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    Identification and Antimicrobial Susceptibility of Subclinical Mastitis Pathogens Isolated from Hair Goats' Milk
    (MEDWELL ONLINE, 2009) Aydin, Ibrahim; Kav, Kursat; Celik, Haci Ahmet
    Aim of this study, was to identify the pathogens responsible for subclinical mastitis in hair goats and to determine their susceptibility to antimicrobial drugs. Total 700 milk samples from clinically healthy half udders of 350 lactating hair goats were collected and examined. The isolates were identified by conventional methods. Antibiotic susceptibility test was performed using disk diffusion method. Of the 700 milk samples examined, 60 (8.6%) were subclinically infected. Coagulase Negative Staphylococci (CNS), Streptococcus sp. and Staphylococcus aureus were the main species of microorganisms isolated. The CNS were the most common pathogen in this study with an prevalence of 50%. CNS were generally resistant to lactam antibiotics, while S. aureus and Streptococcus sp. were susceptible to lactams. Although, CNS and S. aureus were susceptible to aminoglycosides, fluoroquinolones, erythromycin, sulphamethoxazole/trimethoprim, lincomycin, oxytetracycline and florfenicol, Streptococcus sp. were susceptible, to lactams, aminoglycosides, sulphamethoxazole/trimethoprim, erythromycin, oxytetracycline and florfenicol. As results, it may be stated that antimicrobial drug susceptibility tests in subclinical mastitis of the hair goats should be done before the treatments.
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    SERUM OXIDATIVE STATUS AND ADENOSINE DEAMINASE ACTIVITY IN DOGS WITH TRANSMISSIBLE VENEREAL TUMOUR
    (NATL VETERINARY RESEARCH INST, 2009) Aydin, Ibrahim; Bulbul, Aziz; Avci, Gulcan Erbil; Celik, Haci Ahmet
    Ten adult healthy hitches and 10 bitches with transmissible venereal tumour were investigated. Scrum malondialdehyde, nitric oxide, antioxidant activity, vitamin C, retinol, beta-carotene, adenosine deaminase activity, oestradiol-17 beta. progesterone, and cortisol were determined. Oxidative damage and increased adenosine deaminase activity were (P<0.05) demonstrated in bitches with the tumour compared to healthy bitches. In conclusion, antioxidant supplementation may be useful in the treatment of bitches with transmissible venereal tumour.
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    Ultrasonographic evaluation of age related influence on the teat canal and the effect of this influence on milk yield in Brown Swiss cows
    (NATL VETERINARY RESEARCH INST, 2008) Celik, Haci Ahmet; Aydin, Ibrahim; Colak, Mehmet; Sendag, Sait; Dinc, Dursun Ali
    A total of 400 teat canals were investigated with a linear array ultrasound probe. The teat canal was observed as a hyperechogenic line at the tip of the teat. Twenty percent of the examined teat canals showed a crooked course, whereas in 80%, a linear course was observed. There was no statistically significant difference among teats of crooked teat canal and lateral aspects of teats. The mean length of teat canal was found to be 1 1.51 +/- 0.01 min. It was demonstrated that the length of the teat canal and milk yield were affected by the animals' age. The teat canals were the shortest in young cows and these cows showed the highest milk yield. On the other hand, older cows with the longest teat canals showed the least milk yield. It was concluded that the ultrasonographic examination was effective in teat canal imaging and morphological assessment. The observation of the location of the canal within teats and its course was essential.