{"id":664,"date":"2025-09-27T13:45:23","date_gmt":"2025-09-27T13:45:23","guid":{"rendered":"https:\/\/boudivet.com\/?p=664"},"modified":"2025-09-27T13:46:48","modified_gmt":"2025-09-27T13:46:48","slug":"ringworm-dermatophytosis-a-common-but-contagious-fungal-infection","status":"publish","type":"post","link":"https:\/\/boudivet.com\/?p=664","title":{"rendered":"Ringworm (Dermatophytosis): A Common but Contagious Fungal Infection"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Introduction<\/h3>\n\n\n\n<p data-block-type=\"core\">Ringworm, also known as <strong>dermatophytosis<\/strong>, is a superficial fungal infection of the skin, hair, and nails caused by <strong>dermatophytes<\/strong> \u2014 fungi that feed on keratin. Despite its name, ringworm is <strong>not caused by a worm<\/strong>, but by fungi belonging mainly to the genera <strong>Microsporum, Trichophyton,<\/strong> and <strong>Epidermophyton<\/strong>. It affects a wide range of domestic animals, especially cats, dogs, cattle, and horses, and is <strong>highly zoonotic<\/strong>, meaning it can be transmitted to humans.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\" data-block-type=\"core\"><img loading=\"lazy\" decoding=\"async\" width=\"962\" height=\"652\" src=\"https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_144452_www.bing_.com_.jpeg\" alt=\"\" class=\"wp-image-639\" style=\"width:611px;height:auto\" srcset=\"https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_144452_www.bing_.com_.jpeg 962w, https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_144452_www.bing_.com_-300x203.jpeg 300w, https:\/\/boudivet.com\/wp-content\/uploads\/2021\/12\/Captura-de-pantalla_27-9-2025_144452_www.bing_.com_-768x521.jpeg 768w\" sizes=\"auto, (max-width: 962px) 100vw, 962px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Etiology and Causative Agents<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Genus<\/strong>: <em>Microsporum<\/em>, <em>Trichophyton<\/em>, <em>Epidermophyton<\/em>.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Most common veterinary species<\/strong>:\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><em>Microsporum canis<\/em> (cats, dogs, zoonotic).<\/li>\n\n\n\n<li data-block-type=\"core\"><em>Microsporum gypseum<\/em> (soil-associated).<\/li>\n\n\n\n<li data-block-type=\"core\"><em>Trichophyton mentagrophytes<\/em> (dogs, rodents, humans).<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Reservoirs<\/strong>: Infected animals, contaminated environment (spores on bedding, grooming tools, soil).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Morphology and Resistance<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Fungi are filamentous<\/strong>, producing septate hyphae and asexual spores (arthroconidia).<\/li>\n\n\n\n<li data-block-type=\"core\">Spores can survive for <strong>months to years<\/strong> in the environment, making eradication difficult.<\/li>\n\n\n\n<li data-block-type=\"core\">Resistant to desiccation but sensitive to disinfectants such as bleach, iodine compounds, and enilconazole.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Transmission and Epidemiology<\/h3>\n\n\n\n<p data-block-type=\"core\">Ringworm spreads by:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Direct contact<\/strong> with infected animals or humans.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Indirect contact<\/strong> with contaminated objects (brushes, collars, bedding).<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Environmental exposure<\/strong> to fungal spores in soil or surfaces.<\/li>\n<\/ul>\n\n\n\n<p data-block-type=\"core\"><strong>Risk groups<\/strong>: Young animals, immunosuppressed individuals, overcrowded shelters, and farms.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Pathogenesis and Clinical Signs<\/h3>\n\n\n\n<p data-block-type=\"core\">Dermatophytes invade keratinized tissues (stratum corneum, hair, nails) but do not penetrate deeper tissues.<br>The infection causes an inflammatory reaction in the skin, leading to:<\/p>\n\n\n\n<p data-block-type=\"core\"><strong>In animals<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Circular areas of alopecia (hair loss).<\/li>\n\n\n\n<li data-block-type=\"core\">Scaly, crusty, or inflamed lesions with a characteristic <strong>ring-like appearance<\/strong>.<\/li>\n\n\n\n<li data-block-type=\"core\">Broken hairs and brittle coat.<\/li>\n\n\n\n<li data-block-type=\"core\">Itching may or may not be present.<\/li>\n\n\n\n<li data-block-type=\"core\">In cattle: &#8220;Trichophytosis&#8221; with grayish-white plaques on the head and neck.<\/li>\n<\/ul>\n\n\n\n<p data-block-type=\"core\"><strong>In humans<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Itchy, ring-shaped red lesions on skin (classic \u201cringworm\u201d appearance).<\/li>\n\n\n\n<li data-block-type=\"core\">On scalp: patchy hair loss (tinea capitis).<\/li>\n\n\n\n<li data-block-type=\"core\">On body: red, scaly rings (tinea corporis).