Seroepidemiolodical study of Leptospira interrogans infection of cattle in North Algeria

Abstract

This work, a seroepidemiological study on the infection by L. interrogans was conducted in cattle farms of the area of Algiers. A total of 19 farms, randomly selected, were investigated and 205 cattle serums were collected and tested both by the MAT and ELISA to determine the prevalence and the antibodies's titer of the 5 specific studied serovars of L. interrogans, using 50% agglutination at a dilution ≥ 1: 100 as titre positivité. 29/205 (14.14%) animals were positive to one or more serovars. Leptospira serovar Harjo and Pomona were the most prevalent with 13 positive samples each (6.34%), followed by Canicola (4.39%) and Grippotyphosa (3.90 %). The less prevalent serovar was Icterohaemorrhagiae with only two positive samples (0.97 %). On the other hand, the seroprevalence of Leptospira interrogans serovar Hardjo was evaluated by two different kits of ELISA. A 4% and 5 % were obtained by ELISA Bio-X and PrioCHeck respectively. The study of various potential risk factors showed no statistical association with L.interrogans serovar Hardjo infection. We concluded from this study that Leptospira interrogans is present in cattle farms in the state of Algiers, Algeria.

Keywords

• cattle
• leptospira interrogans
• mat
• elisa
• risk factors