Occupational Hazards and Safety Issues

CHAPTER 21


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Occupational Hazards and Safety Issues




Many hazards exist in a veterinary practice, and each team member needs to be aware of all hazards. Every employee must be proactive and prevent hazards from occurring, keeping the facility safe for all team members, patients, and clients.


The Occupational Safety and Health Administration (OSHA) was developed in 1970 to ensure employee safety. Every employer must provide a safe working environment for all team members, and OSHA will severely penalize those that do not follow regulations. OSHA oversees all workplace hazards, including the safe use and disposal of chemicals. Each practice must have Material Safety Data Sheets (MSDSs) available for quick reference in case any team member is exposed to a chemical hazard. MSDS sheets give information regarding the chemical, specifications for cleanup and exposure, as well as any special properties the chemical possesses.


It is essential to prevent the transmission of zoonotic disease. Team members must be made aware of diseases that are transmissible to them and take all precautions necessary to prevent transmission. Zoonotic diseases can spread from animal to human and may spread by different methods depending on the disease. Some disease can be treated, whereas others may be fatal.


Safety plans must be developed in case of a fire or natural disaster, and all team members must be aware of the evacuation plans that have been developed. Team members, clients, and patients should all be accounted for when developing such plans. Fire inspections by the local fire department generally occur once a year, ensuring that businesses are in regulation with city ordinances regarding fire codes. Practices that are not up to code should make it a priority to ensure the safety of all involved with the practice.



ZOONOTIC DISEASES


Zoonoses are defined as diseases that may be directly or indirectly transmitted to humans from wild or domesticated animals. More than 1400 diseases are currently known to be zoonotic, of which 60% are caused by pathogens known to cross species lines. The need to educate the public and veterinary practice team members is imperative because veterinarians may be held liable for the transmission of such diseases. Veterinarians play a vital role in public health and control of zoonotic diseases (Table 21-1).



Table 21-1


Zoonotic Diseases






























































































































































































































































































































  Causative Organism Small-Animal Host Livestock Host Wildlife Host Mode of Transmission
BACTERIAL INFECTION
Anthrax Bacillus anthracis Dogs Cattle, sheep, horses, goats Most except primates Contact
Brucellosis Brucella melitensis Dogs Cattle, pigs, sheep, goats All except primates Contact, inhalation, ingestion
Campylobacteriosis Campylobacter fetus Dogs, cats Cattle, poultry, sheep, pigs Rodents, birds Ingestion, contact
Capnocytophaga infection Capnocytophaga canimorsus Dogs, cats     Bite wound
Cat scratch disease Bartonella henselae Cats   Cats Cat bite, scratch
Erysipelas Erysipelothrix rhusiopathiae   Pigs, sheep, cattle, horses, poultry Rodents Contact
Leptospirosis Leptospira spp. All All Rats, raccoons Contact with urine or birthing fluids
Lyme disease Borrelia burgdorferi Dogs, cats Cattle, horses Deer, birds, rodents Tick bite
Pasteurellosis Pasteurella multocida Dogs, cats   Bite wound  
Plague Yersinia pestis Cats   Rodents, rabbits Flea bite
Q fever Coxiella burnetii   Cattle, sheep, goats Birds, rabbits, rodents Inhalation, milk ingestion, contact
Rat bite fever Streptobacillus moniliformis     Rats Rat bite
Salmonellosis Salmonella spp. All All Rodents, reptiles Ingestion
Tetanus Clostridium tetani   Horses Reptiles Wound
Tuberculosis Mycobacteria tuberculosis Dogs, cats Cattle, pigs, sheep, goats, poultry All except rodents and monkeys Ingestion, inhalation
Tularemia Francisella tularensis All All except horses Rodents, rabbits Tick bite, contact with tissue
FUNGAL DISEASES
Cryptococcosis Cryptococcus neoformans     Birds Contact
Ringworm Trichophyton spp. Dogs, cats Cattle, horses, pigs, sheep Rodents Contact
PARASITIC INFECTION
Cryptosporidiosis Cryptosporidium parvum   Cattle   Ingestion
Hydatid disease Echinococcus Dogs Herbivores Wolves Ingestion
Larva migrans Toxocara, Ancylostoma, Strongyloides spp. Dogs, cats Pigs, cattle Raccoons Ingestion
Scabies Sarcoptes scabiei Dogs, cats, rodents Horses Primates Contact
Schistosomiasis Schistosoma Dogs, cats Pigs, cattle, horses Rodents Contact
Taeniasis cysticercosis Taenia   Pigs, cattle Boars Ingestion
Toxoplasmosis Toxoplasma gondii Cats Pigs, sheep, goats   Ingestion
Trichinosis Trichinella spiralis   Pigs Rats, bears, carnivores Ingestion
RICKETTSIAL DISEASES
Psittacosis Chlamydia psittaci Psittacine birds Ducks, turkeys Birds Inhalation
Rocky Mountain spotted fever Rickettsia rickettsii Dogs   Rodents, rabbits Tick bite
VIRAL DISEASES
Contagious ecthyma (orf) Poxvirus Dogs Sheep, goats   Contact
Encephalitis (EEE, WEE) Togavirus   Horses, poultry Birds, rodents Mosquito bite
Hantavirus Hantavirus     Rodents Contact
Lymphocytic choriomeningitis Arenavirus Mice     Varied
Monkeypox Orthopoxvirus     Rodents Contact
Newcastle disease Paramyxovirus Domestic birds Poultry Wild fowl Contact, inhalation
Rabies Rhabdovirus togavirus Almost all Most Most Animal bite
Simian herpes Herpesvirus simiae     Primates Animal bite, direct contact
Yellow fever Togavirus     Primates Mosquito bite
PROTOZOAL INFECTION
Balantidiasis Balantidium coli   Pigs Rats, primates Ingestion
Cryptosporidiosis Cryptosporidium spp. Most Calves, sheep Birds Ingestion
Giardiasis Giardia lamblia Dogs, cats Pigs, cattle Beavers, zoo monkeys Ingestion
Sarcocystosis Sarcocystis Dogs, cats Pigs, cattle   Ingestion
Toxoplasmosis Toxoplasma gondii Cats, rabbits, Guinea pigs Pigs, sheep, cattle, horses Cats Ingestion


