“…The different results in publications on serological testing of horse sera for anti-Leptospira antibodies can be explained, on one hand, by the fact that horses were exposed to different infection burdens, having lived in different geographic regions, countries, climatic zones, and environmental conditions and having been tested in different years. However, the MAT titer, which is considered "positive", also plays an essential role, being ≥1:50 [53,58], ≥1:100 [6,9,10,42,43,49,51,54,57,62,[81][82][83], ≥1:400 [80,[84][85][86] and even ≥1:800 [87] in different studies. Furthermore, different serovars were also used for MAT in different surveys.…”