Pain and suffering in animals

The perception of pain stimuli by nociceptors and their conduction to the diencephalon are approximately identical processes in higher animals and in man. There are however differences between man and animal as well as between the species of animals concerning mental processing and assessing of pain. The importance of fear must be taken into regard. At the moment a scientific assessment of pain and suffering in animals is not possible.     

Euthanasia & thanatology in small animals

The study of thanatology has recently taken on increased importance in the field of veterinary medicine. Today, the roles of companion animals have expanded to include beloved pet and family member, provider of social and emotion support, and in the case of service dogs, provider of assistance to owners with special needs. For these reasons, companion animals have taken on greater significance within their human families. Their deaths can be as painful and difficult for their families as the death of human family members. Veterinarians are tasked with working in concert with the pet owner, throughout the lifetime of the pet, to promote the pet’s health and well-being. In critical and or terminal situations, it is the veterinarian’s role to educate the owner so that informed decisions regarding treatment options or a decision to euthanize the pet can take place. In veterinary medicine, euthanasia means to end life painlessly. Veterinarians and owners, working in partnership to make subjective and objective assessments on the pets quality of life, produce the best results. For the veterinarian, the medical approach (including: clinical history, physical exam, laboratory tests, diagnosis, prognosis and treatment) can assist in assessing the pet’s physical health status, any potential treatments, and the likely short and long term outcomes. The owner’s role in the partnership is to subjectively assess overall behavioral changes and the pet’s quality of life. Once owners have decided to euthanize their pet, there are still more factors to consider: where to perform the procedure, which family members will be present, and how the remains will be handled. The veterinarian can do everything possible to minimize any anxiety for the pet during the euthanasia, including administration of a tranquilizer prior to the procedure. The veterinarian will allow the pet’s family time to say goodbye and educate them on what to expect when their pet dies. There is a possibility that other pets that lived in the same household may also experience distress at the loss of their animal family member. The veterinarian can let the owners know what signs may be signaling depression or anxiety in that pet. The grieving process is extremely personal and people must be allowed to grieve in the way that helps them deal with their loss. Veterinarians need to be careful not to minimize the owner’s loss or grief. The owner will count on the veterinarian’s guidance and expertise when making decisions affecting their pet’s well-being. Making an informed decision can help assuage any guilt about opting for euthanasia when done in the best interest of the pet.     

小肽营养及其在养猪生产中的应用

由2￣10个氨基酸通过肽键形成的肽称为小肽(寡肽)。小肽组合形式多种多样,仅二肽就有400多种,三肽有8000多种,四肽有160000余种。早在1921年就有人提出了小肽完整转运的可能性,但由于人们受传统蛋白质消化吸收理论的影响,对小肽完整吸收的方式难以接受(郑学斌等,2004)[1]。Newa     

Genetic diversity studies in farm animals – a survey

During the past decade a large number of genetic diversity studies in domestic livestock based on microsatellite loci was carried out all over the world. A survey among research groups reveals that in 50% of 87 projects more than eight breeds are investigated. Breeds are chosen mainly because of their long history of isolation, unique phenotypic qualities or an evolution within a unique environment. In half of the projects the average planned sample size per breed is higher than 50. Small ruminants are investigated in the majority of projects. The most preferred type of sample is blood and the most preferred markers are microsatellite loci. To combine results from different diversity studies, the adherence to recommendations, e.g. which loci to genotype or required sample sizes per breed, is necessary. The so called International Society for Animal Genetics (ISAG)/FAO recommendations, which were developed for that purpose, are well known, but the use of recommended microsatellite loci varies between species. The highest acceptance was found in pig, and the lowest in chicken.     