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EEE, Eastern equine encephalitis; WEE, Western equine encephalitis.


Veterinarians are ethically required to educate the public about zoonotic diseases. Because public health has been addressed in the American Veterinary Medicine Association (AVMA) Code of Ethics, many state boards and regulatory agencies have mandated such education, which can leave many veterinarians liable for a malpractice suit. To present a claim for malpractice, four elements must be proven: existence of a valid client-patient relationship, failure to practice the standard level of care, proximate cause, and harm that occurred to the patient as a result of substandard care. For more information on malpractice, see Chapter 4.


Once a patient has been presented to a practice for treatment, a client-patient relationship has been established. Because veterinarians have been trained in the risks and transmission of zoonotic diseases, it has become the standard of care for them to educate the public. Therefore if a patient with a zoonotic disease is presented for treatment, it is the obligation of the veterinary practice not only to diagnose and treat it, but also to educate the client regarding the disease and to recommend that the client visit a physician to seek medical attention. If a patient has not been diagnosed with a zoonotic disease, it is standard of care to educate clients about potential zoonotic diseases that are present in the area and advise methods of prevention if available.


It is recommended that any new puppy or kitten brought to the practice be dewormed on the first visit. Puppies and kittens can easily transmit intestinal parasites, and this is the best opportunity to educate clients about these potential risks. If the veterinary practice initiates deworming protocols, sends home material for clients to read, and documents the procedure in the record, it has protected itself from a potential liability lawsuit.


If a practice educates a client about the risk of contracting a zoonotic disease and advises a treatment protocol to reduce the risk of contracting that disease and the client refuses the treatment, it must be documented in the record.


Team members should receive extensive training on zoonotic diseases and the precautions to take to decrease the possibility of transmission. Employees should sign a statement indicating that they have received prevention training. General cleanliness, handwashing, and the use of disinfectants are essential and must be implemented in every practice’s protocol to reduce transmission of disease.



DISEASE TRANSMISSION


The mode of disease transmission is important to understand when trying to prevent the spread of a disease. Reservoirs and hosts are also important to understand because these are necessary in the transmission of infectious diseases. A reservoir is a place where an infectious organism survives and replicates, such a within an animal or the soil. A host is a living organism that offers an environment for maintenance of the organism but that may not be required for the organism’s survival. Depending on the disease, the organism may be transmitted to more than one host or reservoir. Programs are generally aimed at reservoirs and hosts of diseases when control methods are being implemented.


Direct transmission of diseases requires close contact between the reservoir of the disease and the susceptible host. Contact with infected skin, mucous membranes, or droplets from the infected animal or human can cause disease. Soil or vegetation that is contaminated also serves as a method of direct transmission.


Indirect transmission of diseases is more complex and involves intermediaries that carry the agent of disease from one source to another. A vector is a living organism that transports infectious agents. A vehicle is a mode of transmission of an infectious agent from the reservoir to the host. Airborne transmission involves spread of the agent through dust particles or droplet particles over long distances.


Arthropods, such as fleas, ticks, and mosquitoes, are considered vectors. They can carry an infectious agent to a susceptible host as well as be involved in the multiplication of organisms. They can also assist in a specific stage of development of the organism.


