Bulletin of Animal Health and Production in Africa

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Application of microagglutination test for detection of antibodies to Salmonella gallinarum in commercial layer chickens

Application du test de microagglutination pour la detection des anticorps a Salmonella gallinarum chez les pondeuses commerciales

PN Wambura, HG Makuri, AS Hoza, H Tuntufye, LSB Mellau


In this study a microagglutination test (MAT) was developed, evaluated and compared with a rapid whole-blood agglutination test (RWBAT) for detection of Salmonella gallinarum antibodies in commercial layer chickens in Morogoro, Tanzania. The results showed that at Kigurunyembe farm, 16 (32%) of chicken tested were RWBAT positive while 30 (60%) were MAT positive among the 50 sera tested. Results from Kilakala farm revealed 10 (20%) sera that were RWBAT positive whereas 5 (10%) were positive for MAT among the 50 sera tested. On both farms, S. gallinarum was isolated from 21 chickens. The sensitivities, specificities, positive and negative predictive values for MAT were 57, 71, 34 and 86%, respectively, and 67, 85, 54 and 82 %, respectively for RWBAT. Although MAT was slightly less sensitive and less specific than RWBAT, it revealed a higher true seroprevalence (35%) of fowl typhoid than RWBAT (26%). When the test is optimized it may be preferred because it uses less time, space and antigen while permitting more objective evaluation of antibody titers. Higher growth and seroprevalence of S. gallinarum was observed in Rhode Island Red than Black Australop chickens.

Keywords: chickens, microagglutination test, Salmonella gallinarum, seroprevalence, whole blood agglutination test

Bulletin of Animal Health and Production in Africa Vol. 54(2) 2006: 124-130
AJOL African Journals Online