Intravenous Antibiotic Therapy Research Articles

Early Exacerbation Relapse is Increased in Patients with Asthma and Bronchiectasis (a Post hoc Analysis)

PurposeAsthma is a common comorbidity in patients with bronchiectasis and has been shown to increase the risk of bronchiectasis exacerbations. This paper explores the impact of comorbid asthma on patients receiving intravenous antibiotic treatment for bronchiectasis exacerbations.MethodsThis was a post hoc analysis of the Meropenem randomised controlled trial of 90 patients that had intravenous antibiotic treatment for bronchiectasis exacerbations. The participants were split into two groups: group 1 (asthma and bronchiectasis) and group 2 (bronchiectasis). The authors assessed response to treatment and time to next exacerbation.ResultsThere were 38 participants in group 1 and 34 participants in group 2. The groups were found to be comparable in terms of age, sex, and bronchiectasis severity (median (95% CI) group 1 and then group 2 data): age 64.0(59.3, 68.6) and 63.6(57.9, 69.4) years old, p = 0.8; 57.9% and 64.7% female, p = 0.6; Bronchiectasis Severity Index 11.1(9.8, 12.4) and 10.1(8.2, 12.0), p = 0.3. There was a similar response to treatment between the groups, but group 1 were found to relapse early by day 14, 31.6% in group 1 and 11.8% in group 2, p = 0.03. In the Cox proportional hazards model, asthma was the only independent risk factor for early relapse by day 14 (odds ratio (95% CI) 3.16 (1.02–9.79), p = 0.047).ConclusionThe clinical response to treatment was similar but patients with coexisting asthma were at increased risk of early relapse within 14 days of stopping intravenous antibiotic therapy. Clinical Trial Registration: NCT02047773.

Pulmonary parenchymal involvement secondary to subcutaneous injection of silicone gels: a case report

Pulmonary parenchymal involvement secondary to the subcutaneous injection of silicone gels is an unusual condition which occurs more frequently in women aged between 22 and 55 years. Although different theories have been put forward about its etiology, it is unknown and the condition may cause local and systemic complications and even have a fatal outcome. Few cases have been reported in South America and there is no report of this unique entity in Peru. We present the case of a previously healthy 28-year-old male transgender patient who, after an illegal subcutaneous injection of silicone gels in the gluteal region given by a non-healthcare professional, showed progressive respiratory distress and stabbing chest pain of approximately 7 out of 10 on the pain scale within the first 24 hours. Upon admission to the emergency room,respiratory failure was objectively evidenced since the patient had an oxygen saturation of 72 % at a FiO₂ of 21 %, as well as pulmonary parenchymal involvement both in the CT scan and chest X-ray with signs highly suggestive of this pathology. Using a SARS-CoV-2 RNA real-time RT-PCR test performed on a respiratory specimen, COVID pneumonia, immunodeficiency disorders and pulmonary embolism were ruled out. Since there is no standard treatment, the patientwas given relevant support measures such as the administration of supplemental oxygen at a low flow rate by binasal cannula, intravenous systemic corticosteroids and antibiotic therapy, thus achieving good progress with resolution of the initial clinical presentation. Then, after 10 days of intrahospital treatment, the patient was discharged.

Complications and Outcomes Associated with Two-Stage Treatment of Periprosthetic Total Knee Infection

