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This pilot study for Turkey consisted of two parts. In the first part of the study Animal Assisted Therapy (AAT) team visited nursing home residents once a week for six weeks. In the second part of the study, children with mental retardation visited the Uludag University Veterinary Faculty Farm once a week for six weeks and cooperated with AAT team. Salivary samples were taken before and after the 15 minute AAT sessions from participants. According to the results of this study except the last week of elderly group (p<0.05), there is no statistically significant change in both parts but it can be said that AAT applications decrease the stress levels of older adults and children with mental retardation and more research is needed in this area with large sample size. *Address for correspondence: Nazmiye Gunes Uludag University, Faculty of Veterinary Medicine, Department of Biochemistry Telephone: +90 224 2941282, Fax: +90 224 2941202, E-mail: ngunes@uludag.edu.tr INTRODUCTION During the twentieth century the proportion of older persons continued to rise and this trend is expected to continue into the twenty-first century. For example, the proportion of older persons was eight percent in 1950 and ten percent in 2000, and is projected to reach twenty-one percent in 2050. Such rapid growth will require far-reaching economic, social and health adjustments in most countries (Anonymous 2014a). Over the last two decades, the percentage of elderly persons in Turkey in relation with the rest of the world has increased. The considerable growth in the elderly population in Turkey has brought with it problems as well as concerns and represent a major challenge in setting new policies regarding these persons and their needs. Researchers have begun to recognize the importance of the human-animal bond for older adults (Anonymous 2013). This has led to a rise in the number of programs that use animals to improve the lives of nursing home residents. Pet attachment was found to be related to decreased levels of depressive symptoms among older adults. Researchers have begun to recognize the relaxing effect of pet attachment for older adults (Cherniack and Cherniack 2014; Ludqvist et al. 2017). On the other hand there are 1 million 100 thousand disabled children between the age of 4-18 in Turkey. Forty-five thousand of them have vision, 130 thousand of them have hearing, 500 thousand of them have mentally, 300 thousand of them have moving disablity. The education and social support for these children is insufficient (Anonymous 2014b) . Equine therapy is being used on a global scale with 650 centers in the United States to treat children with an array of disabilities (Lane 2007). In addition to the physical benefits of equine therapy, there are also social emotional and cognitive benefits that have been observed with increased self-esteem, confidence, and communication (Meregillano 2004). Mental retardation is also one of the areas of application of equine therapy. There are studies (Nepps et al. 2011; Yorke et al. 2013; Viau et al. 2010; Berry et al. 2012) focused on measurement of the AAT Ethno Med, 12(3): 184-188 (2018) DOI: 10.31901/24566772.2018/12.03.453 2018 © Kamla-Raj 2018 ANIMAL ASSISTED THERAPY 185 effects on different groups by using saliva cortisol. Cortisol is a glucocorticoid hormone, an important hormone secreted from the adrenal cortex. It is known that cortisol production has a circadian rhythm. Blood cortisol levels are the highest in the morning and evening is the lowest. Cortisol levels are also an indicator of the hypothalamic-pituitary-adrenal axis in living organisim. Cortisol hormone activates the immun system of the living organism against external adverse effects as a stress. It affects carbohydrate, lipid, protein metabolisms, nervous system, lymphoid tissues and kidneys. It elevates blood glucose, stimulates lipolysis, causes protein catabolism (Chernow 1987; Migeon and Lanes 1990; Fischbach 1992; Dorn et al. 2007). For these reasons, it is very important that the level of cortisol in organism to be kept at a certain limit. Based on this information, this hormone level is measured as an indicator of the stress conditions. However, taking blood to measure serum cortisol levels is a source of stress in life. Instead, cortisol levels are measured in saliva samples in recent years (Kalman and Grahn 2004). Studies have indicated that salivary cortisol levels reflect serum cortisol levels (Vining et al.1983; Yates et al. 2010). The cortisol level is independent of the circadian rhythm in case of stress (Kreiger 1975). Only one-fifteen percent of the cortisol level in the blood is biologically active. Other part of cortisol is bound to serum proteins about eightyfive percent. Unbound serum cortisol enters the saliva via intracellular mechanisms (Vining et al.1983; Vining and McGinley 1987). This is the first study to evaluate the effect of AAT practices on salivary cortisol levels in Turkey. The purpose of this study was to test the effectiveness of AAT in nursing home residents and children with mental retardation by using stress indicator cortizol and to lead and provide data for similar future studies. MATERIAL AND METHODS Study has originated from the Project named “Applications of Animal Assisted Therapies for Elderly People and Children” supported from Uludag University and Bursa Metropolitan Municipality Cooperation Protocol. 29.09.2010 (118371). Study consisted of two parts and conducted in Bursa Metropolitan Municipality Nursing Home and Uludag University Veterinary Faculty Farm. This study was approved by Uludag Clinical Research Ethics Committee of Uludag University School of Medicine (Dog Therapy 22 March 2011; Equine Therapy 28 August 2012), Bursa National Education Directorate and Bursa Governorship (2 October 2012 (44584). The informed consent of the participants were obtained. In the first part of the study, AAT team (5year-old female golden retriever and owner) visited nursing home residents once a week for six weeks. Salivary samples were taken before and after the 15 minute AAT sessions from participants (group size ranged weekly between 11 and 5) and control group. In the second part of the study, children with mental retardation aged 610 visited the Uludag University Veterinary Faculty Farm once a week for six weeks and cooperated with AAT team (10-15 years old horses and 4 adaptive therapeutic riding specialists). Salivary samples were taken before and after the 20 minutes AAT sessions from participants (group size ranged weekly between 10 and 7) and control group. Saliva was collected by oral care bar. Participants chewed this bar and then spit into a centrifuge tube. Tubes were centrifuged at 3000 rpm for 15 minutes and then bars were removed from the tubes and tubes were stored at -20 to-80C until the day of analysis. After collecting all samples, cortisol levels were evaluated by Salivary Cortizol Eliza Kit (Demeditec, Germany) . Nonparametric Two-related-samples tests and Wilcoxon test was used for comparisons between the pre and post measurement groups. All statistical analyses were performed using SPSS statistical program (Edition 22.0 SPSS Inc. Chicago IL, USA). All data are expressed as mean ± SE. A value of P<0.05 was considered significant.

The Effects of Animal Assisted Therapy Applications on Salivary Cortizol