Vande Pol Katherine D, Tolosa Andres F, Bautista Raphael O, Willard Naomi C, Gates Richard S, Shull Caleb M, Brown Catherine B, Alencar Stephan A S, Lents Clay A, Ellis Michael
Department of Animal Sciences, University of Illinois, Urbana-Champaign, IL 61801, USA.
Department of Agricultural and Biological Engineering, University of Illinois, Urbana-Champaign, IL 61801, USA.
Transl Anim Sci. 2021 May 31;5(3):txab095. doi: 10.1093/tas/txab095. eCollection 2021 Jul.
Neonatal piglets can experience both a decrease in body temperature and hypoxia, increasing risks for pre-weaning mortality. This research evaluated the effects of drying and providing supplemental oxygen to newborn piglets on rectal temperature (RT) over the first 24 h after birth. The study used a CRD with three Intervention Treatments (IT; applied at birth): Control (no intervention), Drying (dried using a desiccant), Oxygen [dried using a desiccant and placed in a chamber (at 40% oxygen concentration) for 20 min]. A total of 42 litters (485 piglets) were randomly allotted to treatments at the start of farrowing. At birth, each piglet was given a numbered ear tag, weighed, and the treatment was applied; RT was measured at 0, 20, 30, 45, 60, 120, and 1440 min after birth. Blood was collected from one piglet from each birth weight quartile within each litter at 24 h after birth to measure plasma immunocrit concentration. There was no effect ( > 0.05) of IT on piglet RT at 0 or 1440 min after birth. Between 20 and 60 min after birth, piglet RT was lower ( ≤ 0.05) for the Control than the Drying treatment, with the Oxygen treatment being intermediate and different ( ≤ 0.05) from the other two IT. The effect of piglet birth weight on responses to IT were evaluated by classifying piglets into Birth Weight Categories (BWC): Light (<1.0 kg), Medium (1.0 to 1.5 kg), or Heavy (>1.5 kg). There were IT by BWC interactions ( ≤ 0.05) for piglet RT at all measurement times between 20 and 120 min after birth. Relative to the Control, the effects of the Drying and Oxygen treatments on RT were greater ( ≤ 0.05) for Light than heavier piglets. Plasma immunocrit concentrations tended ( = 0.07) to be greater for piglets on the Control treatment compared to the other two IT and were lower ( ≤ 0.05) for Light than Heavy piglets, with Medium piglets being intermediate and different ( ≤ 0.05) to the other BWC. In conclusion, drying piglets at birth reduced the extent and duration of RT decline in piglets in the early postnatal period compared to undried piglets, especially for those of low birth weight. However, the combination of drying and placing piglets in an oxygen-rich environment provided no additional benefit over drying alone.
新生仔猪可能会经历体温下降和缺氧的情况，这增加了断奶前死亡的风险。本研究评估了对新生仔猪进行擦干和补充氧气对出生后最初24小时内直肠温度（RT）的影响。该研究采用完全随机设计，设有三种干预处理（IT；出生时应用）：对照组（无干预）、擦干组（用干燥剂擦干）、氧气组[用干燥剂擦干并置于舱内（氧气浓度为40%）20分钟]。在分娩开始时，将总共42窝（485头仔猪）随机分配到各处理组。出生时，给每头仔猪佩戴编号耳标、称重并进行相应处理；在出生后0、20、30、45、60、120和1440分钟测量直肠温度。在出生后24小时，从每窝中每个出生体重四分位数的一头仔猪采集血液，以测量血浆免疫比容浓度。干预处理对出生后0或1440分钟时仔猪的直肠温度没有影响（P>0.05）。在出生后20至60分钟之间，对照组仔猪的直肠温度低于擦干组（P≤0.05），氧气组处于中间水平且与其他两种干预处理不同（P≤0.05）。通过将仔猪分为出生体重类别（BWC）：轻体重（<1.0千克）、中等体重（1.0至1.5千克）或重体重（>1.5千克），评估了仔猪出生体重对干预处理反应的影响。在出生后20至120分钟之间的所有测量时间点，仔猪直肠温度存在干预处理与出生体重类别的交互作用（P≤0.05）。相对于对照组，擦干和氧气处理对轻体重仔猪直肠温度的影响比重体重仔猪更大（P≤0.05）。与其他两种干预处理相比，对照组仔猪的血浆免疫比容浓度有升高趋势（P=0.07），轻体重仔猪低于重体重仔猪（P≤0.05），中等体重仔猪处于中间水平且与其他出生体重类别不同（P≤0.05）。总之，与未擦干的仔猪相比，出生时擦干仔猪可降低出生后早期仔猪直肠温度下降的程度和持续时间，尤其是对于低出生体重的仔猪。然而，擦干并将仔猪置于富氧环境中相比单独擦干并无额外益处。
