Polymicrobial Keratitis of Pseudomonas aeruginosa, Acinetobacter baumannii, and Ochrobactrum anthropi

PURPOSE: To report polymicrobial keratitis involving Pseudomonas aeruginosa, Acinetobacter baumannii, and Ochrobactrum anthropi. CASE SUMMARY: A 53-year-old female complained of pain and secretion in her right eye, which started 6 weeks before her visit. She applied steroid ointment, which was received from the dermatologist, to her eyelid 7 days prior to her visit but this treatment worsened her symptoms. At the initial visit, the visual acuity of the right eye was light perception, and purulent secretions were observed. Using a slit lamp, severe conjunctival hyperemia, hypopyon, and a ring-shaped central corneal ulcer were observed. The anterior chamber and fundus were not observed due to corneal lesions but ultrasonography showed no intraocular inflammation. Infectious keratitis was suspected and cultured by corneal scraping. During the incubation period, 0.5% moxifloxacin, 2% voriconazole, and 1% cyclopentolate were administered. A total of 400 mg of moxifloxacin and 100 mg of doxycycline were given orally. In the primary culture, Pseudomonas aeruginosa and Acinetobacter baumannii were identified so 5% ceftazidime, which was sensitive for the antibiotic susceptibility results was further instilled. Thereafter, the keratitis improved but the keratitis again worsened while maintaining the topical treatment. A secondary culture was positive for Ochrobactrum anthropi. Treatment with 1.4% gentamicin, which was sensitive for the antibiotic susceptibility test was added and the keratitis improved. A conjunctival flap was performed because of the increased risk of perforation. CONCLUSIONS: We report polymicrobial keratitis involving Pseudomonas aeruginosa, Acinetobacter baumannii, and Ochrobactrum anthropi for the first time in the Republic of Korea.

Presencia de Ochrobactrum anthropi en muestras de semen / Presence of Ochrobactrum Anthropi in Semen Samples

Introducción: El semen es una mezcla compleja de fluidos y células que posee las condiciones adecuadas para albergar microorganismos, especialmente bacterias. Objetivo: Evaluar la presencia de bacterias en el semen de individuos normozoospérmicos asintomáticos para infecciones urogenitales. Métodos: Se realizó una secuenciación estándar posterior a la amplificación por PCR con el uso de los cebadores universales 27F y 1492R para identificación de bacterias, en 10 muestras de semen de voluntarios normozoospérmicos asintomáticos para infecciones urogenitales. Resultados: Se identificó a Ochrobactrum anthropi en 8 de las 10 muestras seminales evaluadas y a Haemophilus paraurethrae o Escherichia coli en los dos restantes. O. anthropi es una bacteria comensal, ampliamente distribuida en la naturaleza, especialmente en las fuentes de agua que, a pesar de su baja virulencia, ocasionalmente causa infecciones en individuos inmunocomprometidos. Conclusión: La alta frecuencia de O. anthropi en las muestras de semen de individuos normozoospérmicos asintomáticos para infecciones urogenitales puede asociarse a procesos de contaminación durante la recolección de la muestra, debido a la amplia distribución de esta bacteria, especialmente en las fuentes de agua(AU)

Introduction: Semen is a complex combination of fluids and cells that can harbor microorganisms, especially bacteria. Objective: To assess the presence of bacteria in semen samples from asymptomatic normozoospermic individuals, for urogenital infections. Methods: Standard sequencing after PCR amplification was performed with the use of the universal primers 27F and 1492R for bacterial identification, in 10 semen samples of asymptomatic normozoospermic volunteers for urogenital infections. Results: Thisidentified Ochrobactrum anthropi in 8 out of 10 samples assessed. In the remaining two samples, we identified Haemophilus paraurethrae and Escherichia coli. O. anthropi is a commensal bacterium, widely spread in nature, especially in water sources that, despite its low virulence, occasionally cause infections in immune compromised individuals. Conclusion: The high frequency of O. anthropi in semen samples from asymptomatic normozoospermic individuals, for urogenital infections can be associated with contamination during the collection of the sample, due to the wide distribution of this bacterium, especially in water sources(AU)

The effectiveness of methanotrophic bacteria and Ochrobactrum anthropi to reduce CH4 and N2O emissions and to promote paddy growth in lowland paddy fields

