Leptospirosis is a bacterial zoonosis with worldwide distribution. This disease is facilitated among stray dogs due to their lifestyle and the absence of immunoprophylaxis. The aim of the present study was to provide serological data on the presence of certain serovars of Leptospira spp., which are assumed to circulate in the population of stray dogs in Serbia. During a period of 3 years (from April 2010 to June 2013), 1045 canine sera originating from 11 shelters were submitted to the laboratory of the Department of Infectious Animal Diseases and Diseases of Bees, Faculty of Veterinary Medicine, Belgrade. A microscopic agglutination test (MAT) was performed to detect antibodies to Leptospira (cutoff, 1:100). The overall seroprevalence was 5.45% (57/1045) and the most prevalent Leptospira serovars were Icterohaemorrhagiae 33.3% (19/57), Pomona 29.8% (17/57), Canicola 14.0% (8/57), Grippotyphosa 3.5% (2/57), Bataviae 1.7 % (1/57), and Sejroe 1.7% (1/57). All dogs were seronegative for antibodies against serovars Australis and Bratislava. The results showed that stray dogs contribute to the spread and maintenance of Leptospira spp. in Serbia. Due to close contact with humans it is very important to improve the prevention of leptospirosis in dogs and support a One Health approach.

Abstract.Intensive cattle breeding involves a whole series of technological processes, which should allow continued production and optimal use of production capacities. In those conditions new born calves must adapt to different environmental factors, including diet and housing conditions. Diseases of digestive and respiratory organs are the most common health problems in calves during the irst months of their life. In this paper, we provide an overview of respiratory diseases of calves on a dairy farm. We monitored health status of calves on a dairy cow farm. Calves show clinical picture of respiratory diseases. In microbiological laboratory wide range of bacteria was isolated from calve lungs and nasal swabs. During one calendar year, the following bacteria were isolated from calve lungs: Pasteurella multocida, Mannheimia haemolytica, Pasteurella spp. Histophilus somni, Haemophilus spp, Trueperella (Arcanobacterium) pyogenes, Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, Salmonella Enteritidis, Salmonella Typhimurium. The total of 61 calves was diagnosed with respiratory diseases (34 male and 27 female calves). Number of dead male calves is 24 (16 male calves and 8 female calves). Calves with respiratory diseases were approximately 71.62 days old. Dead calves with pathomorphological changes on their lungs were approximately 77.25 days old. Diseases of calves on farms usually have multifactorial etiology, and the most important health disorders in calves on our farms were respiratory diseases. The occurrence of respiratory diseases is highly signi icant unfavorable result of microclimate conditions, hygienic accommodation and inadequate technological processes

Canine Monocytic Ehrlichiosis is a zoonotic bacterial disease with worldwide distribution. With regards to the population of stray dogs, the disease is facilitated due to their lifestyle and the lack of anti-parasitic protection. The aim of this study was to provide serological data on the presence of a specific Ehrlichia canis IgG antibodies in stray dogs, originating from 7 municipalities in Serbia. During the period from April 2013 to June 2014, 217 canine sera were submitted to the laboratory of the Department of Infectious Diseases of Animals and Bees, Faculty of Veterinary Medicine in Belgrade. An immunofluorescent antibody test (IFAT) was performed to detect antibodies to Ehrlichia canis (cut off, 1:50). Seropositive dogs were found in 5 out of 7 counties with a seroprevalence varying from 3.57% to 20% and an overall seroprevalence of 11.06% (24/217). There was no statistically significant difference between the prevalence of infection and the host age or gender. Results showed that stray dogs contribute to maintaining and spreading of Ehrlichia canis in Serbia. Due to the close relationship between people and dogs, it is of great importance to constantly monitor and improve prevention of this disease.

The concept of modern industrial production of pigs on commercial farms is based, among other things, on the implementation of biosecurity measures as well as solving problems of environmental protection, which greatly burden the production. It is well known that good health is a prerequisite for good pig reproduction, that is, a successful and profi table production. The health status of the herd depends on many factors such as the maintenance technology, nursing, nutrition, organization, level of staff training and systematic implementation of good health care policies. Today, we are witnessing high incidence of bacterial diseases, viral etiology and certain parasites that seriously aff ect the pig production in intensive farming conditions. Keeping such diseases under control is possible only by applying appropriate prophylactic and therapeutic measures, as well as by increased monitoring by professional services.

Production of good quality milk with proper biological characteristics is provided from milk udder in good health condition. This paper presents the results of examining the mammary glands of dairy cows in Branicevo district. Standard bacteriological methods were used for bacteriological isolation and identification of mastitis pathogens. The prevalence of mammary infection in the area was 2.14%. The most common cause of mastitis was Staphylococcus aureus. For proper prevention and treatment of mastitis, good hygiene measures should be undertaken during milking, ensuring proper equipment, good nutrition and effective treatment in the cases of udder diseases.