Food and water are vehicles of indirect transmission of disease; both may be sources of bacterial, viral, and parasitic diseases. Foodborne diseases are acquired by the consumption of contaminated food or water and may be caused by toxins released by bacteria that are contained in the food. Parasites can also be transmitted through food, either through the ingestion of eggs or undercooked meat that contains cysts.



CONTROL OF ZOONOTIC DISEASES


Because of the contact veterinarians and veterinary technicians have with potentially infected pets, they may be the first to notice symptoms. It is important to recognize the most common diseases seen in a practice’s local area and be knowledgeable about their symptoms, treatments, and prevention. Prevention programs require complete knowledge of the disease and how it is maintained to break the cycle of the disease. Prevention of disease may be aided by a vaccination for such diseases, water filtration, and excellent hygiene skills.


People at particular risk of zoonotic disease are those with compromised immune systems, such as those undergoing chemotherapy and/or treatment for HIV or AIDS. Pregnant women and individuals who have had their spleens removed are also immunocompromised and should use extra precaution when working with or around animals with zoonotic potential. Children may also be at a higher risk because they come into contact with contaminants in the outdoor environment.



Animal Bites


Animal bites can be a source of infection, trauma, and zoonotic diseases. An animal bite is defined as a bite wound that penetrates the skin, causing bleeding and swelling at the area. Pasteurella is present in more than 50% of dog bite wounds and 90% of cat bite wounds. Other bacteria that may present in animal bites include Staphylococcus aureus, Staphylococcus epidermidis, Streptococcus spp., Bacteroides spp., Fusobacterium spp., and other gram-negative bacteria. In people, these bacteria can cause fever, septicemia, meningitis, endocarditis, and septic arthritis. Any team member who is bitten by a patient should wash the area well with warm, soapy water for at least 5 minutes, apply a dilute Betadine solution, then rinse with a strong stream of water. The team member should consider seeking medical attention, taking into account the potential risk for infection.



SAFETY HAZARDS IN THE VETERINARY PRACTICE


Each team member must practice safety while working in the practice. Many hazards exist, and everyone must be responsible for his or her own safety and prevention of injury. Moving equipment, slips, and lifting are a few causes of injuries that can be prevented. Team members should become diligent about washing their hands to prevent accidental ingestion of toxic substances as well as the spread of zoonotic diseases. Safety protocols must be developed and enforced; fire prevention, response, and rescues should be discussed among team members. Each person contributes a significant amount of time and energy to each practice, and each practice must protect these valuable team members.






Lifting


Team members must learn how to lift properly to prevent back injury (Figure 21-2). Lifting must always be done with the legs rather than the back; women are especially prone to use their backs. Team members should watch out for each other and guide others when lifting objects to ensure the back is kept straight and the legs are used to the maximum potential. It should be instituted that animals over 40 lb must be lifted by two team members to prevent back injuries.



Many people believe that they can lift animals very easily; they are strong and would never injure their backs. This is untrue; the second most common workplace hazard in veterinary medicine is a back injury. Most injuries occur over time, and prevention methods must be instilled in all employees to prevent injury.




Toxicities


There are many possibilities for toxic exposures in veterinary medicine. Chemical exposure can come in the form of cleaning supplies, chemotherapy, x-ray developer solutions, and medications that are dispensed or used in the hospital for patients.


The mixing of two or more chemicals can create caustic fumes that are harmful to both team members and patients. The fumes may not seem harmful, and at times may even smell good, such as combining bleach and a lemon disinfectant; however, prolonged exposure may be dangerous.



Every team member is exposed to chemotherapy agents (discussed in further detail later in this chapter) if they are administered in the veterinary practice. Many chemotherapeutic agents are expelled in the urine and feces of pets; therefore each time the animal eliminates in the cage, some of the drug is left behind. Therefore team members may be exposed to the drug unknowingly.


Radiology developer rooms should be ventilated to the outdoors because the chemicals used to develop radiographs are strong and harmful. If the developer and fixative mix for some reason, the chemical released can be caustic. The chemical used to develop radiographs can be poured down the drain, but the fixing solution must be collected by a specialized company because it can be damaging to the environment. This applies to both used and unused fixative.


It is often forgotten that when handling medication, excess drug powder and residual collects on the hands. Various types of medications are handled as team members count and dispense medications for owners or pull medications to treat patients. If team members do not wash their hands immediately after handling medications, they may ingest the substance or wipe it onto their faces. Many drugs appear to be safe, but repeated ingestion may not be safe. Some drugs are known to have side effects. Chloramphenicol, for example, may suppress bone marrow production in individuals who have a reaction to it. Unfortunately, this reaction is not known for months, or even years, after the exposure to the drug. It is essential that all team members wash their hands immediately after handling medication, just as hands are washed immediately after handling an animal, to prevent the accidental ingestion of medications.


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Oct 1, 2016 | Posted by in EXOTIC, WILD, ZOO | Comments Off on Occupational Hazards and Safety Issues

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