Effects of topical azithromycin, moxifloxacin, and povidone iodine on conjunctival bacterial flora in patients undergoing intravitreal injection / Os efeitos da azitromicina tópica, moxifloxacina e iodopovidona na flora bacteriana conjuntival em injeções intravítreas

ABSTRACT Purpose: To compare effects of 5% topical povidone iodine with prophylactic topical azithromycin and moxifloxacin on bacterial flora in patients undergoing intravitreal injection. Methods: A total of 132 patients were randomly assigned to receive treatment with azithromycin or moxifloxacin, or no treatment (control group). In total, 528 specimens were obtained at the time of admission, 4 days before intravitreal injection, 4 days after intravitreal injection, and 8 days after intravitreal injection. Samples were immediately sent to the microbiology laboratory for incubation. Results: The microorganism observed most frequently was coagulasenegative Staphylococcus (23.8%). When the results of samples obtained on Day 4 before injection were assessed, growth of coagulase-negative Staphylococcus was significantly lower in the moxifloxacin group, compared with controls (p=0.049). Acinetobacter baumannii continued to grow after administration of azithromycin (p=0.033). When the results of four days after intravitreal injection were evaluated, growth of coagulase-ne gative Staphylococcus was higher in controls, compared with patients who received azithromycin or moxifloxacin (p=0.004). Eradication rate was significantly higher in the moxifloxacin group than in the control group (p=0.001). Samples obtained on Day 8 after intravitreal injection showed similar levels of bacterial growth in all groups (p=0.217). Conclusion: Moxifloxacin was more effective than 5% povidone iodine in controlling the growth of conjunctival bacterial flora. Use of moxifloxacin in combination with 5% povidone iodine resulted in a synergistic effect.

RESUMO Objetivo: Comparar os efeitos de iodopovidona tópico a 5% com azitromicina e moxifloxacina profiláticas sobre a flora bacteriana em pacientes submetidos à injeção intravítrea. Métodos: Um total de 132 pacientes foram aleatoriamente designados para receber tratamento com azitromicina ou moxifloxacina ou nenhum tratamento (grupo controle). No total, 528 amostras foram obtidas no momento na admissão, 4 dias antes da injeção intravítrea, 4 dias após a injeção intravítrea e 8 dias após a injeção intravítrea. As amostras foram imediatamente enviadas para o laboratório de microbiologia para incubação. Resultados: O microorganismo mais frequentemente observado foi o Staphylococcus coagulase-negativo (23,8%). Quando os resultados das amostras obtidas no dia 4 antes da injeção foram avaliados, o crescimento do Staphylococcus coagulase-negativo foi significativamente menor no grupo mo xifloxacina, em comparação com os controles (p=0,049). Acinetobacter baumannii continuou a crescer após a administração de azitromicina (p=0,033). Quando os resultados de 4 dias após a injeção intravítrea foram avaliados, o crescimento do Staphylococcus coagulase-negativo foi maior no controle, em comparação com pacientes que receberam azitromicina ou moxifloxacina (p=0,004). A taxa de erradicação também foi significativamente maior no grupo moxifloxacina do que no grupo controle (p=0,001). As amostras obtidas no dia 8 após injeção intravítrea mostraram níveis semelhantes de crescimento bacteriano em todos os grupos (p=0,217). Conclusão: A moxifloxacina foi mais eficaz do que 5% de iodopovidona no controle do crescimento da flora bacteriana conjuntival. O uso de moxifloxacina em combinação com 5% de iodopovidona resultou em um efeito sinérgico.

Indicaciones y perfil de seguridad de las fluoroquinolonas en el tratamiento de la tuberculosis en un hospital general de la Ciudad Autónoma de Buenos Aires / Indications and safety profile of fluoroquinolones in the treatment of tuberculosis in a general hospital of the Autonomous City of Buenos Aires

