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Introduction: The prevalence of Francisella tularensis in Minnesota ticks is unknown. Ticks collected at seven sites were tested to determine the infection prevalence of F. tularensis in D...

Background Canine brucellosis , caused by the bacterium Brucella canis , is a zoonotic and largely reproductive disease of dogs. The disease is a recognized problem in canine breeding populations, and the risk to individuals assisting with birthing is well described. Prior to 2015, all cases of canine brucellosis reported to the Minnesota Board of Animal Health were in dogs used for breeding. In 2015, canine brucellosis was identified in eight Minnesota rescue dogs, all originating from specific geographic areas in South Dakota. Our objective was to measure the seroprevalence of B. canis in stray and previously owned dogs entering a large Minnesota animal rescue organization to determine if our observations represented a localized or generalized disease issue among rescue dogs. Methods A stratified random sample of stray and previously owned dogs entering the largest Minnesota animal rescue organization between November 1, 2016 and November 7, 2017, was tested for B. canis antibodies by the 2-Mercaptoethanol Rapid Slide Agglutination Test (2ME-RSAT) (Zoetis d -TEC® CB kit). Sample sizes for each strata were calculated using previously published seroprevalence estimates. Blood from selected dogs was collected, serum harvested, and transported to the Minnesota Veterinary Diagnostic Laboratory for testing. Positive samples in the 2ME-RSAT were shipped to Cornell University for confirmation by Agarose Gel Immunodiffusion (AGID) testing. Demographics, state and setting of origin, and health status were collected on study-dogs. Results Of the 10,654 dogs accepted by AHS during the study period, 943 (8.9%) were selected for testing. Most study dogs arrived from Oklahoma (28%), Alabama (18%), and Minnesota (12%). The median age of study dogs was 1.5 years; 303 (32%) were intact males and 294 (31%) were intact females. Most study dogs were strays (n = 716, 76%). Of the total, 22 (3.1%) stray and eight (3.5%) owner-surrendered dogs were presumptively positive by RSAT; one (0.11%) of the stray dogs was positive by 2ME-RSAT and confirmed by AGID. The positive dog was a healthy-appearing 1 year-old neutered male beagle from Texas. Conclusions The seroprevalence of canine brucellosis in dogs entering Minnesota for adoption from multiple states was low. Never-the-less, care must to be taken to consider all potential risks and outcomes of interstate and international dog trade, including the spread of infectious diseases such as canine brucellosis.

Q fever is a widely distributed, yet, neglected zoonotic disease, for which domestic ruminants are considered the main reservoirs in some countries. There are still many gaps in our knowledge of its epidemiology, and the source of sporadic cases is often not determined. In this study, we show how Q fever surveillance data in combination with information routinely collected by government agencies in Minnesota during 1997 to 2015 can be used to characterize patterns of occurrence of Q fever illnesses and detect variables potentially associated with increased human illness. Cluster analysis and Bayesian spatial regression modeling revealed the presence of areas in Southern Minnesota at higher risk of Q fever. The number of sheep flocks at the county level helped to explain the observed number of human cases, while no association with the cattle or goat population was observed. Our results provide information about the heterogeneous spatial distribution of risk of Q fever in Minnesota.

We assessed the appropriateness of initiating antibiotics in 49 nursing home (NH) residents receiving antibiotics for urinary tract infection (UTI) using 3 published algorithms. Overall, 16 residents (32%) received prophylaxis, and among the 33 receiving treatment, the percentage of appropriate use ranged from 15% to 45%. Opportunities exist for improving UTI antibiotic prescribing in NH.Infect Control Hosp Epidemiol 2017;38:998–1001

The majority of paediatric Clostridioides difficile infections (CDI) are community-associated (CA), but few data exist regarding associated risk factors. We conducted a case–control study to evaluate CA-CDI risk factors in young children. Participants were enrolled from eight US sites during October 2014–February 2016. Case-patients were defined as children aged 1–5 years with a positive C. difficile specimen collected as an outpatient or ⩽3 days of hospital admission, who had no healthcare facility admission in the prior 12 weeks and no history of CDI. Each case-patient was matched to one control. Caregivers were interviewed regarding relevant exposures. Multivariable conditional logistic regression was performed. Of 68 pairs, 44.1% were female. More case-patients than controls had a comorbidity (33.3% vs. 12.1%; P = 0.01); recent higher-risk outpatient exposures (34.9% vs. 17.7%; P = 0.03); recent antibiotic use (54.4% vs. 19.4%; P < 0.0001); or recent exposure to a household member with diarrhoea (41.3% vs. 21.5%; P = 0.04). In multivariable analysis, antibiotic exposure in the preceding 12 weeks was significantly associated with CA-CDI (adjusted matched odds ratio, 6.25; 95% CI 2.18–17.96). Improved antibiotic prescribing might reduce CA-CDI in this population. Further evaluation of the potential role of outpatient healthcare and household exposures in C. difficile transmission is needed.