Background and Hypothesis: Periprosthetic joint infection (PJI) is treated with implant resection, debridement, and component reimplantation after infection eradication. Treatment consists of either a single surgery or two-stage surgery with intravenous antibiotic therapy between stages. We replicated a recent study which concluded two-stage treatment is associated with high morbidity, hypothesizing that complication rates would be similar, but that morbidity is not always conclusively a consequence of two-stage treatment for PJI
 Project Methods: Prospectively documented data on all primary and revision knees undergoing two-stage treatment for PJI by a single surgeon were retrospectively reviewed. Surgical complications were quantified for the interstage and post-reimplantation periods. Chi-squared tests were used to compare current findings to published findings.
 Results: Patient demographics and comorbidities were equivalent in the two studies (p ≥ .137). More complex infections characterized the current study as evidenced by significantly more polymicrobial infections (p < .001) and greater use of static spacers due to bone loss (p = .002). Nonetheless, only 1.5% of cases in the current study did not undergo component reimplantation compared to 7.8% in the comparison study (p = .129). There were no differences in the number of additional interstage and post-reimplantation septic surgeries (p ≥ .492). Using a proposed system which penalizes additional operations required to eradicate infection, treatment success rates at minimum one year follow-up were 64% and 71%, respectively (p = .473). Without these penalties, treatment success in the current study was 95.6% (equivalent proportion not available for comparison study). All-cause mortality was statistically equivalent in the two studies (15.6 versus 7.6%, p = .144) but no deaths from PJI were observed in the current study (unknown for comparison study).
 Potential Impact: Study findings suggest that morbidity attributed to two-stage treatment reflect the inherent complexity of this patient group, and not the two-stage treatment itself.

Complications and Outcomes Associated with Two-Stage Treatment of Periprosthetic Total Hip Infection

Background and Hypothesis: Periprosthetic joint infection (PJI) is treated with implant resection, debridement, and component reimplantation after infection eradication. Treatment consists of either a single surgery or two-stage surgery with intravenous antibiotic therapy between stages. We replicated a recent study which concluded two-stage treatment is associated with high morbidity, hypothesizing that complication rates would be similar, but that morbidity is not always conclusively a consequence of two-stage treatment for PJI
 Project Methods: Prospectively documented data on all primary and revision hips undergoing two-stage treatment for PJI by a single surgeon were retrospectively reviewed. Surgical complications were quantified for the interstage and post-reimplantation periods. Chi-squared tests were used to compare current findings to published findings.
 Results: Six of seven patient demographics and comorbidities were equivalent in the two studies (p ≥ .278). More complex infections characterized the current study as evidenced by significantly more polymicrobial infections (p < .001). Spacer retention rather than component reimplantation did not occur in the current study but characterized 32 patients (16%) in the comparison study (p = .002). There were no differences in the number of additional interstage septic procedures (p = .402) and fewer post-reimplantation septic surgeries in the current study (p = .018). Using a proposed system which penalizes additional operations required to eradicate infection, treatment success rates at minimum one year follow-up were 73% and 71%, respectively (p = .856). Without these penalties, treatment success in the current study was 93% (equivalent proportion not available for comparison study). All-cause mortality was higher in the current study (18.2% versus 7.6%, p = .044) but only two deaths were related to PJI (unknown for comparison study).
 Potential Impact: Study findings suggest that morbidity attributed to two-stage treatment reflect the inherent complexity of this patient group, and not the two-stage treatment itself.

Clinical characteristics of Campylobacter bacteremia: a multicenter retrospective study

Campylobacter species are the pathogens of the intestinal tract, which infrequently cause bacteremia. To reveal the clinical characteristics of Campylobacter bacteremia, we performed a retrospective, multicenter study. Patients diagnosed with Campylobacter bacteremia in three general hospitals in western Japan between 2011 and 2021 were included in the study. Clinical, microbiological, and prognostic data of the patients were obtained from medical records. We stratified the cases into the gastroenteritis (GE) and fever predominant (FP) types by focusing on the presence of gastrointestinal symptoms. Thirty-nine patients (24 men and 15 women) were included, with a median age of 57 years and bimodal distribution between those in their 20 s and the elderly. The proportion of GE and FP types were 21 (53.8%) and 18 (46.2%), respectively. Comparing these two groups, there was no significant difference in patient backgrounds in terms of sex, age, and underlying diseases. Campylobacter jejuni was exclusively identified in the GE type (19 cases, 90.5%), although other species such as Campylobacter fetus and Campylobacter coli were isolated in the FP type as well. Patients with the FP type underwent intravenous antibiotic therapy more frequently (47.6% vs. 88.9%), and their treatment (median: 5 days vs. 13 days) and hospitalization (median: 7 days vs. 21 days) periods were significantly longer. None of the patients died during the hospitalization. In summary, we found that nearly half of the patients with Campylobacter bacteremia presented with fever as a predominant manifestation without gastroenteritis symptoms.