Introducción: Con frecuencia las fluoroquinolonas integran los esquemas de tratamiento de tuberculosis, tanto en aquellos con enfermedad multirresistente (parte esencial de la prescripción), como también en individuos con tuberculosis sensible e intolerancia a drogas de primera línea. Objetivos: Evaluar cuáles fueron las indicaciones para incluir fluoroquinolonas en el tratamiento antituberculosis y describir los eventos adversos relacionados con su utilización. Materiales y Métodos: Se realizó un análisis retrospectivo de pacientes que iniciaron tratamiento para tuberculosis entre el 1 de enero de 2014 y el 31 de diciembre de 2016. Definimos evento adverso como aquella condición que derivó en la suspensión de un medicamento o la necesidad de utilizar drogas específicas para su manejo. Se utilizó la prueba de c2 para las comparaciones entre grupos. Resultados: Entre los 267 pacientes que iniciaron tratamiento en el período descripto, recibieron fluoroquinolonas 24 individuos (11 hombres) representando el 9% del total; 19 se trataron con moxifloxacina 400 mg/día y el resto con levofloxacina 750 mg/día. Comparando los grupos con fluoroquinolonas vs. sin fluoroquinolonas, no hubo diferencias significativas en el porcentaje de participantes de sexo masculino (46 vs. 58%), edad (34.7 ± 12 vs. 35.1 ± 15 años), afectación pulmonar (58 vs. 68%) y proporción de abandonos (26 vs. 21%). Hubo una mayor proporción de argentinos en el grupo con fluoroquinolonas vs. sin fluoroquinolonas (71 vs. 44%, p = 0.012) y de individuos VIH positivos (46 vs. 8.6%, p < 0.05). Se indicaron fluoroquinolonas en reemplazo de rifampicina en 9 pacientes (37.5%) debido a la interacción de ésta con antirretrovirales, en 9 (37.5%) por intolerancia y en 5 (21%) por resistencia a anti TB de primera línea, en 1 por el antecedente de cirrosis (en lugar de pirazinamida). El tiempo de tratamiento con fluoroquinolonas fue de 203 ± 158 días (rango 30-660) sin observarse eventos adversos relacionados con su uso. Conclusión: En el grupo examinado el uso de fluoroquinolonas no se asoció a eventos adversos, siendo las indicaciones más frecuentes en estos pacientes las interacciones medicamentosas en pacientes VIH positivos y la intolerancia a las drogas de primera línea.

Introduction: The floroquinolones are frequently used in the treatment regimes for tuberculosis (TB) in both those with multidrug-resistant TB (MDR-TB), where it forms an essential part of the regimen, as well as intolerance to first-line drugs in the TB sensitive. Objectives: To evaluate the indications to include floroquinolones in TB treatment and to describe the adverse events associated with its use. Materials and Methods: A retrospective analysis of the patients who began treatment for TB between 1 January 2014 and 31 December 2016 was performed. We define adverse event as that condition that results in the suspension of a medicine or the need to use specific drugs for its management. Group characteristics were comparing by using c2 test. Results: Among the 267 patients who began treatment in the period described, 24 (11 men) received fluoroquinolones representing 9% of the total: 19 moxifloxacin 400 mg/day and the rest levofloxacin 750 mg/day. Comparing the groups with fluoroquinolones vs. without fluoroquinolones, there were no significant differences in the percentage of men (46 vs. 58%), age (34.7 ± 12 vs. 35.1 ± 15 years), pulmonary involvement (58 vs. 68%), and proportion of dropouts (26 vs. 21%). There was a higher proportion of Argentines in the group with fluoroquinolones vs. without fluoroquinolones (71 vs. 44%, p = 0,012) and HIV-positive (46 vs. 8.6%, p < 0.05). Fluoroquinolones were indicated in replacement of rifampicin in 9 patients (37.5%) due to the interaction with antiretroviral drugs, in 9 (37.5%) by intolerance and in 5 (21%) for resistance to first-line anti-TB drugs, in 1 by the history of cirrhosis (instead of pyrazinamide). The time of treatment with fluoroquinolones was 203 ± 158 days (range 30-660) with no observed adverse events related to its use. Conclusion: The use of fluoroquinolones was not associated with adverse events in the group of patients studied, drug interactions in HIV positive patients and the intolerance to first-line drugs were the most frequent indications in the studied group.

La moxifloxacina como coadyuvante en el tratamiento de las periodontitis / Moxifloxacine an adjunct in the treatment of periodontitis

La enfermedad periodontal es causada por complejos bacterianos subgingivales organizados en una biopelícula, que genera beneficios ecológicos y metabólicos a los microorganismos que residen en ella. Por otro lado, la biopelícula también genera ventajas contra los mecanismos de defensa del huésped representados en antimicrobianos naturales o contra los antibióticos sintéticos. Pacientes de Centroamérica y Sudamérica tienen perfiles microbiológicos similares en periodontitis agresivas como crónicas. En ambas entidades, los periodontopatógenos más frecuentes asociados con la enfermedad periodontal en los pacientes latinoamericanos son Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Prevotella nigrescens, Tannerella forsythia, Eikenella corrodens y bacilos entéricos gramnegativos. Los antibióticos han sido prescritos como apoyo a la terapia mecánica para reducir la carga bacteriana a nivel subgingival. Sin embargo, algunas especies bacterianas han desarrollado resistencia antimicrobiana debido a la prescripción indiscriminada de antibióticos, en especial en Latinoamérica. Las quinolonas representan una nueva alternativa en la terapia periodontal debido a su actividad contra los periodontopatógenos y los bacilos entéricos gramnegativos puesto que tienen una reducida resistencia bacteriana, y tienen alta difusión tisular y buena absorción. Se realizó una revisión de literatura con el propósito de brindar una actualización en el uso de antimicrobianos como terapia coayudante en el tratamiento de la periodontitis, enfocando el potencial terapéutico de la moxifloxacina como nueva alternativa.