OBJECTIVETo facilitate surveillance and describe the burden of healthcare-associated infection (HAI) in nursing homes (NHs), we compared the quality of resident-level data collected by NH personnel and external staff.DESIGNA 1-day point-prevalence surveySETTING AND PARTICIPANTSOverall, 9 nursing homes among 4 Centers for Disease Control and Prevention (CDC) Emerging Infection Program (EIP) sites were included in this study.METHODSNH personnel collected data on resident characteristics, clinical risk factors for HAIs, and the presence of 3 HAI screening criteria on the day of the survey. Trained EIP surveillance officers collected the same data elements via retrospective medical chart review for comparison; surveillance officers also collected available data to identify HAIs (using revised McGeer definitions). Overall agreement was calculated among residents identified by both teams with selected risk factors and HAI screening criteria. The impact of using NH personnel to collect screening criteria on HAI prevalence was assessed.RESULTSThe overall prevalence of clinical risk factors among the 1,272 residents was similar between NH personnel and surveillance officers, but the level of positive agreement (residents with factors identified by both teams) varied between 39% and 87%. Surveillance officers identified 253 residents (20%) with ≥1 HAI screening criterion, resulting in 67 residents with an HAI (5.3 per 100 residents). The NH personnel identified 152 (12%) residents with ≥1 HAI screening criterion; 42 residents had an HAI (3.5 per 100 residents).CONCLUSIONWe identified discrepancies in resident-level data collection between surveillance officers and NH personnel, resulting in varied estimates of the HAI prevalence. These findings have important implications for the design and implementation of future HAI prevalence surveys.Infect Control Hosp Epidemiol 2016;1440–1445

Tularemia is a rare but often serious infectious disease caused by Francisella tularensis, a bacterium with an extremely low infectious dose and the ability to cause illness through several routes including arthropod bites, contact with infected animals and exposure to contaminated water, food or soil. Tularemia is found throughout the northern hemisphere, and cases have occurred in all U.S. states except Hawaii. Thirteen cases have been reported to the Minnesota Department of Health since 1994, including 3 in 2016. This article presents the 2016 cases as well as data on all the reported cases. Clinicians should consider tularemia in patients with a compatible clinical illness and exposure history, particularly those who present with acute fever and regional lymphadenopathy. Treatment should be initiated early in highly suspect cases, without waiting for laboratory results.

Infectious Diseases Society of America/Society for Healthcare Epidemiology of America (IDSA/SHEA) guidelines describe recommended therapy for Clostridioides difficile infection (CDI). To describe CDI treatment and, among those with severe CDI, determine predictors of adherence to the 2010 IDSA/SHEA treatment guidelines. We analyzed 2013–2015 CDI treatment data collected through the Centers for Disease Control and Prevention’s Emerging Infections Program. Generalized linear mixed models were used to identify predictors of guideline-adherent therapy. A CDI case was defined as a positive stool specimen in a person aged ≥ 18 years without a positive test in the prior 8 weeks; severe CDI cases were defined as having a white blood cell count ≥ 15,000 cells/μl. Prescribing and predictors of guideline-adherent CDI therapy for severe disease. Of 18,243 cases, 14,257 (78%) were treated with metronidazole, 7683 (42%) with vancomycin, and 313 (2%) with fidaxomicin. The median duration of therapy was 14 (interquartile range, 11–15) days. Severe CDI was identified in 3250 (18%) cases; of 3121 with treatment data available, 1480 (47%) were prescribed guideline-adherent therapy. Among severe CDI cases, hospital admission (adjusted odds ratio [aOR] 2.48; 95% confidence interval [CI] 1.90, 3.24), age ≥ 65 years (aOR 1.37; 95% CI 1.10, 1.71), Charlson comorbidity index ≥ 3 (aOR 1.27; 95% CI 1.04, 1.55), immunosuppressive therapy (aOR 1.21; 95% CI 1.02, 1.42), and inflammatory bowel disease (aOR 1.56; 95% CI 1.13, 2.17) were associated with being prescribed guideline-adherent therapy. Provider adherence to the 2010 treatment guidelines for severe CDI was low. Although the updated 2017 CDI guidelines, which expand the use of oral vancomycin for all CDI, might improve adherence by removing the need to apply severity criteria, other efforts to improve adherence are likely needed, including educating providers and addressing barriers to prescribing guideline-adherent therapy, particularly in outpatient settings.

