https://www.selleckchem.com/ Necrotizing soft tissue infections (NSTI) are rapidly spreading and life-threatening infections of skin and soft tissue. Essentially there are two types of NSTI, based on the invasive microorganisms. The speed of development and associated clinical features differ markedly depending on the bacterial etiology. Early recognition, extensive surgical debridement, and appropriate antimicrobials are pivotal for successful management. In this chapter, we present three cases from the INFECT-study population. This study was an international, multicenter, prospective cohort study of adult patients with NSTI. We describe the clinical presentations, pre-, peri-, and postoperative clinical findings, microbiology, and treatment in cases of monobacillary Streptococcus pyogenes necrotizing soft tissue infections NSTI, polymicrobial infection, and an unusual presentation of pelvic monobacillary S. pyogenes infection in an immunocompromised patient.All who have contributed in writing this chapter have been patients and parents that have experienced an horrific life event. The horrific disease named necrotising fasciitis has affected our lives for ever. All four stories have explained how easily an everyday infection can develop incredibly quickly into a life-threatening experience. Three stories are expressed from the worn hearts of being a mother, fighting for their child every step of the way. Knowing our children and how they react through pain and illness is felt in each word, sentence, paragraph and even between the lines. Dedicating our unmarkable love and devotion for the child we carried for 9 months. To see them suffer in illness is heart wrenching, but to experience this disease necrotising fasciitis is something else. We must live through every day watching them grow with their scars of debridement, and to support them through further operations, let alone mental scars. Parents show a strength of support like no other and we hope that their liv