Aims: Paddy field is one of the sources of greenhouse gasses such as methane (CH4) and nitrous oxide (N2O), which causes global warming and other negative effects in agricultural sector. An alternative to optimize paddy productivity and reduce emissions of CH4 and N2O is by using methanotrophic bacteria and Ochrobactrum anthropi BL2. Methodology and results: This study consisted of two parts, i.e. positive control and experimental treatments. Positive control consisted of 250 kg/ha NPK inorganic fertilizer NPK (15:15:15) (100% of the recommended normal dose) without any methanotrophic bacteria. Meanwhile the experimental treatment consisted of 50 kg/ha inorganic fertilizers NPK (20% of the recommended normal dose) with methanotrophic bacteria (Methylocystis rosea BGM 1, M. parvus BGM 3, Methylococcus capculatus BGM 9, Methylobacter sp. SKM 14) and N2O reducing bacteria (Ochrobactrum anthropi BL2). Using weight indicator of 1000 grams, all the bacteria are capable of increasing paddy productivity by 42.07%, compared to conventional method which can only increase the productivity by 2.51% (Cepy and Wangiyana, 2011). The increasing productivity and growth of paddy plants were due to the nitrogen fixation activity of M. rosea BGM 1, M. capculatus BGM 9, and Methylobacter sp. SKM 14. In the experimental treatment using bacteria, the emission of CH4 and N2O was reduced with the highest CH4 and N2O sinks of 24018.8 mol CH4/day/ha and 68.48 mol N2O/day/ha, respectively. However, the positive control treatment with 100% of the recommended fertilizer dose showed the highest CH4 and N2O emissions which were up to 74346.45 mol CH4/day/ha and 26.21 mol N2O/day/ha, respectively. Conclusion, significance and impact study: All the methanotropic bacteria and O. anthropi BL2 are significantly increase paddy production, compared to positive control treatment. The addition of bacteria in paddy fields results in CH4 and N2O sinks.

Ochrobactrum anthropi bacteremia in a preterm infant with cystic fibrosis

Ochrobactrum anthropi infection in newborn patients is rare, and the treatment is challenging because of its widespread and unpredictable resistance to antimicrobial agents and discrepancies between in vitro susceptibility and in vivo efficacy. We report the clinical and microbiological characteristics of Ochrobactrum anthropi bacteremia in a preterm patient.

Bacteriemia por Ochrobactrum anthropi en paciente en hemodiálisis por catéter tunelizado permanente: Caso clínico / Catheter associated bacteremia caused by Ochrobactrum anthropi in a patient on hemodialysis: Report of one case

Ochrobactrum anthropi is a rare pathogen in humans that is usually related to infections in inmunocompromised patients or people with indwelling medical devices. There are very few reported cases of O. anthropi bacteremia in patients on hemodialysis. We report a 19-year-old female on hemodialysis through a jugular catheter, with fever and malaise lasting one month. The catheter was withdrawn and Ochrobactrum anthropi was isolated from it and from blood cultures. The patient was successfully treated with levofloxacin.

Prosthetic aortic valve endocarditis due to Ochrobactrum anthropi.

Ochrobactrum anthropi is an emerging pathogen increasingly affecting the immunocompromised host. Only four cases of infective endocarditis have been documented in literature. Therapeutic approach is a rising challenge as it is resistant to most of the currently available beta lactam antibiotics with the exception of carbapenems. We report a case of prosthetic valve endocarditis secondary to Ochrobactrum anthropi infection; the host was temporarily immunocompromised due to disseminated herpes zoster after surgery.

A Case of Continuous Ambulatory Peritoneal Dialysis Related Peritonitis Caused by Ochrobactrum anthropi / 대한신장학회지

Ochrobactrum anthropi is a ubiquitous gram-negative bacillus and currently thought to be an opportunistic pathogen. We experienced a 66-year-old male patient with continuous ambulatory peritoneal dialysis (CAPD)-related peritonitis caused by O. anthropi. Susceptible antibiotic therapy including amikacin and ciprofloxacin improved the patient's clinical status. However, peritoneal effluent showed sustained leukocytosis, thus CAPD catheter was removed. After 2 weeks of temporary hemodialysis, CAPD was successfully restarted with reinsertion of catheter. This is, to our knowledge, the first case of CAPD-related peritonitis caused by O. anthropi in Korea.

