What is the most likely diagnosis for a patient presenting with recent abrasion, erythematous streaks proximal to the wound, regional tender lymphadenopathy, tachycardia, and fever?

The clinical presentation described strongly aligns with acute infectious lymphangitis. This condition typically arises following a breach in the skin, such as an abrasion, which allows pathogens to enter the lymphatic system. The presence of erythematous streaks extending from the site of injury is a hallmark sign of lymphangitis, indicating inflammation of the lymphatic vessels that is often due to bacterial infection.

In addition to the erythematous streaks, the patient shows regional tender lymphadenopathy. This is consistent with lymphangitis as the lymph nodes that drain the affected area often become reactive and swollen due to the infection, causing tenderness. The systemic symptoms such as tachycardia and fever suggest that the body is mounting a response to an infection, which is a common finding in cases of acute infectious lymphangitis.

While cellulitis involves similar signs, it typically presents as a diffuse skin infection without the characteristic streaking associated with lymphatic involvement. Deep vein thrombosis would predominantly present with swelling and pain in a limb and would not typically cause the erythematous streaking or the systemic signs of infection such as fever. Septic shock is a more severe systemic response and would be accompanied by hypotension and severe multisystem involvement beyond local