DISCUSSION
Fortunately, the PCP and the ED provider identified risk factors that contributed to the patient’s pneumonia and its subsequent worsening to sepsis and acute hypoxemic respiratory failure. The immunosuppressive/immunomodulatory effect of mAb therapy increased the patient’s risk for infection and the severity of infection, which is why vigilant safety monitoring and surveillance is essential with mAb treatment.1 Bloodwork should be performed at least every 6 months and include a complete blood count, complete metabolic panel with differential, and JC virus antibody test. Additionally, urinalysis should be performed prior to every mAb infusion. All testing recommended in the package insert for the patient’s prescribed therapy should be performed.
The patient’s history of asthma and his chronic vaping predisposed him to respiratory infections. In mice studies, exposure to e-cigarette vapor has been shown to be cytotoxic to airway cells and to decrease macrophage and neutrophil antimicrobial function.2 Exposure also alters immunomodulating cytokines in the airway, increases inflammatory markers seen in BAL and serum samples, and increases the virulence of Staphylococcus aureus.2
TREATMENT AND PATIENT EDUCATION
The PCP’s treatment plan included patient education about the importance of infection control measures when receiving a mAb; this includes practicing good hand and environmental hygiene, maintaining vaccinations, avoiding or reducing exposure to individuals who have infections or colds, avoiding large crowds (especially during flu season), and following recommendations for nutrition and hydration. The PCP also discussed how to recognize the early signs and symptoms of an infection—and the need for vigilant safety monitoring. The PCP described available options for smoking cessation, including nicotine replacement products, prescription non-nicotine medications, behavioral therapy, and/or counseling (individual, group or telephone) and discussed the risks associated with consuming nicotine and/or marijuana/THC and using electronic vaporizing devices.
The PCP emphasized the importance of completing the entire course of the oral antibiotics prescribed at discharge. The patient and the PCP agreed to the following plan of care: appointments with a pulmonologist and a neurologist within the next 2 weeks, and follow-up visits with the PCP every 6 months (or more frequently, as needed) and with a neurologist at least every 6 months (or as indicated by his medication’s prescribing recommendations).