Ultraviolet radiation protection factors of livestock shade cloths for free-range pigs.

IF 1.9 3区 农林科学 Q3 DERMATOLOGY
Veterinary dermatology Pub Date : 2024-12-01 Epub Date: 2024-08-19 DOI:10.1111/vde.13290
A W Schmalwieser, L Bigelbach, S Helletzgruber, H Danhel, J Heydenreich
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Abstract

Background: Protection from solar ultraviolet radiation (UVR) is paramount in light-skinned pig breeds such as Yorkshire or Landrace to avoid sunburn.

Objectives: Determination of the UVR exposure of a pig and the sun protection abilities of shade cloths with different shade rates.

Animals: Life-sized plastic model of a Landrace pig.

Materials and methods: The model was equipped with 20 UVR meters at various anatomical positions that recorded the erythemal effective solar irradiance. A turntable enabled irradiation from different directions. Solar irradiance was measured in direct sunlight as well as under three shade cloths with different shade rates (50%, 75% and 90%) and a camouflage net. The sun protection factors (SPF) were determined as the ratio of unshaded-to-shaded measurements at the same solar elevation. The exposure ratio to ambient (ERTA) was calculated for each body site with respect to ambient irradiance. It allows determination of when pigs are at risk of sunburn and protection is needed.

Results: The calculated ERTA values show that some body parts may receive higher values than ambient UVR. Measurements showed that the SPF of shade cloths depends on textile denseness. Selected shade cloths reached values of 3.5 (shade rate 50%), 4.2 (75%) and 5.8 (90%). Protection by the camouflage net was poor. The highest SPF was gained on body sides where ERTA was highest.

Conclusions and clinical relevance: Shade cloths can protect all body sites effectively and vulnerable sites in particular. The results of our study enable an estimation of when pigs are at risk of sunburn and provide quantitative metrics for sun protection. This allows effective prevention of UVR-caused skin damage and secondary disorders.

土猪遮阳布的紫外线辐射防护系数
背景:对于约克夏或兰德瑞斯等浅色皮肤的猪种来说,防止太阳紫外线辐射(UVR)对避免晒伤至关重要:测定猪的紫外线辐射量以及不同遮光率遮阳布的防晒能力:材料和方法:该模型在不同的解剖位置配备了 20 个紫外线辐射计,用于记录红斑有效太阳辐照度。转盘可从不同方向进行照射。太阳辐照度是在阳光直射下以及在三种不同遮光率(50%、75% 和 90%)的遮光布和伪装网下测量的。防晒系数(SPF)是根据同一太阳高度下无遮阳测量值与遮阳测量值的比值确定的。计算每个身体部位相对于环境辐照度的暴露比率(ERTA)。这样就可以确定猪何时有晒伤风险,何时需要防护:结果:计算得出的 ERTA 值表明,某些身体部位的紫外线辐射值可能高于环境紫外线辐射值。测量结果表明,遮阳布的防晒系数取决于织物的密度。所选遮阳布的 SPF 值分别为 3.5(遮阳率 50%)、4.2(75%)和 5.8(90%)。伪装网的防护效果较差。体侧的 SPF 值最高,而 ERTA 值也最高:遮阳网可以有效保护身体的所有部位,尤其是易受伤害的部位。我们的研究结果可以估算出猪何时有被晒伤的风险,并为防晒提供量化指标。这样就能有效预防紫外线造成的皮肤损伤和继发性疾病。
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来源期刊
Veterinary dermatology
Veterinary dermatology 农林科学-兽医学
CiteScore
3.20
自引率
21.40%
发文量
92
审稿时长
12-24 weeks
期刊介绍: Veterinary Dermatology is a bi-monthly, peer-reviewed, international journal which publishes papers on all aspects of the skin of mammals, birds, reptiles, amphibians and fish. Scientific research papers, clinical case reports and reviews covering the following aspects of dermatology will be considered for publication: -Skin structure (anatomy, histology, ultrastructure) -Skin function (physiology, biochemistry, pharmacology, immunology, genetics) -Skin microbiology and parasitology -Dermatopathology -Pathogenesis, diagnosis and treatment of skin diseases -New disease entities
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