Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 465
Filtrar
Mais filtros

Tipo de documento
Intervalo de ano de publicação
1.
Am Fam Physician ; 110(2): 134-144, 2024 08.
Artigo em Inglês | MEDLINE | ID: mdl-39172671

RESUMO

Conjunctivitis caused by viruses, bacteria, or allergies is one of the most common eye conditions in primary care. There is no single sign or symptom that accurately differentiates viral from bacterial conjunctivitis. A comprehensive history and physical examination can guide diagnosis. Viral and allergic conjunctivitis are more common in adults and typically present with watery discharge. Supportive care options for viral conjunctivitis include artificial tears, cold compresses, and antihistamine eye drops. Strict personal hygiene, including frequent handwashing, is essential to decrease the risk of transmission. Topical antihistamines with mast cell-stabilizing activity are the treatment of choice for allergic conjunctivitis. Bacterial conjunctivitis is more common in children and typically presents as mucopurulent discharge with the eyelids matted shut. Delayed antibiotic prescribing has been found to have similar symptom control as immediate prescribing. Ophthalmology referral is indicated for conjunctivitis in a neonate or patients with severe pain, decreased vision, recent ocular surgery, vesicular rash on the eyelids or nose, history of rheumatologic disease, or immunocompromised state.


Assuntos
Conjuntivite , Humanos , Conjuntivite/diagnóstico , Conjuntivite/terapia , Diagnóstico Diferencial , Conjuntivite Bacteriana/diagnóstico , Conjuntivite Bacteriana/terapia , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Viral/diagnóstico , Conjuntivite Viral/terapia , Conjuntivite Viral/tratamento farmacológico , Antibacterianos/uso terapêutico , Conjuntivite Alérgica/diagnóstico , Conjuntivite Alérgica/terapia
2.
Int J Mol Sci ; 25(17)2024 Aug 25.
Artigo em Inglês | MEDLINE | ID: mdl-39273175

RESUMO

A novel ophthalmic delivery system utilizing levofloxacin-loaded, preservative-free, nanofiber-based inserts was investigated. Polyvinyl alcohol (PVA) and Poloxamer 407 (Polox)were employed as matrix materials, while hydroxypropyl-beta-cyclodextrin (HP-ß-CD) was a solubilizer. The formulations were prepared via electrospinning and characterized for fiber morphology, drug dissolution, cytotoxicity, and antimicrobial activity. Scanning electron microscopy confirmed uniform fibrous structures. Fourier Transform Infrared spectroscopy and X-ray diffraction analyses demonstrated the amorphous state of levofloxacin within the fibers. In vitro dissolution studies revealed a rapid (within 2 min) and complete drug release, with higher HP-ß-CD levels slightly delaying the release. Cytotoxicity tests showed increased HP-ß-CD concentrations induced irritation, that was mitigated by sodium hyaluronate. The antimicrobial efficacy of the nanofibers was comparable to conventional eye drops, with lower minimum inhibitory concentrations for most tested strains. The nanofibrous formulation prepared from a PVA-Polox-based viscous solution of the drug:CD 1:1 mol ratio, containing 0.4% (w/w) sodium hyaluronate) was identified as a particularly promising alternative formulation due to its rapid and complete dissolution, good biocompatibility, and effective antimicrobial properties. Its gelling properties indicate that the residence time on the eye surface can be increased, potentially reducing discomfort and enhancing therapeutic outcomes. The nanofibrous formulations enhanced antimicrobial efficacy, providing a preservative-free alternative that minimizes the potential eye irritation that might occur because of the preservative agent and reduces the administrated dose frequency by extending the drug's retention time on the eye's surface. Subsequently, it improves patients' adherence, which would reflect positively on the bioavailability. The levofloxacin-HP-ß-CD nanofibers demonstrate promise as an alternative to traditional eye drops, offering advantages in solubility, stability, and patient compliance for ocular infection treatment.