Cryptogenic subdural empyema mimicking subacute-subdural hematoma on CT imaging in the pediatric group: a clinical case series

Introduction: Subdural empyema (SDE) is a rare but potentially life-threatening intracranial infection that is invariably fatal if left untreated. As clinical and radiologic features may be subtle or uncertain, early diagnosis may be a challenge but is crucial in reducing morbidity and mortality. SDE should always be suspected especially in a paediatric group with a history of fever, focal seizures, meningism and neurological deficit. The management of SDE has been debated in the literature for decades. Being one of the most serious neurosurgical emergencies, goals include surgical evacuation where both burr-hole drainage and craniotomy are primary surgical options, treatment of pus, and establishing the etiologic agent which subsequently guides antibiotic therapy for a favourable outcome.
 Case presentation: We present three cases of immunocompetent patients, 4 and 6-month-old infants with a 14-year-old adolescent presenting with SDE without underlying risk factors. Non-contrast computed tomography imaging was equivocal for SDE. All of them required surgery. The two infants underwent burr holes and subsequently a wide craniotomy with intravenous antibiotics therapy while the adolescent required craniectomy because of swollen brain. They all had a favourable outcome on long term follow up.
 
 Conclusion: Paediatric supratentorial SDE, although rapidly fatal if not identified promptly, can be effectively managed with early surgical drainage preferably craniotomy, eradication of the source, and sensitive IV broad-spectrum antibiotics. In this article, we discuss the clinical presentation, diagnostic tools, treatment options and outcomes for SDE with an emphasis on the challenges.

長期間の抗菌薬経静脈投与を要した頭蓋底骨髄炎例

Skull-base osteomyelitis occurs as a result of spread of inflammatory disease around the temporal bone into the adjacent skull base, and carries a poor prognosis. Occasionally, patients present with paralysis of the lower cranial nerves, which further worsens the survival. Prolonged intravenous antibiotic therapy for six to eight weeks is needed for treatment. Herein, we present a case of skull-base osteomyelitis caused by Pseudomonas aeruginosa that developed in a 78-year-old male patient with diabetic nephropathy who was under maintenance hemodialysis. He presented to our hospital with the complaints of earache and otorrhea on the left side. Exploratory tympanotomy revealed pus and granulation tissue filling the tympanic cavity and mastoid, and destruction of the tympanic portion of the temporal bone; based on the findings and results of pus culture, we made the diagnosis of skull-base osteomyelitis caused by Pseudomonas aeruginosa. While the osteomyelitis was gradually improving with intravenous meropenem, the patient desired early discharge from the hospital. Therefore, the intravenous antibiotic therapy was switched earlier than intended to oral antimicrobial therapy, which led to progression of the disease, and the patient presented with lower cranial nerve palsies three months after his discharge. He was initiated again on intravenous meropenem. While the osteomyelitis improved gradually with the intravenous antimicrobial therapy for two months, the levels of inflammatory markers, such as the serum c-reactive protein, increased again soon after discontinuation of the intravenous antibiotic therapy. Therefore, we decided to continue the patient on intravenous meropenem every other day administered at the outpatient clinic after dialysis. The treatment was continued for four months after discharge, and the improvement was maintained. We reaffirmed the importance of long-term intravenous antibiotic therapy to treat skull-base osteomyelitis. Intravenous antibiotic administration every other day at the outpatient clinic after dialysis could be a useful treatment strategy to treat skull-base osteomyelitis in patients under maintenance hemodialysis.

Uma causa rara e fatal de doença bolhosa num recém-nascido

Newborns may develop blisters and erosions due to multiple entities, including infections, congenital or hereditary diseases. In this report we describe a male newborn who presented with pustular lesions on the first day of life and progressively developed blisters and erosions. Due to disease progression even with intravenous antibiotic therapy after suspicion of bullous impetigo, other diagnoses had to be considered and a multidisciplinary approach with the support of dermatology was necessary. A skin biopsy and genetic study were performed, which allowed the definitive diagnosis of Epidermolysis Bullosa, a group of rare hereditary bullous diseases. Because of the absence of curative therapy, supportive treatment was performed, which did not prevent the patients death at 2 months of life. It is therefore essential for pediatricians to identify this entity as early as possible in order to improve the prognosis.

