No abstract

Infectious arthritides in goats is mainly caused by mycoplasmas and Caprine ArthritisEncephalitis virus (CAEV). Streptococcus equi subspecies zooepidemicus (S. zooepidemicus) is a member of Lancefi eld group C beta-hemolytic streptococcus that commonly colonizes the mucous membranes of healthy equids which is also capable to induce different pathological conditions in many animal species. In this paper we described a case of polyarthritis in four Alpine goat-kids caused by S. zooepidemicus. Goat-kids originated from a farm where sheep, llamas, shepherd dogs, cows and horses were kept with goats. During the external examination of carcasses, crusts and discrete hyperemia were seen on the earlobes beneath the ear tag, as well as swollen joints. Necropsy fi ndings included severe fi brinous polyarthritis in all four examined kids. Shoulder, knee and hip joints were affected. From all affected joints S. zooepidemicus was isolated. Neither Mycoplasma spp. nor CAEV genome were detected from the affected joints. Most likely the goatkids were infected with S. zooepidemicus through the lesions on earlobes which were made after the tagging. As a possible source of bacteria, we recognized the horses and dogs. Due to the lack of any signs of illness in other animal species on the farm, as well as negative pathomorphological fi ndings in other organs, we assumed that the isolated strain is highly adapted to goat-kids. Our report is the fi rst described case of polyarthritis in goat-kids caused by S. zooepidemicus.

A retrospective study on 235 natural cases of Porcine Respiratory Disease Complex in order to determine the etiological agents, their prevalence and interrelationships was performed in Serbia. Lung tissue samples were analyzed by Polymerase Chain Reaction for the presence of Porcine circovirus type 2, Porcine reproductive and respiratory virus, Swine infl uenza virus, Mycoplasma hyopneumoniae, Pasteurella multocida, Actinobacillus pleuropneumoniae, Haemophilus parasuis, Streptococcus suis and Arcanobacterium pyogenes. A total of 49 different combinations of viral and bacterial pathogens were found. Five different viral and viral/Mhp co-infections were detected. Monobacterial infections were found in 150 cases and polybacterial infection was detected in 85 samples. PCV2 was the main virus detected, and Pm was the most aggressive secondary pathogen detected in PRDC. The reason for PRDC being so prevalent among Serbian pigs is most likely due to the large number of risk factors in the conventional farrow-to-fi nish system, compared to multisite production systems. Therefore, measures aimed at a better control of respiratory viruses, particularly Porcine circovirus type 2 and Porcine reproductive and respiratory virus, as well as Mycoplasma hyopneumoniae infections, and adoption of rational decisions on respiratory bacterial pathogens specifi c therapeutic and preventive strategies at herd level, simultaneously with signifi cant improvements on farm management should reduce the occurrence of PRDC.

Bacterial septicemia caused by motile aeromonads is common infection in the intensive fish production. Aeromonas (A.) hydrophila is often present in fish populations. Ubiquitous distribution of these bacteria in the aquatic environment, and the stress caused by intensive breeding are predisposing factors for the occurence of the disease. A. hydrophila is considered a major cause of septicaemia caused by motile aeromonads. Several A. hydrophila extracellular products (ECP) are considered as important factors in pathogenesis, primarily aerolysin (aerA), the extracellular lipase, cytolytic enterotoxin, hemolytic toxin and extracellular proteases. PCR detection of aerolysin (aerA) is considered a reliable method of identifying potentially pathogenic Aeromonas strains. In spring 2012, after a sudden increase in water temperature, disease occured in common carp population in one fish farm in Serbia. Five specimens of the one-year-old carp with clinical symptoms of motile aeromonas septicaemia were used for isolation of the bacteria. Identification of A. hydrophila was done on the basis of morphological, physiological, cultural and biochemical characteristics. PCR amplification of DNA from A. hydrophila isolates revealed presence of aerolysin (aerA) gene in all examined A. hydrophila isolates from carp with motile aeromonas septicaemia.