Bacteriemia relacionada a catéter por Ochrobactrum anthropi / Catheter-associated bacteremia caused by Ochrobactrum anthropi

Ochrobactrum anthtropi es un bacilo gram negativo aeróbico, no fermentador de la glucosa, anteriormente conocido como Achromobacter sp o CDC grupo Vd. Ha sido aislado del medio ambiente y de infecciones en seres humanos que generalmente presentaban algún tipo de inmunocompromiso. Las infecciones por este microorganismo fueron bacteriemias relacionadas a catéteres y en ocasiones endoftalmitis, infecciones urinarias, meningitis, endocarditis, absceso hepático, osteocondritis, absceso pelviano y absceso pancreático. Se presenta el caso de un paciente de sexo masculino, de 69 años de edad, que consultó a la guardia por hipotensión sostenida y síndrome febril de cuatro días de evolución, escalofrío, sudoración profusa y deterioro del sensorio. El paciente tenía diabetes de tipo 2 y antecedente de accidente cerebrovascular. Debido a insuficiencia renal crónica presentaba un catéter de doble lumen para la diálisis. Se documentó una bacteriemia relacionada a catéter por cultivo de sangre a través de catéter y de vena periférica, utilizando el sistema automatizado de hemocultivos Bact-Alert y la metodología de tiempo diferencial (>120min). La confirmación se realizó, una vez removido el catéter, por la técnica semicuantitativa de Maki (> 15 UFC). El microorganismo fue identificado por API 20NE y Vitek 1 como Ochrobactrum anthropi.

Ochrobactrum anthropi is a non-glucose fermentative, aerobic gram-negative bacillus, formerly known as Achromobacter sp or CDC group Vd. It has been isolated from the environment and from infections in usually immunocompromised human beings. The documented infections frequently involved catheter related bacteremia whereas endophthalmitis, urinary infections, meningitis, endocarditis, hepatic abscess, osteochondritis, pelvic abscess and pancreatic abscess were rarely involved. Here it is presented the case of a male patient aged 69 years with sustained hypotension, four day febrile syndrome, chill, lavish perspiration and sensorium deterioration. He had type 2 diabetes and antecedent of cerebrovascular accident. A double-lumen dialysis catheter was present due to chronic renal insufficiency. An episode of catheter-related bloodstream infection was documented by using Bact-Alert Blood Culture System and Differential-Time-to-Positivity Method for central venous catheter versus peripheral blood cultures (>120 min). Once removed, it was confirmed through Maki semi quantitative technique (>15 FCU). The microorganism was identified by API 20NE and Vitek 1 as Ochrobactrum anthropi.

Bacteriemia por Ochrobactrum anthropi en paciente con obstrucción de la vía biliar / Bacteraemia by Ochrobactrum anthropi in patient with biliary obstruction

Reporte de caso de bacteriemia por Ochrobactrum anthropi con probable hepatitis bacteriana asociada, en un paciente inmunocompetente, el cual ingresa por sospecha de colangitis y obstrucción biliar. O. anthropi es una bacteria emergente en infecciones intrahospitalarias con notable resistencia antimicrobiana, y es un patógeno inusual en humanos.

A case report of bacteraemia by Ochrobactrum anthropi probably associated with bacterial hepatitis, in a inmuno competent patient, who was admitted to the hospital with the diagnostic impression of cholangitis and biliary obstruction. O. anthropi is an emerging bacteria in nosocomial infections with remarkable antimicrobial resistance, being an unusual pathogen in humans.

A Case of Meropenem-Resistant Ochrobactrum anthropi Bacteremia

Ochrobactrum anthropi is an oxidase-producing, non-lactose-fermenting, gram-negative bacillus that is frequently isolated from the environment including sinks, baths, soil, and hospital water sources. Recently O. anthropi have been reported as an emerging opportunistic pathogen in immunocompromised patients, particularly in those with indwelling venous catheters. Most O. anthropi were highly resistant to beta-lactam antibiotics except carbapenem. We report a case of O. anthropi bacteremia with an unusual pattern of antibiotic resistance compared to previous reports. A 47-year-old woman undergoing camptobell/cisplatin chemotherapy via indwelling venous catheter (chemoport) for stage IV ovarian cancer, had septicemia due to O. anthropi of unknown origin. The isolates were resistant to all beta-lactams and meropenem and susceptible to aminoglycoside, ciprofloxacin, and trimethoprim-sulfamethoxazole. She recovered from sepsis with combination treatment with imipenem and ciprofloxacin for 3 weeks.