Uma causa rara e fatal de doença bolhosa num recém-nascido

Newborns may develop blisters and erosions due to multiple entities, including infections, congenital or hereditary diseases. In this report we describe a male newborn who presented with pustular lesions on the first day of life and progressively developed blisters and erosions. Due to disease progression even with intravenous antibiotic therapy after suspicion of bullous impetigo, other diagnoses had to be considered and a multidisciplinary approach with the support of dermatology was necessary. A skin biopsy and genetic study were performed, which allowed the definitive diagnosis of Epidermolysis Bullosa, a group of rare hereditary bullous diseases. Because of the absence of curative therapy, supportive treatment was performed, which did not prevent the patients death at 2 months of life. It is therefore essential for pediatricians to identify this entity as early as possible in order to improve the prognosis

Characteristics of pediatric recurrent acute mastoiditis: A case-control study.

Data on pediatric recurrent acute mastoiditis are lacking, despite its morbidity and clinical significance. Our aim was to describe the incidence, characteristics, and associated factors of recurrent mastoiditis in hospitalized children. Using a case-control design, analyzing electronic data of hospitalized children with acute mastoiditis between June 2011 and December 2018, children with recurrent mastoiditis were compared to children with a single episode at the time of hospitalization. Recurrent episodes of mastoiditis were compared to the first episodes. Recurrent acute mastoiditis was defined as recurring mastoiditis ≥4-weeks after a completely resolved event. Of 347 children hospitalized with acute mastoiditis, 22 (6.3%) had recurrent mastoiditis; the median interval between episodes was 3 months (range: 1-36). The mean ± SD age was 2.3 ± 2.25 years. A comparison of first episodes in recurring cases to single episodes by univariate and multivariate analysis, showed no differences in the pre-admission management or in the isolated pathogens; however, a history of atopic dermatitis and percutaneous abscess drainage were more frequent in first episodes of recurring cases (27.3% vs. 1.2%, p < 0.001, and 27.3% vs. 10.0%, p = 0.026, respectively). The second episode of acute mastoiditis was characterized by a milder clinical course and shorter durations from symptoms to hospitalization, intravenous antibiotic therapy, and length of hospital stay. Linear regression showed that an increased interval from symptoms to hospitalization significantly increased length of hospital stay (regression coefficient of 0.215 [95% CI: 0.114-0.317], p < 0.001). Recurrent episodes of mastoiditis were clinically milder, with shorter length of hospital stay compared to first episodes, possibly because of early admission.

ACUTE UNCOMPLICATED DIVERTICULITIS: Guidelines on Diagnosis and Management: is everything fine?

The transition from intravenous (IV) antibiotic therapy to oral therapy and the observation that in patients with acute uncomplicated diverticulitis (AUD), treatment with or without antibiotics gave similar results in both hospitalized and outpatients, opened the way for out-of-hospital treatment in selected patients with CT-confirmed diagnosis. Due to economic constraints and a growing demand for hospitalization, home hospital care (HAH) and other community-based services was supported to alleviate the burden on emergency departments (EDs). This resulted in significant cost savings for the National Health Service (NHS) but, in many countries, community services are not uniformly present, leading to health care inequality. Relationships between hospital and community doctors indicate poor professional communication. Shared guidelines could lead to increased adherence. Some conditional recommendations based on low-certainty evidence related to the diagnosis and management of AUD remain controversial. Even after recovery from an episode, the question of whether to pursue conservative management or elective surgery is still open for debate. The outpatient treatment is understood as referring to both patients managed by hospital doctors and those treated by general physicians in their office. On management and outcomes of patients with AUD diagnosis in primary care there is little data. AUD treatment without antibiotics encounters resistance in many countries for multiple reasons, including low implementation and uncertain dissemination of guidelines recommendations. This would require greater control and commitment on the part of Institutional bodies and scientific societies.

