Asplenic Adults Research Articles

Prevention of infection in asplenic adult patients by general practitioners in France between 2013 and 2016

BackgroundGuidelines that detail preventive measures against Streptococcus pneumoniae, Neisseria meningitidis, Haemophilus influenzae type b, and influenza are published annually in France to decrease the risk of severe infections in immunocompromised patients. We aimed at describing adherence to these guidelines by GPs in the management of their asplenic patients in France between 2013 and 2016.MethodWe conducted a multicenter retrospective study between January 2013 and December 2016 in three French hospitals: asplenic adults were identified and their GPs were questioned. A descriptive analysis was performed to identify the immunization coverage, type and length of antibiotic prophylaxis, number of infectious episodes, and education of patients.Results103 patients were finally included in this study: only 57% were adequately vaccinated against Streptococcus pneumoniae or Neisseria meningitidis, 74% against Haemophilus influenzae type b, and 59% against influenza. Only 24% of patients received a combination of all four vaccinations. Two-thirds of patients received prophylactic antibiotics for at least 2 years. Overall, this study found that 50% of splenectomized patients experienced at least one pulmonary or otorhinolaryngological infection, or contracted influenza.ConclusionsThese data match those reported in other countries, including Australia and the United Kingdom, meaning a still insufficient coverage of preventive measures in asplenic patients. Improved medical data sharing strategies between healthcare professionals, along with educational measures to keep patients and physicians up to date in the prevention of infections after splenectomy would improve health outcomes of asplenic patients.

Vaccinations in asplenic adults.

The recommended immunizations for adult asplenic patients are reviewed. Patients without a spleen are at risk of developing overwhelming postsplenectomy infections due to encapsulated organisms, mainly pneumococcal, meningococcal, and Haemophilus influenzae type b (Hib). Due to the high mortality rates associated with these infections, vaccinations are recommended as a preventive measure. It is challenging to ensure optimal immunizations in these high-risk patients due to the number of recommended vaccines, the availability of multiple formulations, and the inability to administer specific formulations at the same time, as well as differences in subsequent vaccine administration schedules. Pharmacists play a key role in recommending specific vaccines and timing for these patients in order to achieve the most robust immune response. This article reviews the specific recommendations for pneumococcal, meningococcal, Hib, and influenza vaccinations in asplenic patients. In order to prevent potentially life-threatening infections, asplenic individuals should be vaccinated against S. pneumoniae, N. meningitidis, Hib, and influenza. The optimal timing of vaccination in relation to splenectomy depends on the nature of the splenectomy.

A Virtual Clinic Improves Pneumococcal Vaccination for Asplenic Veterans at High Risk for Pneumococcal Disease.

We developed a “virtual clinic” to improve pneumococcal vaccination among asplenic adults. Using an electronic medical record, we identified patients, assessed their vaccination status, entered orders, and notified patients and providers. Within 180 days, 38 of 76 patients (50%) received a pneumococcal vaccination. A virtual clinic may optimize vaccinations among high-risk patients.

Long-lasting hyporesponsivenss induced by the 23-valent pneumococcal polysaccharide vaccine (PPV23) in asplenic patients with β-thalassemia major

We have previously shown that multiple vaccinations with 23-valent pneumococcal polysaccharide vaccine (PPV23s) resulted in attenuated antibody responses to subsequent 7-valent conjugate vaccine (PCV7) in asplenic adults with β-thalassemia major (Orthopoulos et al. Vaccine 2009; 27:350). However, there is evidence that PPV23-induced immune hyporesponsiveness could be overcome with time (Papadatou et al. Clin Infect Dis 2014; 59:862).In the current study we investigate the duration of hyporesponsiveness in the same cohort seven years after the original study vaccinations. Patients received one dose of 13-valent conjugate vaccine (PCV13) and antibody levels were measured before and one month after vaccination.Antibodies increased significantly after vaccination with PCV13, but were lower than post-PCV7 seven years earlier. Lower pre-vaccination antibody levels were associated with more robust response to PCV13.Our findings suggest that PPV23 should be used cautiously in asplenic adults vaccinated with multiple PPV23s in the past. Measurement of anti-pneumococcal antibodies before and after vaccination could be used to optimise timing of vaccinations and certify vaccine immunogenicity in such individuals.

