Subclinical mastitis in dairy camels in Algeria: Comparison of screening tests

Acta agriculturae Slovenica

Aicha ADAIKA³  Leyla HADEF¹  Mohamed Said MAHMOUD²  Brahim HAMAD¹  Hebib AGGAD² 

[1] University of Tiaret and University El-Oued;University of Tiaret;University El-Oued

关键词: camels;    dromedaries;    Camelus dromedarius;    lactation;    subclinical mastitis;    screening tests;    indirect tests;    pH value;    electrical conductivity;    California Mastitis Test;    somatic cell count;    bacteriological test;   

DOI  :  10.14720/aas.2016.108.2.3

学科分类：农业科学（综合）

来源: Univerza v Ljubljani * Biotehniska Fakulteta / University of Ljubljana * Biotechnical Faculty

【 摘 要 】

The aim of the present study was to determine a threshold values and to assess the effectiveness of four indirect tests for the diagnosis of subclinical mastitis in dairy camels comparing with bacteriological culture. One hundred fifty three milk samples from 17 lactating camels were subjected to bacteriological culture, where 84 milk samples were positive, 47 were negative and 22 samples were considered as contaminated. A total of 131 milk samples were screened by pH, electrical conductivity (EC), California mastitis test (CMT) and somatic cell count (SCC). The good combination of sensitivity and specificity were obtained with a threshold of 6.55, 7.2 mS/cm, score trace was considered as CMT (+) and 240 000 cells/ml for the four tests, respectively. The sensitivity of the SCC, pH, EC and CMT was 72.61, 66.66, 47.61 and 39.28 %; the specificity 70.21, 38.02, 59.57 and 72.34 %; percentage accuracy 71.75, 51.14, 51.90 and 51.14 %; and positive predictive value 81.33, 47.61, 67.79 and 71.73 %, respectively. The SCC was significantly correlated with bacteriological culture (r = 0.415, p < 0.05). Kappa value of SCC was higher than that of other tests (SCC > CMT > EC > pH). In conclusion, the results suggest that the SCC was the most accurate, reliable, diagnostic method compared to other tests used in this study after cultural isolation for the detection of subclinical mastitis in dairy camel under field conditions.

【 授权许可】

Unknown