Minimal erythema dose determination in Holstein Friesian cattle

Hodnik, Jaka Jakob (avtor), Jankovec, Marko (avtor), Ježek, Jožica (avtor), Krušič, Žiga (avtor), Mitterhofer, Stefan (avtor), Starič, Jože (avtor)

Cattle on pasture are continuously exposed to solar UV radiation, which has been associated with biological effects such as sunburn, photosensitization, squamous cell carcinoma, and cutaneous vitamin D$_3$ production. The minimal erythema dose (MED) required to produce first-degree sunburn (erythema) is poorly researched in cattle. Since cattle are naturally covered with dense hair coats, the MED is influenced by the UV protection offered by the hair. The objective of this study was to determine the MED on intact-hair-covered (MED-H) and shaved white skin (MED-S) of Holstein Friesian cattle. Twenty-one Holstein Friesian cows and heifers were MED tested using a narrowband UV-B LED light (peak irradiance at 292 nm) on eight hair-covered and eight shaved areas over white skin previously unexposed to direct sunlight. Erythema was visually assessed after 24 h. The mean MED-H and MED-S were 5,595 and 329 J/m$^2$, respectively. Heifers had a higher MED-H compared to cows, 7,600 and 4,969 J/m$^2$, respectively. The mean UV transmittance of white cattle hair was 6.7%. MED-H was correlated with hair length (Spearman’s rho = 0.76). A linear regression model showed that each millimeter of hair coat length increased the MED-H by 316 J/m$^2$. In conclusion, this study provides a MED testing protocol for cattle and reports standardized values of MED for cattle on intact-hair-covered and shaved areas.

• Jezik: Angleški jezik
• Ključne besede: cow, ultraviolet rays, sunburn, phototesting, hair coat, cattle diseases, cattle
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: VF - Veterinarska fakulteta ; FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2021
• Št. strani: 7 str.
• Številčenje: Vol. 8, art. 757452
• PID: 20.500.12556/RUL-132782
• UDK: 636.2.09:616
• ISSN pri članku: 2297-1769
• DOI: 10.3389/fvets.2021.757452
• COBISS.SI-ID: 83093763
• Datum objave v RUL: 03.11.2021

Gradivo je del revije

• Naslov: Frontiers in veterinary science
• Skrajšan naslov: Front. vet. sci.
• Založnik: Frontiers Media
• ISSN: 2297-1769
• COBISS.SI-ID: 3969402

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Projekti

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Program financ.: Young researchers

• Financer: ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
• Številka projekta: P4-0092
• Naslov: Zdravje živali, okolje in varna hrana