Adherence to clinical guidelines is recommended to promote appropriate antibiotic use in dentistry and address concerns about increasing antibiotic resistance. Guidelines for antibiotic prophylaxis before invasive dental procedures were updated in 2007 and 2015. In an effort to inform antibiotic stewardship efforts, a study was undertaken to assess the knowledge of antibiotic usage guidelines and antibiotic-prescribing practices among Minnesota dentists. During September 2015, a 22-question online survey was sent to the state dental association membership. Among 437 respondents, dentists reported a median of 4 antibiotic prophylaxis and 5 treatment prescriptions per month. Dentists reported prescribing antibiotics for prophylaxis before invasive dental procedures for patients with "high-risk conditions" (84%) and localized swelling (70%) as well as for a number of reasons that are not recommended by current guidelines, such as an upcoming vacation for the patient (38%), gingival pain (38%), legal concerns (24%), patient demand (22%), and failed local anesthesia (21%). Dentists defined high-risk conditions as a history of infective endocarditis (75%), prosthetic cardiac valve (70%), selected congenital heart disease (68%), cardiac transplantation with cardiac valvulopathy (4%), and primary care physician recommendation (59%). In addition, some dentists assigned a high-risk category to conditions that do not fall within current guideline recommendations, including prosthetic joints (39%), poorly controlled type 2 diabetes (27%), human immunodeficiency virus (18%), chronic kidney disease (13%), mitral valve prolapse (11%), all congenital heart disease (4%), and well-controlled type 2 diabetes (1%). Respondents indicated that common challenges to stewardship of antibiotic use included perceived conflicting provider guidelines (44%), conflicting scientific evidence (44%), or lack of information on antibiotic selection (19%) or risks (23%). Dentists reported greater antibiotic use than currently recommended by existing guidelines. Antibiotic stewardship efforts in dentistry should address challenges to guideline adherence.

Background An increasing proportion of Clostridium difficile infections (CDI) in the United States are community-associated (CA). We conducted a case-control study to identify CA-CDI risk factors. Methods We enrolled participants from 10 US sites during October 2014–March 2015. Case patients were defined as persons age ≥18 years with a positive C. difficile specimen collected as an outpatient or within 3 days of hospitalization who had no admission to a health care facility in the prior 12 weeks and no prior CDI diagnosis. Each case patient was matched to one control (persons without CDI). Participants were interviewed about relevant exposures; multivariate conditional logistic regression was performed. Results Of 226 pairs, 70.4% were female and 52.2% were ≥60 years old. More case patients than controls had prior outpatient health care (82.1% vs 57.9%; P < .0001) and antibiotic (62.2% vs 10.3%; P < .0001) exposures. In multivariate analysis, antibiotic exposure—that is, cephalosporin (adjusted matched odds ratio [AmOR], 19.02; 95% CI, 1.13–321.39), clindamycin (AmOR, 35.31; 95% CI, 4.01–311.14), fluoroquinolone (AmOR, 30.71; 95% CI, 2.77–340.05) and beta-lactam and/or beta-lactamase inhibitor combination (AmOR, 9.87; 95% CI, 2.76–340.05),—emergency department visit (AmOR, 17.37; 95% CI, 1.99–151.22), white race (AmOR 7.67; 95% CI, 2.34–25.20), cardiac disease (AmOR, 4.87; 95% CI, 1.20–19.80), chronic kidney disease (AmOR, 12.12; 95% CI, 1.24–118.89), and inflammatory bowel disease (AmOR, 5.13; 95% CI, 1.27–20.79) were associated with CA-CDI. Conclusions Antibiotics remain an important risk factor for CA-CDI, underscoring the importance of appropriate outpatient prescribing. Emergency departments might be an environmental source of CDI; further investigation of their contribution to CDI transmission is needed.