Role of topical antibiotic ointment in the lateral graft following underlay myringoplasty: a prospective randomised study

ObjectiveThe objective of this study was to compare the graft outcome and postoperative infection of with and without the use of antibiotic ointment following myringoplasty for the treatment of chronic perforations.Study DesignRandomized controlled trial.Material and Methods135 chronic perforations were prospectively randomized to use of antibiotic ointment group (UAO, n = 68) or no use of antibiotic ointment group (NAO, n = 67) following myringoplasty. The graft outcomes and postoperative infection were compared among two groups at 6 months.ResultsAt postoperative 6 months, the graft infection rate was 4.4% in the UAO group and 10.4% in the NAO group, the difference was not significant (P = 0.312).The graft success rates were 92.6% in the UAO group and 91.0% in the NAO group, the difference was not significant (P = 0.979). In the UAO group, 3 patients with purulence ear discharge resulted in a residual perforation although they received ofloxacin ear drops and intravenous antibiotic therapy treatment. In the NAO group, 6 patients with purulence ear discharge resulted in a residual perforation, only one, with mild purulence discharge was successfully treated and closed. In addition, no significant between-group differences were observed pre- (P = 0.746) or post- (P = 0.521) operative air bone gap (ABG) values or mean ABG gain (P = 0.745). However, granular myringitis with minimal moistness but without infection has been noted in 3 (4.4%) patients in the UAO group and in 5 (7.5%) in the NAO group, the difference was not significant (P = 0.699).ConclusionsUse and non-use of antibiotic ointments for lateral packing of graft are both comparable methods following myringoplasty for postoperative infection and graft outcomes.

Decreased hospital readmissions after programmatic strengthening of an outpatient parenteral antimicrobial therapy (OPAT) program.

To determine whether a structured OPAT program supervised by an infectious disease physician and led by an OPAT nurse decreased hospital readmission rates and OPAT-related complications and whether it affected clinical cure. We also evaluated predictors of readmission while receiving OPAT. A convenience sample of 428 patients admitted to a tertiary-care hospital in Chicago, Illinois, with infections requiring intravenous antibiotic therapy after hospital discharge. In this retrospective, quasi-experimental study, we compared patients discharged on intravenous antimicrobials from an OPAT program before and after implementation of a structured ID physician and nurse-led OPAT program. The preintervention group consisted of patients discharged on OPAT managed by individual physicians without central program oversight or nurse care coordination. All-cause and OPAT-related readmissions were compared using the χ2 test. Factors associated with readmission for OPAT-related problems at a significance level of P < .10 in univariate analysis were eligible for testing in a forward, stepwise, multinomial, logistic regression to identify independent predictors of readmission. In total, 428 patients were included in the study. Unplanned OPAT-related hospital readmissions decreased significantly after implementation of the structured OPAT program (17.8% vs 7%; P = .003). OPAT-related readmission reasons included infection recurrence or progression (53%), adverse drug reaction (26%), or line-associated issues (21%). Independent predictors of hospital readmission due to OPAT-related events included vancomycin administration and longer length of outpatient therapy. Clinical cure increased from 69.8% before the intervention to 94.9% after the intervention (P < .001). A structured ID physician and nurse-led OPAT program was associated with a decrease in OPAT-related readmissions and improved clinical cure.

Mackler's Triad in Boerhave Syndrom: Exceptional Case Report

Boerhaave syndrome is a rare entity, difficult to diagnose, with a potentially fatal outcome if not managed rapidly. We report the case of a female patient diagnosed throughout the triad of Meckler and confirmed with CT Scan using a water-soluble contrast product such as gastrografin showing pneumo-mediastinum with important subcutaneous emphysema. Clinically the patient was stable ruling out surgery but requiring a broad-spectrum intravenous antibiotic therapy with monitoring. The evolution was reassuring after a 15 day follow up. The barogenic nature of the rupture probably explains the wide mediastinal contamination, rapidly responsible for severe respiratory distress, sepsis and shock. A careful history and a detailed imaging examination allow a rapid diagnosis and therefore more caution treating the patient.

