, and Separation • Effective quarantine program for NHP: • limit exposure of humans to zoonotic infections • filoviral and mycobacterial infections in NHP have necessitated specific handling guidelines (CDC) • Newly received animals should be given a period for physiologic, psychologic, and nutritional stabilization before their use.

  36. Quarantine, Stabilization, and Separation • Physical separation of animals by species is recommended to prevent interspecies disease transmission and conflict • separate rooms • cubicles • laminar-flow units • cages that have filtered air or separate ventilation • isolators

  37. Quarantine, Stabilization, and Separation • Examples of need for separate housing by species: • Bordetella bronchiseptica in rabbits- severe disease in guinea pigs • Simian Hemorrhagic Fever and SIV separate New World, Old World African, and Old World Asian • Squirrel monkey latently infected with Herpesvirus tamarinus which is fatal to Owl Monkeys

  38. Surveillance, Diagnosis, Etc. • All animals should be observed for signs of illness, injury, or abnormal behavior daily • Unexpected deaths and signs of illness should be reported promptly for appropriate veterinary medical care • The choice of medication or therapy should be made by the veterinarian in consultation with the investigator

  39. Surveillance, Diagnosis, Etc. • Infectious agents that affect research: • Sendai, KRV, MHV, LCMV, and Mycoplasma pulmonis • The principal method for detecting viral infections is serologic testing • Transplantable tumors, hybridomas, cell lines, and other biologic materials should be tested for murine viruses • MAP (mouse antibody production) test, RAP, HAP used for monitoring for viral contamination

  40. Surgery • Appropriate attention to presurgical planning, personnel training, aseptic and surgical technique • Use of antibiotics should never be considered as a replacement for aseptic procedures • PHS policy and AWA place responsibility with the IACUC for determining that personnel are qualified and trained for surgery

  41. Surgery • Major survival surgery: • penetrates and exposes a body cavity or produces substantial impairment of physical or physiologic function • laparotomy, thoracotomy, craniotomy, joint replacement, limb amputation

  42. Surgery • Minor survival surgery: • does not expose a body cavity and causes little or no physical impairment • wound suturing, peripheral-vessel cannulation, castration, prolapse repair, skin biopsy • most procedures routinely done on an “outpatient” basis in veterinary clinical practice

  43. Surgery • Nonsurvival surgery: • animal is euthanized before recovery from anesthesia • does not require aseptic surgery • surgical site should be clipped, wear gloves, and clean instruments • Skin sutures, wound clips, or staples: • must be removed in timely manner • Veterinary medical standard: 10-14 days

More Related