A Case of Meropenem-Resistant Ochrobactrum anthropi Bacteremia

Ochrobactrum anthropi is an oxidase-producing, non-lactose-fermenting, gram-negative bacillus that is frequently isolated from the environment including sinks, baths, soil, and hospital water sources. Recently O. anthropi have been reported as an emerging opportunistic pathogen in immunocompromised patients, particularly in those with indwelling venous catheters. Most O. anthropi were highly resistant to beta-lactam antibiotics except carbapenem. We report a case of O. anthropi bacteremia with an unusual pattern of antibiotic resistance compared to previous reports. A 47-year-old woman undergoing camptobell/cisplatin chemotherapy via indwelling venous catheter (chemoport) for stage IV ovarian cancer, had septicemia due to O. anthropi of unknown origin. The isolates were resistant to all beta-lactams and meropenem and susceptible to aminoglycoside, ciprofloxacin, and trimethoprim-sulfamethoxazole. She recovered from sepsis with combination treatment with imipenem and ciprofloxacin for 3 weeks.

Infective Endocarditis due to Ochrobactrum anthropi in a Hemodialysis Patient: A Case Report / 대한신장학회지

Ochrobactrum anthropi is an aerobic, gram-negative, motile, non-lactose-fermenting, oxidase-producing, and urease-positive bacillus. We reported a case of aortic valve endocarditis due to O. anthropi in a hemodialysis patient. To our knowledge, this is the first case of O. anthropi endocarditis in a hemodialysis patient in Korea. The organism was resistant to beta-lactam antibiotics and susceptible to ciprofloxacin, amikacin, trimethoprim-sulfamethoxazole, gentamicin and carbapenem. We treated O. anthropi endocarditis with meropenem for 6 weeks and the patient recovered completely.

Ochrobactrum anthropi septicaemia.

Ochrobactrum anthropi is an emerging opportunist pathogen in immunocompromised patients. We report a case of septicaemia due to O. anthropi in an elderly male patient with coronary artery disease with severe left ventricular dysfunction admitted in the Intensive coronary care unit. Following intraaortic balloon pump (IABP) insertion, the patient developed a haematoma at the local site, which led to septicaemia. In spite of intensive treatment, the condition of the patient continued to deteriorate and he died on the seventh day. This infection with the microbiological characteristics useful for identification of the organism is described.

A Case of Ochrobactrum anthropi Bacteremia / 병원감염관리

Ochrobactrum anthropi, a rarely encountered organism in humans, is usually associated with infections in immunocompromised hosts and patients with indwelling catheters. We report a case of bacteremia associated with O. anthropi in a 80-year-old male with intrahepatic duct carcinoma. After insertion of biliary stent with endoscopic retrograde cholangiopancreatography, fever and neutrophilic leukocytosis developed in the patient. Blood cultures were performed three times, and O. anthropi was isolated from an aerobic bottle. Although the patient did not receive effective antibiotic treatment, fever and neutrophilic leukocytosis were improved.

Spontaneous Bacterial Peritonitis due to Ochrobactrum anthropi: A Case Report

We report a case of spontaneous bacterial peritonitis from Ochrobactrum anthropi. O. anthropi is recognized as an emerging pathogen in immunocompromised patients. In contrast to most previously described cases, the patient reported here had no indwelling catheter. To our knowledge, no case of O. anthropi spontaneous bacterial peritonitis has been reported in the medical literature until now.

A Case of Ochrobactrum Anthropi Endophthalmitis after Cataract Surgery

PURPOSE: To report a case of Ochrobactrum anthropi endophthalmitis following cataract extraction and intraocular lens implantation. METHODS: A 57-year-old man was refered for evaluation and management of chronic uveitis on his left eye. He had undergone cataract surgery 1 year previously. His visual acuity of left eye was 20/100. The left eye had marked inflammation in anterior chamber and vitreous cavity. We performed pars plana vitrectomy with removal of the intraocular lens and intravitreal antibiotics injection (Amikacin 0.4 mg/0.1 ml). RESULTS: Microbiologic examination of the anterior chamber fluid, intraocular lens disclosed Ochrobactrum anthropi, a gram-negative bacillus. Twelve weeks after vitrectomy, his left corrected visual acuity was 20/25 and anterior segment showed no inflammatory cell.