179. Identification and Whole Genome Sequencing Analysis of an Oxacillinase (OXA)-48-like-producing Acinetobacter baumannii Outbreak in California, January-May 2021

Background

In January 2021, a California acute care hospital (ACH A), a sentinel site for Acinetobacter baumannii (AB) surveillance, identified OXA-48-like-carbapenemase producing (CP) AB in a patient admitted from a ventilator-equipped skilled nursing facility (vSNF A); OXA-48-like AB had not been previously reported in the United States.

Methods

Our investigation included onsite infection control (IC) assessments, contact tracing, and point prevalence surveys (PPS) at vSNF A. The Antibiotic Resistance (AR) Laboratory Network performed carbapenemase testing on AB isolates (including those from ACH A) and PPS swabs. A case was defined as a patient with an OXA-48-like AB isolate, or an epidemiologically-linked patient with an OXA-48-like gene detected via screening. We performed whole genome sequencing (WGS) of OXA-48-like AB and other CP organisms on the Illumina MiSeq and Oxford Nanopore MinION for short and long read sequencing, respectively.

Results

Since January 2021, we have identified five OXA-48-like AB cases (including the index), six OXA-48-like cases (no organism recovered), and six patients with other CP organisms at ACH A and vSNF A. Since August 2019, vSNF A has concurrently been experiencing an OXA-109 AB outbreak. A second vSNF A patient, Patient 2, who overlapped with the index patient, had OXA-48-like Klebsiella pneumoniae (KP) (November 2019) and OXA-109 AB (May 2020) isolates. WGS of the index patient’s AB and Patient 2’s KP isolates identified a rare OXA-48-like gene located on the AB chromosome and a KP plasmid. The OXA-48-like AB was also carrying an OXA-109 gene, and hqSNP analysis indicated it varied by 9-44 single-nucleotide polymorphisms (SNPs) from 14 OXA-109 AB isolates linked to that outbreak, and 0-3 SNPs from the other OXA-48-like AB case isolates.

Figure 1. Phylogenetic Tree Comparison of OXA-109 AB and OXA-48-like AB Isolates

Figure 2. Epidemic Curve of OXA-109 AB, OXA-48-like AB, and Other CP Organism Cases, 2019-2021

Conclusion

The first reported case of OXA-48-like AB in the US was identified through public health sentinel laboratory surveillance, allowing prompt response to contain spread of a novel multidrug-resistant organism (MDRO). WGS detected a rare OXA-48-like gene in AB and KP and provides evidence for possible interspecies transfer of this gene from KP to AB through plasmid transfer followed by chromosomal integration.

Disclosures

All Authors: No reported disclosures

Increasing patient involvement in the diabetic foot pathway: a pilot randomized controlled trial

AIMS

This pilot study aimed to explore whether the use of an intervention to increase shared decision-making (Decision Navigation) increased decision self-efficacy and foot-treatment adherence in patients with a diabetic foot ulcer.

METHODS

Fifty-six patients with a diabetic foot ulcer were randomized to receive Decision Navigation (N = 30) or usual care (N = 26). Primary outcomes included decision self-efficacy, adherence to foot treatment as reported by the participant and adherence to foot treatment as reported by the clinician. Secondary outcomes included foot ulcer healing rate, health-related quality of life, decision conflict and decision regret.

RESULTS

Despite participants rating Decision Navigation as very helpful, mixed analyses of variance revealed no differences in decision self-efficacy or adherence between those receiving Decision Navigation and those receiving usual care. There were no differences between groups with regards to the secondary outcomes, with the exception of decision conflict which increased over time (12 weeks) for those receiving Decision Navigation.

CONCLUSIONS

An intervention that facilitated patient involvement in treatment decisions did not have any impact on decisional confidence or adherence to foot treatment. This does not provide support for the suggestion that personalized care can improve health-related outcomes at this progressed stage of the patient's disease trajectory. We suggest that the diabetic foot population may benefit from interventions aimed at increasing motivation to engage with care pathways, centred on challenging personal controllability beliefs.

[Pott's disease (about 16 cases)]

INTRODUCTION

Pott's disease or spinal tuberculosis is rare, but represents the most common form of osteo-articular tuberculosis in endemic countries.

MATERIAL AND METHODS

[corrected] From January 2000 to December 2010, we collected 16 cases of Pott's disease. We analyzed clinical and radiological profile, means of confirmation and treatment.

RESULTS

Spinal and chest pain were the most frequent signs. Four patients had neurological signs. The diagnosis was made by the detection of bacillus in the pus of paravertebral abscess in six cases, by histological study of vertebral biopsy in five cases, biopsy of another associated lesion in one case and in front of radio-clinical arguments with good clinical evolution under antibacillary treatment in four cases. The antibacillary treatment associating four drugs was indicated and correctly followed by all patients. Surgical drainage was associated in five cases. The evolution was good in all cases.

DISCUSSION

Diagnosis of Pott's disease is late when there is no neurological sign. Imaging allows to make early diagnosis with MRI. Prognosis is good when treatment is started early.

[Multicystic lung revealing a Sjogren's syndrome]

The Sjogren's syndrome is a chronic inflammatory autoimmune disease that affects primarily the exocrine glands, but can affect other organs particularly the lungs. Cystic lung disease is very significant but exceptionally recounted in the literature. We report the case of a patient, 54 years old, whose disease was discovered incidentally after a routine chest radiograph. The diagnosis of cystic lung revealing a primary Sjogren's syndrome was held before a group of radio-clinical, immunological and histological arguments. Through our observation, the diagnosis of Sjogren's syndrome should be included in the list of diagnoses to raise in a multicystic lung.

[Multiple pulmonary hydatid disease with cardiovascular localisation]

Multiple thoracic hydatid disease is rare. Cardiovascular localisation is exceptional. Clinical, radiological and even electrocardiographic signs are not specific. The diagnosis is often difficult. We report a case of multiple pulmonary hydatid disease associated to a hydatid cyst of the infundibulum of the pulmonary artery. This is presented in a young man, aged 21 years, in good physical health, with recurrent minimal haemoptysis dating back two years ago. The authors emphasise, throughout this case history, the difficulties of diagnosis and treatment of multiple hydatid cysts especially with cardiovascular localisation.