Case–control study of Staphylococcus lugdunensis infection isolates from small companion animals

Background – Coagulase‐negative Staphylococcus lugdunensis has recently been shown to cause invasive infections of people, which are similar in pathogenic effect to those caused by Staphylococcus aureus. Little is known about the pathogenicity of S. lugdunensis in companion animals. Objectives – To compare potential risk factors for infection, body sites affected, and whether cases and controls had been treated with antimicrobial drugs based upon susceptibility test results. Animals – Thirty‐three cases of S. lugdunensis infection (25 dogs, six cats and two small mammals) were identified between January 2003 and August 2011. Two Staphylococcus pseudintermedius controls, which were identified by the microbiology laboratory immediately before and after each S. lugdunensis case, were host‐species matched to each case. Methods – A retrospective case–control analysis. Results – During the period evaluated, the prevalence of S. lugdunensis infection was 1.3 cases per 10,000 hospital admissions for dogs and 0.95 cases per 10,000 admissions for cats (P = 0.453). In univariate analyses, S. pseudintermedius isolation was significantly associated with skin infections (P < 0.0001), while S. lugdunensis isolation was associated with the respiratory tract (P = 0.03) and other deep tissues (P = 0.005). Cases were less likely than controls to have been treated based upon susceptibility test results (P = 0.02). A conditional logistic regression analysis showed isolation of S. lugdunensis to be associated with recent (≤ 30 days) steroid administration (odds ratio, 17.72; 95% confidence interval, 2.35–132.82; P = 0.005); and in‐patient status (odds ratio, 9.67; 95% confidence interval, 2.18–42.88; P = 0.003). Conclusions – These results suggest that S. lugdunensis may cause invasive infections in companion animals, which should be treated with antimicrobials based upon susceptibility tests when available.     

Pain management in horses and farm animals

Objective: This review discusses the different analgesic drugs and routes of administration used in large animals for acute pain management. General guidelines and doses are given to assist in choosing techniques that provide effective analgesia. Etiology: Noxious stimuli are perceived, recognized, and localized by specialized sensory systems located at spinal and supraspinal levels. Diagnosis: Localizing the source of the noxious stimulus as well as understanding the behavioral aspects and physiological changes that result from such insult is important to adequately diagnose and treat pain. Pain assessment is far from being definite and objective; not only are there species differences, but also individual variation. In addition, the behavioral and physiological manifestations vary with the acute or chronic nature of pain. Therapy: Pain management should include (1) selecting drugs that better control the type of pain elicited by the insult; (2) selecting techniques of analgesic drug administration that act on pathways or anatomical locations where the nociceptive information is being processed or originating from; (3) combining analgesic drugs that act on different pain pathways; and (4) provide the best possible comfort for the animal. Prognosis: Providing pain relief improves the animal's well being and outcome; however, interpreting and diagnosing pain remains difficult. Continuing research in pain management will contribute to the evaluation of the pathophysiology of pain, pain assessment, and newer analgesic drugs and techniques.     

Hypoadrenocorticism in small animals

The diagnosis and treatment of hypoadrenocorticism can be one of the greatest challenges faced by veterinary practitioners, as Addison's disease may have many faces and many presentations. Although the disease is most often diagnosed in dogs, cats may also suffer from Addison's disease. The practitioner must have a high index of suspicion to make a diagnosis of hypoadrenocorticism. This index of suspicion is based on knowledge of the common signalment, history, physical examination, and laboratory findings. Diagnosis of hypoadrenocorticism is supported by appropriate choice of diagnostic endocrine tests that are described in detail in this article. Once a diagnosis of hypoadrenocorticism has been made, expedient treatment is of foremost concern. Timely treatment using fluids, corticosteroids, and supportive care will ensure a successful outcome; the emergency treatment of Addison's is covered briefly in this article and fully in another article in this issue. The purpose of this review was to describe the clinical diagnosis and chronic treatment of hypoadrenocorticism in dogs and cats.     

Rabies in small animals

Rabies in small animals has been dramatically reduced in the United States since the introduction of rabies vaccination of domestic animals in the 1940s. As a consequence, the number of human rabies cases has declined to only a couple per year. During the past several years, the dog rabies variant has almost disappeared completely. Rabies in wildlife has skyrocketed, however. Each wildlife species carries its own rabies variant(s). These wildlife epizootics present a constant public health threat in addition to the danger of reintroducing rabies to domestic animals. Vaccination is the key to prevent rabies in small animals and rabies transmission to human beings.     

Salmonella serovars and phage types in humans and animals in Australia 1987–1992

SUMMARY This report summarises the range of Salmonella serovars and phage types found in humans in Australia during the years 1987 to 1992 inclusive, and compares them with serovars from food animals and raw meats for the same period. It also compares the major serovars found from different animal sources with their frequency from humans. The common serovars from animal feeds are compared with their frequency from animals.