1.0West Texas Rangelandshttps://agrilife.org/westtexasrangelandsmorgan.treadwellrich600338<blockquote class="wp-embedded-content" data-secret="gLznhaPgH7"><a href="https://agrilife.org/westtexasrangelands/new-publication-photosensitization/">New Publication! Photosensitization</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://agrilife.org/westtexasrangelands/new-publication-photosensitization/embed/#?secret=gLznhaPgH7" width="600" height="338" title="“New Publication! Photosensitization” — West Texas Rangelands" data-secret="gLznhaPgH7" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://agrilife.org/westtexasrangelands/wp-includes/js/wp-embed.min.js </script> https://agrilife.org/westtexasrangelands/files/2025/11/photosensitization_Page_1.jpg17002200Photosensitization requires a phototoxic agent, producing a rapid reaction with light wavelengths above 320 nanometers (nm). Damage can range from mild redness and swelling to severe cell death and skin loss. Ruminants are most frequently affected by this condition, but horses, swine, and poultry can also be affected.