In this work, we wanted to assess whether during acute infection the production of leptin was also affected, as well as the levels of leptin receptor mRNA of two major transcript variants, the leptin receptor (Lepr) transcript variant 1 mRNA (also known as leptin receptor variant b) and leptin receptor (Lepr) transcript variant 3, mRNA (also known as leptin receptor variant a). The gene discussed is LEPR; the disease is infection.