Oral antibiotics and organ space infection after appendectomy and intravenous antibiotics therapy for complicated appendicitis in children.

There is little consensus regarding management after appendectomy for complicated appendicitis in children. Recent literature suggests that patients may be safely discharged without oral antibiotics after adequate intravenous antibiotics therapy. We conducted a nationwide retrospective cohort study comparing the proportion of postoperative organ space infection between patients discharged with and without oral antibiotics after appendectomy followed by intravenous antibiotics therapy for complicated appendicitis. Using the Diagnosis Procedure Combination database, we identified patients between 3 and 18 years of age who had undergone appendectomy for complicated appendicitis between July 2010 and March 2018. Propensity score matched analyses were performed to compare outcomes between the groups with and without oral antibiotics. The primary outcome was readmission due to organ space infection within 60 days of discharge and the secondary outcome was 60-day readmission due to any reason. Additionally, we conducted a stabilized inversed probability of treatment weighting analysis as a sensitivity analysis. We identified 13,100 eligible patients who had received oral antibiotics (n=3,501) and who had not (n=9,599). Propensity score matching created 2,769 pairs. Readmissions due to organ space infection were 3.4% and 5.2% in the non-users and users of oral antibiotics, respectively (P=0.007). The oral antibiotics users also had a significantly higher proportion of readmission due to any reason than the non-users (5.5% vs 7.4%, P=0.004). The sensitivity analyses demonstrated consistent results. Among children who had undergone appendectomy for complicated appendicitis, oral antibiotics following discharge after adequate intravenous antibiotics therapy may increase organ space infection.

Postoperative complications and oncologic outcomes after multimodal therapy of localized high risk soft tissue sarcoma

BackgroundStandard therapy for localized high-risk soft tissue sarcoma includes surgical resection and neoadjuvant or adjuvant radiation therapy (± chemotherapy and locoregional hyperthermia). No difference in oncologic outcomes for patients treated with neoadjuvant and adjuvant radiation therapy was reported, whereas side effect profiles differ. The aim of this analysis was to analyse oncologic outcomes and postoperative complications in patients treated with multimodal treatment.MethodsOncologic outcomes and major wound complications (MWC, subclassified as wound healing disorder, infection, abscess, fistula, seroma and hematoma) were evaluated in 74 patients with localized high-risk soft tissue sarcoma of extremities and trunk undergoing multimodal treatment, and also separately for the subgroup of lower extremity tumors. Clinical factors and treatment modalities (especially neoadjuvant vs. adjuvant radiotherapy) were evaluated regarding their prognostic value and impact on postoperative wound complications.ResultsOncologic outcomes were dependent on number of high risk features (tumor size, depth to superficial fascia and grading), but not on therapy sequencing (however with higher risk patients in the neoadjuvant group). Different risk factors influenced different subclasses of wound healing complications. Slightly higher MWC-rates were observed in patients treated with neoadjuvant therapy, compared to adjuvant radiotherapy, although only with a trend to statistical significance (31.8% vs. 13.3%, p = 0.059). However, except for wound infections, no significant difference for other subclasses of postoperative complications was observed between neoadjuvant and adjuvant therapy. Diabetes was confirmed as a major risk factor for immune-related wound complications.ConclusionRates of major wound complications in this cohort are comparable to published data, higher rates of wound infections were observed after neoadjuvant radiotherapy. Tumor localization, patient age and diabetes seem to be major risk factors. The number of risk factors for high risk soft tissue sarcoma seem to influence DMFS. Neoadjuvant treatment increases the risk only for wound infection treated with oral or intravenous antibiotic therapy and appears to be a safe option at an experienced tertiary center in absence of other risk factors.

