They also share with MIS-C and severe cases of COVID-19 high levels both of ferritin (released by neutrophils) and of haemophagocytosis.The frequent gastrointestinal presentation and mesenteric lymph node inflammation are in keeping with the known liking of SARS-CoV-2 to replicate in enterocytes. Association of Kawasaki-like disease with COVID-19 could support the view that SARS-CoV-2 can cause systemic vasculitis by targeting endothelial tissue via angiotensin-converting enzyme 2 (ACE2), the protein which the virus uses to gain access to cells. While the initial infection is known to be capable of causing acute myocardial damage, occurrence of myocarditis could also plausibly be linked to systemic hyperinflammation triggered by a disorderly post-infectious immune response. It has been suggested that SARS-CoV-2 might lead to immune-mediated damage to the heart and coronary arteries via immune complexes or increased T-cell responses.Understanding the pathophysiology is a key research priority. Questions regarding the underlying molecular mechanisms that lead to the disorder following exposure to SARS-CoV-2 include identification of: any genetic predisposition factors; any associations with particular viral variant/s; any molecular patterns capable of triggering the autoimmune/autoinflammatory responses. Another key question is whether the molecular mechanisms that trigger autoimmune/autoinflammatory responses in children with PMIS and adults with severe COVID-19 (including the induction of high concentrations of IL-6) are similar or distinct.A potential link with Kawasaki disease is under discussion.
It was originally thought that because the mite is a normal inhabitant of the dogs skin, the presence of the mites does not conclusively mean the dog has demodicosis. Recent research, however, found that the demodex mite is rarely found on clinically normal dogs, meaning that the presence of any number of mites in a sample is very likely to be significant. In breeds such as the West Highland White Terrier, relatively minor skin irritation which would otherwise be considered allergy should be carefully scraped because of the predilection of these dogs to demodectic mange. Skin scrapings may be used to follow the progress of treatment in demodectic mange. Alternatively, plasma levels of zinc and copper have been seen to be decreased in dogs with demodicosis. This may be due to inflammation involved in the immune response of demodicosis which can lead to oxidative stress, resulting in dogs with demodicosis to exhibit higher levels of antioxidant productivity. The catalases involved in the antioxidant pathway require the trace minerals zinc and copper. Dogs with demodicosis show a decrease in plasma copper and zinc levels due to the increased demand for antioxidant activity. Therefore, this may be considered as a potential marker for demodicosis. Treatment
Dogs
Localized demodectic mange is considered a common puppyhood ailment, with roughly 90% of cases resolving on their own with no treatment. Minor, localized cases should be left to resolve on their own to prevent masking of the more severe generalized form.