The effect of phytogenic additives on the degree of bacterial infection B. hyodysenteriae in weaned piglets
2021
Delić, Nikola | Nikšić, Dragan | Petričević, Maja | Stanojković, Aleksandar | Živković, Vladimir | Lazarević, Marina | Maksimović, Nevena | Škrbić, Zdenka
In this study, the average Ct values in 4 groups of piglets in a three - week time interval were examined. The groups consisted of 16 male piglets each. All four groups of piglets received a complete feed mixture that fully met the needs for a given category of animals (NRC, 2012). In addition to the mentioned mixture, one group was given the additive Patente Herba® (PH), the second group was given the food additive Patente Herba® Plus (PHP), the third group received the antibiotic thiamulin (Tiamulin - P - 10%) and presented a positive control (TK +), while the fourth group received only complete feed and represented a negative control (K-). The lowest average Ct value (i.e. the highest amount of DNA of the bacterium B. hyodysenteriae) in all four observed periods (first, second and third week of the experiment and in the entire, three-week experimental period) was recorded in the K-group. The highest mean Ct value (i.e. the lowest amount of B. hyodysenteriae DNA) on days 0 and 7 was in the PHP group, and on days 14 and 21 in the TK + group. The results of the analysis of variance indicated that the average Ct values between the groups did not differ statistically significantly on day 0 (F=2.48; p=0.070) or on day 7 (F=1.88; p=0.143), day14 (F=0.92; p=0.439) and 21 (F=0.64; p=0.593). Since for the 14th and 21st day the values of F statistics were less than 1, it means that the data in the groups differed more than between the groups, and in the groups themselves the variability was not manifested (cv≤30%).
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