1843. Intravenous versus Partial Oral Antibiotic Therapy in the Treatment of Uncomplicated Bloodstream Infection due to Streptococcus species

Abstract Background Effectiveness of oral antibiotics for transition of therapy in uncomplicated bloodstream infections (BSI) due to Streptococcus species remains unclear. This retrospective cohort study examines effectiveness of partial oral antibiotic regimens in patients with uncomplicated BSI due to Streptococcus species compared to standard intravenous (IV) only therapy. Methods Adult patients with uncomplicated BSI due to Streptococcus species from April 2016 through June 2020 in 7 hospitals within Prisma Health in South Carolina were evaluated. Patients who died within 7 days of BSI were excluded to reduce the impact of survival bias. Multivariate Cox proportional hazards regression was used to examine time to treatment failure, defined as a composite of all-cause mortality and BSI recurrence within 90 days. Results A total of 222 patients with Streptococcus species BSI were included in the analysis. Overall, the median age was 62 years, and 116 (52.3%) were men. Beta-hemolytic streptococci (87; 39.2%) were the most common bloodstream isolates, followed by S. pneumoniae (76; 34.2%) and viridans group streptococci (59; 26.6%). Among this cohort, 99 patients received only IV antibiotics, and the remaining 123 received partial oral therapy. The median duration of therapy in both groups was 14 days, and median duration of IV antibiotics prior to oral transition was 4 days. Most patients in the partial oral group were transitioned to either oral beta-lactams (62; 50.4%) or fluoroquinolones (47; 38.2%). Of the IV only group, 46 (46.5%) required outpatient IV antibiotics. Treatment failure rates were 12.0% and 4.4% in the IV only and partial oral therapy groups, respectively (p=0.04). After adjustments for age, chronic comorbidities, and initial response to therapy within the first 72-96 hours, there was no difference in the risk of treatment failure in the partial oral compared to IV only group (hazards ratio 0.55, 95% CI 0.19-1.64; p=0.28). Conclusion Transitioning patients from IV to oral antibiotics may be a reasonable strategy in the management of uncomplicated BSI due to Streptococcus species. Partial oral therapy does not seem to have a higher treatment failure rate than standard IV only therapy and may spare many patients from outpatient IV antibiotics. Disclosures All Authors: No reported disclosures.

1714. In Vitro Activity of Tebipenem Against Clinically Significant Gram-Positive Bacteria Isolated from Patients with Cancer

Abstract Background Carbapenems represent the most potent and broad-spectrum β-lactams and are minimally affected by most β-lactamase enzymes. however, all carbapenems currently in use including meropenem and ertapenem, are parenterally administered. Tebipenem pivoxil (TBPM-PI-HBr) is a new broad-spectrum orally-administered antibiotic, from the carbapenem subgroup of β-lactam antibiotics. It is the only oral carbapenem and could be an alternative to intravenous injection carbapenem antibiotic therapy. This study aimed to evaluate the in vitro activity of tebipenem, a novel oral carbapenem, against recent gram-positive clinical isolates from cancer patients. Methods We tested 300 gram-positive isolates are recently isolated (2019-2021) from our cancer patients, collected from blood cultures against tebipenem and comparators. Clinical and laboratory Standards Instituted (CLSI) approved broth microdilution method was used with appropriate ATCC controls. MIC50, MIC90, MIC ranges and percent of susceptibility calculations were made using FDA breakpoints when available. There is no tebipenem susceptibility breakpoint for gram-positive isolates currently. MIC90 and MICs range of tebipenem and comparators against 300 gram-positive isolates from cancer patients Results MIC90 and range of tebipenem and comparators are shown in table(1). Tebipenem gave the lowest MIC90 and MIC ranges against most gram-positive isolates including Bacillus species, Corynebacterium species, Enterococcus faecalis, Micrococcus species, MSSA S.aureus, Staphylococcus lugdunensis. β-hemolytic Streptococcus, Streptococcus pneumonie, Viridans group streptococci, and Rothia species. The comparative potency of tebipenem vs meropenem as a carbapenem in this study showed that, tebipenem MIC values were generally lower at least 2-4 fold. Conclusion Our data demonstrate that oral tebipenem has promising activity against clinically significant bacterial pathogens isolated from cancer patients and it has compatible activity to that of meropenem as a carbapenem in this study. Further clinical evolution for oral carbapenem treatment of bacterial infections is warranted. Disclosures All Authors: No reported disclosures.