Background Incidence of Clostridium difficile infection (CDI) in children has been shown to be highest among those aged 1 to 3 years, with similar clinical presentation, disease severity, and outcomes as older children. In addition, a large proportion of CDI in children are community-associated (CA), but few data exist regarding associated risk factors. We sought to identify CA-CDI risk factors in younger children. Methods We enrolled children from 8 geographically-diverse U.S. sites during October 2014–February 2016. Case-patients were defined as children aged 12–60 months with a positive C. difficile stool specimen collected as an outpatient or within 3 days of hospitalization, who had no healthcare facility admission in the prior 12 weeks and no history of CDI. Each case-patient was matched to one randomly selected control (child with no prior history of CDI) by site and age group. Caretakers were interviewed about participants’ relevant exposures in the 12 weeks prior to case-patient’s illness onset date; univariate analysis was performed using exact conditional logistic regression. Results Of 138 children, 43.5% were female; 69.6% were 12–23 months old. A significantly higher proportion of cases than controls had: an underlying chronic medical condition (33.3% vs 11.9%; P = 0.02); a neonatal intensive care unit (NICU) stay at time of birth (26.9% vs 13.2%; P = 0.04); or recent antibiotic exposure (53.6% vs 20.6%; P = 0.0001). More cases than controls had recent higher-risk outpatient healthcare exposures (emergency department, outpatient procedure and surgical centers, hospital-based outpatient settings, or urgent care) (34.9% vs 19.1%; P = 0.06) or a household member with diarrhea (36.2% vs 20.6%; P = 0.05). No difference was found in the proportion of cases and controls who had a feeding tube (2.9% vs 0%; P = 0.50) or a recent exposure to gastric acid suppressants (6.1% vs 2.9%; P = 0.63). Conclusion Young children with underlying disease, NICU stay, or recent antibiotic use might be at higher risk for CA-CDI. Improving outpatient antibiotic use, particularly among children with comorbidities, might reduce CA-CDI in this population. Further investigation of other risk factors, including outpatient healthcare and household exposures, is needed. Disclosures All authors: No reported disclosures.

Background. On March 3, 2015, the Minnesota Department of Health (MDH) was alerted to an outbreak of HPAI H5N2 in a commercial turkey flock in Pope County. During March 3–June 5, 104 infected flocks were identified. Although the risk of bird to human transmission with this strain was perceived to be low, transmission of other HPAI H5 strains from poultry to humans has been previously documented. Methods. Poultry farm personnel working with infected flocks were interviewed about exposures and contacted once daily for 10 days to monitor for eye infections or respiratory symptoms: cough, fever, sore throat, and runny nose. Antiviral medication was recommended for those with direct contact with HPAI H5N2 infected flocks without proper use of recommended personal protective equipment (PPE). MDH coordinated testing for those reporting symptoms. Nasopharyngeal and conjunctival swabs were collected and tested at MDH – PHL for avian influenza using the CDC Influenza A/H5 RT-PCR assay. Results. During March 3–June 16, MDH attempted to contact 439 people associated with 104 flocks. Of those, 379 (86%) were interviewed, evaluated for exposure, and monitored for symptoms and 60 (14%) were lost to follow up or refused monitoring. Of the 379 evaluated for exposure, 194 (51%) reported direct contact without appropriate PPE and were advised to take antiviral medications as a precaution; 138 (71%) agreed. Lack of appropriate PPE ranged from using no PPE to missing a single PPE component. The most commonly missing PPE component was goggles (162, 84%). Fifteen (4%) of the 379 monitored personnel had symptoms and were tested at the MDH-PHL within 15 days of symptom onset. Influenza A/H5 was not detected in any of the samples. Conclusions. Although multiple opportunities for viral transmission existed, no human infections were documented with this outbreak. Interviews with poultry farm personnel allowed MDH to identify gaps in PPE use, educate workers on the importance of rigorous PPE use, and offer antiviral medication. Monitoring of personnel exposed to avian influenza allows public health to quickly identify transmission events from poultry to exposed workers so risk of infection can be understood and appropriate public health measures implemented. Disclosures. All authors: No reported disclosures.

On June 27, 2016, the Minnesota Department of Health (MDH) Public Health Laboratory (PHL) was notified of a suspected Francisella tularensis isolate cultured at a hospital laboratory. The isolate was confirmed as F. tularensis type B at MDH PHL by reverse transcription-polymerase chain reaction, culture, and direct fluorescent antibody testing. Francisella tularensis subspecies tularensis (type A) and holarctica (type B) bacteria are the causative agents of tularemia.

