Once regarded as a dependable shield against severe and life-threatening infections, third-generation cephalosporins – broad-spectrum antibiotics often reserved for serious, hard-to-treat infections – are now steadily losing their power. This troubling shift, according to Dr. Emelda Chukwu, a Senior Researcher at the Nigerian Institute of Medical Research (NIMR), marks a dangerous escalation in antimicrobial resistance and poses a serious threat to public health.
Addressing journalists at a media chat organised by NIMR on Monday, Chukwu warned that the growing resistance to these “reserve” antibiotics could erode decades of progress in infectious disease treatment, leaving clinicians with fewer effective options and patients increasingly vulnerable. The growing ineffectiveness of these powerful antibiotics represents a serious public health threat, with far-reaching implications for the treatment of infectious diseases in Nigeria and beyond.
Cephalosporins, she explained, are broad-spectrum beta-lactam antibiotics commonly used to treat serious bacterial infections that fail to respond to first- and second-generation antibiotics. Because of their potency and wide coverage, third-generation cephalosporins are often reserved for complicated or life-threatening infections. However, emerging evidence now suggests that even these “last-resort” options are steadily losing their effectiveness.
At the heart of the problem, Chukwu noted, is antimicrobial resistance (AMR)—a phenomenon in which microorganisms such as bacteria evolve or mutate in ways that render medicines designed to kill them ineffective. When this occurs, infections become harder to treat, hospital stays are prolonged, medical costs rise, and the risk of death increases. “AMR is one of the most pressing global health threats of our time,” she said. “It is threatening to reverse decades of progress made in the treatment of infectious diseases. We are now seeing high levels of resistance, where organisms no longer respond to medicines that were once effective.”
As part of efforts to better understand the scope of the challenge, Chukwu disclosed that her research team conducted a survey across four healthcare facilities selected as sentinel sites. The study focused on analysing clinical patterns of antimicrobial resistance, particularly among patients already battling various infections. The findings, she said, were troubling. “Our survey revealed a high level of resistance to third-generation cephalosporins,” she explained. “These are antibiotics that are meant to be reserved for serious cases. The fact that resistance is now developing at this level is alarming.”
According to Chukwu, the implications are profound. If resistance continues unchecked, routine infections and minor injuries could once again become deadly, while medical procedures that rely on effective antibiotics—such as surgeries, cancer chemotherapy and organ transplants—would become far riskier. She attributed the escalating resistance largely to human behaviour, especially the misuse and abuse of antibiotics. Practices such as self-medication, incomplete treatment courses, inappropriate prescription and the widespread availability of antibiotics without proper regulation were identified as major drivers of the problem.
Beyond human health, the researcher emphasised the importance of adopting a One Health approach—an integrated framework that recognises the interconnectedness of human health, animal health and the environment. Resistant organisms, she explained, do not respect boundaries; they circulate freely between people, animals and ecosystems. In this context, Chukwu highlighted the growing role of environmental and wastewater surveillance as a critical early-warning system for public health threats. She revealed that her team has established a structured wastewater surveillance system within the ecosystem to monitor the presence and spread of resistant pathogens.
“This system serves as an early warning tool,” she said.
“It can signal potential epidemic- or pandemic-prone pathogens before outbreaks escalate. By detecting these threats early, we have a better chance of responding swiftly and effectively.”
Chukwu called for stronger antibiotic stewardship, improved public awareness, and sustained investment in research and surveillance systems. Without decisive action, she warned, the world risks entering a post-antibiotic era—one in which common infections could once again claim countless lives.