195 INFECTIVE ENDOCARDITIS POST-TRANSCATHETER AORTIC VALVE IMPLANTATION (TAVI) WITH SYSTEMIC EMBOLIZATION TREATED WITH MEDICAL THERAPY

Abstract Introduction Post-TAVI infective endocarditis is a rare event. The incidence is 3,25%, and it is associate with severe complications and high risk of mortality. Aim The aim of the study is to focus on the possibility of alternative therapy except surgery in treatment of a complicated endocarditis, choice taken also thanks to TEE, through it is possible analyze the integrity of the prosthesis, evidence/absence of rupture or ulceration and monitoring the evolution during therapy. Material and Methods A 76-year-old female patient who went to TAVI, reported fever, increased phlogosis indices and abdominal pain few days after the procedure. Diagnostic imaging resulted in infection of the aortic prosthesis and in thromboembolisms affecting splenic artery and celiac trunk. At TEE an isoechogenic vegetation (14×8 mm) was described in correspondence of aortic prothesis and high gradient was detected. Thromboembolic events have occurred and thrombo-endoarteriectomia of right femoral artery was performed. Staphylococcus Lugdunensis was found in blood cultures and intravenous antibiotic and anticoagulant therapy was undertaken. Results After one month of medical therapy, at TEE significant vegetation reduction was found. Patient was discharged at home, asymptomatic. After 1 month at TTE no sign of endocarditis was detected, blood sample was fine and patient was asymptomatic. Conclusions This case is an example of an early infective process involving biological valve post-TAVI, followed by systemic embolization, in which the only medical therapy was successful. Echocardiography has played a fundamental role to choose the strategy of therapy and to monitor its result.

1024. Transitions of Care Quality Metrics in Patients Discharged on Parenteral Antimicrobial Therapy in a Large Urban Hospital that Lacks a Formal Outpatient Parenteral Antimicrobial Therapy Program

Abstract Background With the evidence demonstrating the need for antimicrobial stewardship in the transition from inpatient to outpatient intravenous (IV) antibiotic therapy, it is imperative to have effective communication and coordination in a multidisciplinary team. Studies have demonstrated the utility of initiating a formal Outpatient Parenteral Antimicrobial Therapy (OPAT) program. The goal of this study is to assess quality metrics in a sample of patients discharged on IV antibiotics prior to initiation of a pilot OPAT program. Methods This is a retrospective, multicenter chart review of patients admitted to Temple University Health System from 10/1/2020 - 10/31/2021 who were discharged on IV antibiotics. There were no exclusion criteria. Patients with multiple admissions were documented as separate occurrences. Qualitative data were collected on the appropriateness of OPAT indication, pathogens targeted, antibiotics used, performance of infectious diseases (ID) consult, line selected, outcomes, and demographics. The primary endpoint is the percentage of global IV antibiotic prescribing errors (antibiotic, dose, route, frequency, duration, parenteral access device). Results There were 748 total discharges on IV antimicrobials in 705 unique patients. We chose a random sample of 109 discharges. Twenty (18%) had an oral antimicrobial available as an option. Antibiotic selection, dosing, duration, and access were correct 92%, 82%, 64% and 65% respectively (Table 2). ID recommended laboratory monitoring for 44 (40%) patients, of which 8 (18%) were sent to ID clinic; all had abnormal findings. Of the 25 patients who required ID follow-up, 11 had a scheduled ID appointment of which 8 attended. There was no mortality within 30 days from the 8 patients, but 2 were readmitted within 30 days. Overall, 39% patients readmitted within 30 days, 6% had mortality within 30 days and 50% were known to have completed therapy. Conclusion Our study captured a 65% rate of prescribing errors in a sample of 109 patients receiving IV antibiotics at discharge. The findings demonstrate an urgent need for an OPAT program to help with antimicrobial, parenteral access selection, monitoring, and follow-up with ID. By implementing this program, we hope to improve our ID follow-up, lab monitoring, and readmission metrics. Disclosures All Authors: No reported disclosures.