Periodontal disease results from infection by specific subgingival bacterial complexes organized in a biofilm. Biofilm protects bacteria and other microbial pathogens from host immune system defenses and from natural and artificial antibiotics. Patients with aggressive and chronic periodontitis from Central and South American countries have similar microbiological profiles. In both entities, the most frequent periodontopathogens associated with periodontal disease in Latin American patients are Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Prevotella nigrescens, Tannerella forsythia, Eikenella corrodens and gram negative enteric rods. Supplemental antibiotics to the mechanical periodontal treatment are prescribed to reduce periodontopathic bacteria in the subgingival environment. Nonetheless, some bacterial species have developed antibiotic resistance due to their indiscriminate prescription in Latin America. Quinolones represent a new alternative in periodontal therapy, due to their activity against periodontopathogens and gram negative enteric rods, to reduced bacterial resistance, high tissue penetration, and good absorption. The aim of this review is to present an update on the use of antimicrobials as adjunctive therapy in the treatment of periodontitis, focusing on the potential therapeutic use of moxifloxacin.

Actividad antibacteriana y clínica de la moxifloxacina comparada con otros antibióticos para el manejo de infecciones bucales / Clinical antibacterial activity and moxifloxacin compared with other antibiotics for oral infections handling

La cavidad bucal constituye uno de los principales nichos ecológicos para bacterias aerobias y principalmente anaerobias. Estos microorganismos juegan un papel importante en la patogénesis de las infecciones bucales y en las infecciones focales de origen oral. Las infecciones bucales más frecuentes incluyen caries, periodontitis, absceso periapical, absceso periodontal, pericoronitis, pulpitis, osteítis e infección de los espacios aponeuróticos. Algunos estudios indican un aumento en la prevalencia de microorganismos presentes en la cavidad bucal que son resistentes a algunos de los antibióticos usualmente empleados para combatir este tipo de infecciones, por lo cual es necesario tener presente antibióticos alternativos para uso terapéutico o profiláctico. Moxifloxacina (MXF) es una 8-methoxiquinolona de amplio espectro, eficaz contra patógenos respiratorios intracelulares típicos y atípicos, bacterias gram negativas y muchas bacterias anaeróbicas obligadas. MXF es también muy activo contra cepas que son resistentes a la penicilina, macrólidos, tetraciclinas, thrimethoprim/sulfa y algunas fluroquinolonas. Cuando se compara con la amoxicilina/clavulánico (AMX-CLA), el esquema de dosificación de la MXF (400 mg/diarios), podría garantizar un mayor cumplimiento con las prescripciones. Además, su mecanismo de acción también puede proporcionar un alivio más rápido de los síntomas de la infección odontogénica, convirtiéndose en una posible alternativa antimicrobiana contra anaerobios obligados residentes en la cavidad bucal

The oral cavity constitutes one of the principal ecological niches for obligate anaerobic bacteria. These microorganisms play an important role in the pathogenesis of oral infections and focal infections of oral origin. Most of these infections are odontogenics, being the most frequent decays, periodontitis, periapical abscess, periodontal abscess, pericoronitis, pulpitis, osteitis and infection of the aponeurotic spaces. Some published studies highlight the growing prevalence of obligate anaerobes in oral origin that are resistant to some of these antibiotics, giving rise to the need to investigate alternative antibiotics for therapeutic or prophylactic use. Moxifloxacin (MXF) is an 8-methoxyquinolone with a broad spectrum of activity, including activity against typical, atypical and intracellular respiratory pathogens, gram negative pathogens and many obligate anaerobic bacteria. MXF is also highly active against strains that are resistant to penicillin, macrolides, tetracyclines, trimethoprim/sulfamethoxazole and some fluoroquinolones. The dosing schedule of the MXF (400 mg / day) could ensure greater compliance with the requirements and its mechanism of action may also provide a faster relief of symptoms of infection odontogenic, when compared with amoxicillin / clavulanate (AMX-CLA). In addition, may represent a possible alternative antimicrobial against oral anaerobes