Fatal overwhelming postsplenectomy infection

Summary A total of 776 patients underwent splenectomy at the Massachusetts General Hospital between 1962 and 1972. Follow-up information was obtained on 637 patients (82 percent), including 584 adults and 53 children. There was a total of 4,837 person-years of follow-up with a mean observation interval of 8.4 years. Four cases of fatal overwhelming postsplenectomy infection were identified. In our pediatric population, the incidence of fatal overwhelming postsplenectomy infection was 3.77 percent, which was significantly higher than the incidence of 0.34 percent in our asplenic adults. Overwhelming postsplenectomy infection is a unique clinical entity distinguishable from other infections. It may occur during the lifetime of any asplenic patient and especially in those patients who have had a splenectomy in childhood. In asplenic adults, the incidence is low. The aggressive approach to splenic preservation in the adult should be tempered by these results.

Fatal overwhelming postsplenectomy infection

A total of 776 patients underwent splenectomy at the Massachusetts General Hospital between 1962 and 1972. Follow-up information was obtained on 637 patients (82 percent), including 584 adults and 53 children. There was a total of 4,837 person-years of follow-up with a mean observation interval of 8.4 years. Four cases of fatal overwhelming postsplenectomy infection were identified. In our pediatric population, the incidence of fatal overwhelming postsplenectomy infection was 3.77 percent, which was significantly higher than the incidence of 0.34 percent in our asplenic adults. Overwhelming postsplenectomy infection is a unique clinical entity distinguishable from other infections. It may occur during the lifetime of any asplenic patient and especially in those patients who have had a splenectomy in childhood. In asplenic adults, the incidence is low. The aggressive approach to splenic preservation in the adult should be tempered by these results.

Serious Infections in Adults Following Splenectomy for Trauma

Postsplenectomy sepsis in children is a well-recognized hazard. Few reports discuss the risk of sepsis in the asplenic adult. Case reports of 47 adults with serious infections following splenectomy for trauma were examined. We conclude that fulminant sepsis after splenectomy for trauma in adults is indeed a potential risk and that all such patients should receive penicillin prophylaxis and pneumococcal vaccine.

Pneumococcal Vaccine for High-Risk Patients

<h3>To the Editor.</h3> —In the OctoberArchives, Klein and Adachi¹recommended hospital-based programs to increase pneumococcal immunization rates for patients at risk for serious pneumococcal disease. Yet, their high-risk groups did not include surgically splenectomized patients, who are at substantial risk for pneumococcal pneumonia, meningitis, and sepsis. Although postsplenectomy sepsis is a well-recognized hazard in children, few reports discuss the risk of sepsis in the asplenic adult. We reviewed²the case reports of 47 adults (31 men and 16 women) with serious infections following splenectomy for trauma or incidental splenectomy during gastric or other surgery. Their ages ranged from 17 to 72 years, with a mean age of 36 years. The interval between the splenectomy and the infectious episode ranged from six months to 31 years, with a mean interval of 7.2 years. The most common organism involved was<i>Streptococcus pneumoniae</i>(29 cases). Diffuse intravascular coagulation was documented

The risk of sepsis in the asplenic adult

The risk of sepsis in the asplenic adult

The risk of sepsis in the asplenic adult.

The risk of postsplenectomy sepsis in children is well established. The risk of sepsis following splenectomy in the adult remains unknown. This study provides data on this important subject. All adults (ages 16--91) who underwent splenectomies in three hospitals of the Louisiana State University Medical Center between 1965 and 1975 were identified. There were 298 patients included in the study. Postsplenectomy information was collected on 256 patients. The mean period of observation was 45 months (960 patient years). There were seven deaths from fulminant sepsis (incidence rate: 2.7%). Data were collected on 250 patients who had either a gastrectomy or cholecystectomy without splenectomy. The mean period of observation was 61 months (1270 patient years). There were no deaths due to fulminant sepsis (p less than 0.05). When postsplenectomy sepsis was compared with the risk of sepsis in the population at large (0.001%), the difference is significant (p less than 0.001). In the subgroup of 69 patients with hematologic or malignant disease, there were three deaths from sepsis (4.3%). In 187 patients with no underlying diseases, four patients developed sepsis, which is an incidence of 2.2% (p less than 0.05 when compared with the population at large and control group). The risk of sepsis appears to be greater in patients with chronic disease, but has no relationship to age. These data speak for the conservation of splenic tissue when possible.

Letter: Infections in asplenic adults.

Letter: Infections in asplenic adults.

Letter: Infections in asplenic adults.

Letter: Infections in asplenic adults.