TY - JOUR AU - Daminelli, Paolo AU - Barrasso, Roberta AU - Dalzini, Elena AU - Cosciani Cunico, Elena AU - Zanardi, Giorgio AU - Bozzo, Giancarlo PY - 2020/12/10 Y2 - 2024/03/28 TI - Raw donkey milk versus raw cow’s milk. A preliminary study to compare the growth of Listeria monocytogenes and Staphylococcus aureus JF - Veterinaria Italiana JA - VetIt VL - 56 IS - 2 SE - Paper DO - 10.12834/VetIt.2140.13666.1 UR - https://veterinariaitaliana.izs.it/index.php/VetIt/article/view/2140 SP - AB - <p><span style="left: 326.102px; top: 525.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.950139);">Gram-positive foodborne pathogens such as </span><em><span style="left: 622.543px; top: 525.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.912726);">Listeria monocytogenes</span></em><span style="left: 767.664px; top: 525.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.918375);"> and </span><em><span style="left: 804.398px; top: 525.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.889722);">Staphylococcus </span><span style="left: 326.102px; top: 543.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.904);">aureus</span></em><span style="left: 366.781px; top: 543.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.89752);"> can grow in a wide variety of foods, including raw milk. The aim of the study was </span><span style="left: 326.102px; top: 561.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.92621);">to compare the growth of </span><em><span style="left: 498.384px; top: 561.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.891883);">L. monocytogenes</span></em><span style="left: 608.98px; top: 561.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.848625);"> and </span><em><span style="left: 642.928px; top: 561.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.822313);">S. aureus</span></em><span style="left: 698.025px; top: 561.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.922027);"> inoculated in donkey and cow </span><span style="left: 326.102px; top: 579.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.895249);">samples of raw milk during a storage time of 11 days at 8 °C. Moreover, the study aimed </span><span style="left: 326.102px; top: 597.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.935295);">to evaluate the influence of lactic acid bacteria (LAB) content on the growth of the two </span><span style="left: 326.102px; top: 615.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.988912);">microbiological populations considered. LAB content was lower in raw donkey milk than in </span><span style="left: 326.102px; top: 633.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.89294);">raw cow’s milk during the entire analyses; on the other hand, pH levels were higher in the </span><span style="left: 326.102px; top: 651.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.896893);">donkey milk rather than in the cow’s milk, although both values showed a decrease at the </span><span style="left: 326.102px; top: 669.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.854483);">day 11. </span><em><span style="left: 375.673px; top: 669.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.812799);">S. aureus</span></em><span style="left: 430.13px; top: 669.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.88511);"> showed no significant differences in the two types of milk. From day 0 to </span><span style="left: 326.102px; top: 687.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.942391);">11, </span><em><span style="left: 348.129px; top: 687.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.911375);">L. monocytogenes</span></em><span style="left: 457.493px; top: 687.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.952365);"> increased from 3.68 ± 0.02 log CFU/mL to 6.31 ± 0.07 log CFU/mL and </span><span style="left: 326.102px; top: 705.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.872611);">from 3.64 ± 0.04 log CFU/mL to 4.59 ± 1.04 log CFU/mL, in donkey milk and in cow’s milk, </span><span style="left: 326.102px; top: 723.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.962533);">respectively. Our results showed that donkey milk is a more favourable matrix to support the </span><span style="left: 326.102px; top: 741.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(1.00758);">growth of </span><em><span style="left: 390.587px; top: 741.302px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.908863);">L. monocytogenes</span></em><span style="left: 499.649px; top: 741.317px; font-size: 15px; font-family: sans-serif; transform: scaleX(0.949153);"> than cow’s milk.</span></p> ER -