Reptile-associated salmonellosis (RAS) occurs when Salmonella is transmitted from a reptile to a human. This study describes the epidemiology of RAS in Minnesota during 1996-2011. All Minnesotans with confirmed Salmonella infections are reported to the Minnesota Department of Health (MDH). Case patients are interviewed about illness characteristics and risk factors, including foods eaten, drinking and recreational water exposures, contact with ill people, and animal contact. Willing RAS case patients can submit stool from the reptile for culture. Serotype and pulsed-field gel electrophoresis (PFGE) subtype of Salmonella isolates from reptiles and case patients are compared. Of 8389 sporadic (not associated with an outbreak) non-typhoidal salmonellosis case patients in Minnesotans during 1996-2011, 290 (3.5%) reported reptile exposure. The median age of case patients with reptile exposure was 11 years, 31% were under the age of 5 years and 67% were under the age of 20 years; 50% were female. The median illness duration was 8 days; 23% required hospitalization. The most commonly reported reptile exposures were lizard (47%), snake (20%), turtle (19%) and a combination of reptile types (14%). Eighty-four per cent of isolates from case patients who reported reptile exposure were Salmonella enterica subspecies I. The three most common serotypes were Typhimurium (15%), Enteritidis (7%) and subspecies IV serotypes (7%). Of 60 reptiles testing positive for Salmonella, 36 (60%) yielded the same Salmonella serotype as the human isolate. Twenty-six of 27 reptile isolates that were subtyped by PFGE were indistinguishable from the human isolate. Of these, 88% were subspecies I; the most common serotypes were Enteritidis (12%), Typhimurium (8%), and Bareilly (8%). RAS accounts for approximately 3.5% of salmonellosis cases in Minnesota, primarily affecting children. The majority of isolates from case patients and reptiles belonged to Salmonella subspecies I, suggesting that reptiles are a source of human infection with serotypes not traditionally considered to be reptile-associated.

Background Clostridium difficile infections (CDIs) are the leading cause of healthcare-associated diarrhea. Two of the most significant risk factors for CDI are antibiotic use and healthcare exposure. Dentists write approximately 10% of all outpatient prescriptions in the USA; however, limited data are available regarding dental prescribing’s impact on CDI. We described characteristics of community-associated (CA) CDI cases following antibiotics for dental procedures. Methods The Minnesota Department of Health (MDH) performs active population- and laboratory-based surveillance for CDI as part of the CDC’s Emerging Infections Program (EIP). A case was defined as a positive C. difficile toxin or molecular assay on a stool specimen from a person >1 years old without a positive test in the prior 8 weeks, living in one of the five EIP catchment counties. Cases were classified as CA if stool was collected ≤3 days of admission or as an outpatient, with no overnight stay in a healthcare facility in the past 12 weeks. Medical records were reviewed and interviews performed to assess CDI risk factors and potential exposures. Differences in antibiotic prescribing and documentation among CA CDI cases receiving dental procedures were explored. Results During 2009–2015, 2176 presumptive CA CDI cases were reported to MDH; 1626 (75%) were confirmed as CA and interviewed. In total, 926 (57%) were prescribed antibiotics and 136 (15%) for dental procedures. Cases prescribed antibiotics for dental procedures were significantly older (median age: 57 vs. 45 years, P Conclusion Dental antibiotic prescribing rates are likely underestimated. Stewardship programs should address dental prescribing and alert dentists to CDI subsequent to antibiotics prescribed for dental procedures. Disclosures All authors: No reported disclosures.

Background: Long-term care facility (LTCF) residents are at higher risk for developing Clostridium difficile infections (CDI). Both Minnesota (MN) and New Mexico (NM) perform active populationbased surveillance for CDI in select counties. While both states have historically similar overall CDI incidence rates, the proportion of LTCF-onset CDI is much higher in NM. We compared surveillance data from the two states to identify differences. Methods: We analyzed population-based CDI data from January 1, 2011– September 30, 2013. A CDI case was defined as a stool specimen positive for C. difficile obtained from a patient without a C. difficile-positive specimen in the previous 8 weeks. A CDI case was classified as LTCF-onset if positive stool specimen was collected in a LTCF or within 3 days after hospital admission from a LTCF. A medical record review was performed on all LTCF-onset CDI cases in MN and a 10% random sample in NM. LTCF utilization data was obtained from the 2012 Area Resource File. Chi-square test was used for comparisons across the two states. Results: A total of 1597 and 3289 CDI cases were identified in MN and NM, respectively. Among all CDI cases, MN cases were less likely to be LTCF-onset (7% vs. 28%; p