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Incubation Period<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\">Typically <strong>1\u20133 weeks<\/strong> after exposure, depending on fungal load and host immunity.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Laboratory Diagnosis<\/h3>\n\n\n\n<p data-block-type=\"core\">Accurate diagnosis is essential since ringworm resembles other skin diseases. Methods include:<\/p>\n\n\n\n<ol class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Wood\u2019s lamp examination<\/strong>: Some <em>Microsporum<\/em> species fluoresce apple-green.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Microscopy<\/strong>: KOH mount of hair\/skin scrapings showing hyphae and arthroconidia.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Culture<\/strong>: On Sabouraud\u2019s dextrose agar with antibiotics, colonies of dermatophytes appear within 1\u20133 weeks.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>PCR<\/strong>: Molecular confirmation in reference laboratories.<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Prevention and Control<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Environmental decontamination<\/strong>: Regular disinfection with bleach, enilconazole, or other antifungal agents.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Isolation of infected animals<\/strong> to prevent spread in households or shelters.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Hygiene<\/strong>: Hand washing, wearing gloves when handling infected pets.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Regular grooming and inspection<\/strong> of pets and livestock.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Vaccination<\/strong>: In some countries, vaccines against <em>Trichophyton verrucosum<\/em> (cattle) and <em>Microsporum canis<\/em> (cats\/dogs) are available to aid prevention.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Treatment<\/h3>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Topical antifungals<\/strong>: Miconazole, enilconazole, clotrimazole creams or sprays.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Systemic antifungals<\/strong> (for severe or generalized cases): Itraconazole, terbinafine, griseofulvin (in animals, under veterinary supervision).<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Shampoos and dips<\/strong> (lime sulfur, miconazole-chlorhexidine).<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Environmental cleaning<\/strong>: Repeated disinfection to eliminate spores.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/ data-block-type=\"core\">\n\n\n\n<h3 class=\"wp-block-heading\" data-block-type=\"core\">Importance for Veterinary and Public Health<\/h3>\n\n\n\n<p data-block-type=\"core\">Ringworm is a <strong>highly contagious zoonotic disease<\/strong>, especially important in households with children, the elderly, or immunocompromised people. In farm animals, it also causes economic losses due to reduced leather quality and market restrictions.<\/p>\n\n\n\n<p data-block-type=\"core\">At <strong>Dr. Boudi Widad Veterinary Clinic<\/strong>, we provide:<\/p>\n\n\n\n<ul class=\"wp-block-list\" data-block-type=\"core\">\n<li data-block-type=\"core\"><strong>Accurate diagnostic testing<\/strong> for rapid identification of dermatophytes.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Comprehensive treatment plans<\/strong> combining topical and systemic therapy.<\/li>\n\n\n\n<li data-block-type=\"core\"><strong>Preventive guidance<\/strong> for pet owners, shelters, and farmers to minimize reinfection.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Introduction Ringworm, also known as dermatophytosis, is a superficial fungal infection of the skin, hair, and nails caused by dermatophytes \u2014 fungi that feed on keratin. Despite its name, ringworm is not caused by a worm, but by fungi belonging mainly to the genera Microsporum, Trichophyton, and Epidermophyton. It affects a wide range of domestic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":639,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-664","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-animal-disease"],"blocksy_meta":[],"_links":{"self":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts\/664","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=664"}],"version-history":[{"count":1,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts\/664\/revisions"}],"predecessor-version":[{"id":665,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/posts\/664\/revisions\/665"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=\/wp\/v2\/media\/639"}],"wp:attachment":[{"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=664"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=664"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/boudivet.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=664"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}