Assuntos
Antibacterianos , Conjuntivite Bacteriana , Levofloxacino , Nanofibras , Nanofibras/química , Levofloxacino/química , Levofloxacino/farmacologia , Levofloxacino/administração & dosagem , Conjuntivite Bacteriana/tratamento farmacológico , Antibacterianos/farmacologia , Antibacterianos/química , Antibacterianos/administração & dosagem , Álcool de Polivinil/química , Soluções Oftálmicas/química , Soluções Oftálmicas/farmacologia , 2-Hidroxipropil-beta-Ciclodextrina/química , Humanos , Animais , Testes de Sensibilidade Microbiana , Administração Oftálmica , Espectroscopia de Infravermelho com Transformada de Fourier , Liberação Controlada de Fármacos , Composição de Medicamentos/métodos , Sistemas de Liberação de Medicamentos/métodos , Poloxâmero/química
3.
AAPS PharmSciTech ; 25(4): 77, 2024 Apr 08.
Artigo em Inglês | MEDLINE | ID: mdl-38589761

RESUMO

Keratin has the potential to function as the gel matrix in an ophthalmic formulation for the encapsulation of the macrolide antibiotic azithromycin. The quality of this formulation was thoroughly evaluated through various analyses, such as in vitro release assessment, rheological examination, intraocular retention studies in rabbits, assessment of bacteriostatic efficacy, and safety evaluations. It is worth mentioning that the gel demonstrated shear thinning properties and exhibited characteristics of an elastic solid, thereby confirming its structural stability. The gel demonstrated a notable affinity for mucosal surfaces in comparison to traditional azithromycin aqueous solutions. In vitro release testing revealed that drug release transpired via diffusion mechanisms, following a first-order kinetic release pattern. Additionally, the formulated gel exhibited remarkable antibacterial efficacy against Staphylococcus aureus and Pseudomonas aeruginosa in bacteriostatic evaluations. Lastly, safety assessments confirmed that the gel eye drops induced minimal irritation and displayed no apparent cytotoxicity, indicating their good safety and biocompatibility for ocular application. Thus, these findings indicated that the prepared azithromycin gel eye drops complied with the requisite standards for ophthalmic preparations.


Assuntos
Conjuntivite Bacteriana , Sistemas de Liberação de Medicamentos , Animais , Coelhos , Azitromicina/farmacologia , Queratinas/uso terapêutico , Conjuntivite Bacteriana/tratamento farmacológico , Antibacterianos/farmacologia , Antibacterianos/uso terapêutico , Géis/química , Soluções Oftálmicas/química
4.
Klin Monbl Augenheilkd ; 241(2): 231-246, 2024 Feb.
Artigo em Alemão | MEDLINE | ID: mdl-37977204

RESUMO

Bacterial conjunctivitis is a leading cause of infectious conjunctivitis in children and second most common cause in adults. Although often self-limiting, it can lead to complications like corneal scarring and systemic infections in high-risk groups including newborns and immunocompromised patients. Thus, prompt diagnosis and treatment are essential for these vulnerable populations. Common bacterial causes are Staphylococcus aureus and Streptococcus pneumoniae in adults and Haemophilus influenzae and Moraxella catarrhalis in children. Clinical features alone do not reliably identify the causative pathogen. Microbiological testing is necessary for persistent or severe cases. Topical antibiotics like azithromycin or fluorochinolones are usually prescribed. However, gonococcal and chlamydial conjunctivitis warrant systemic antibiotics due to their potential for severe complications. Increasing antibiotic resistance might even necessitate tailored therapy based on antibiotic susceptibility profiles. Screening and treating pregnant women is an effective prevention strategy by reducing perinatal transmission (especially of gonococcal and chlamydial infections). In summary, while often self-limiting, potential complications and rising antibiotic resistance underscore the importance of timely diagnosis and treatment of bacterial conjunctivitis. Preventive measures including maternal screening are crucial public health initiatives to curb the risks associated with this common eye infection.


Assuntos
Conjuntivite Bacteriana , Conjuntivite , Recém-Nascido , Criança , Adulto , Humanos , Feminino , Gravidez , Transmissão Vertical de Doenças Infecciosas , Antibacterianos/uso terapêutico , Conjuntivite Bacteriana/diagnóstico , Conjuntivite Bacteriana/tratamento farmacológico , Azitromicina/uso terapêutico
5.
Cochrane Database Syst Rev ; 3: CD001211, 2023 03 13.
Artigo em Inglês | MEDLINE | ID: mdl-36912752

RESUMO

BACKGROUND: Acute bacterial conjunctivitis is an infection of the conjunctiva and is one of the most common ocular disorders in primary care. Antibiotics are generally prescribed on the basis that they may speed recovery, reduce persistence, and prevent keratitis. However, many cases of acute bacterial conjunctivitis are self-limited, resolving without antibiotic therapy. This Cochrane Review was first published in The Cochrane Library in 1999, then updated in 2006, 2012, and 2022. OBJECTIVES: To assess the benefits and side effects of antibiotic therapy in the management of acute bacterial conjunctivitis. SEARCH METHODS: We searched CENTRAL (which contains the Cochrane Eyes and Vision Group Trials Register) (The Cochrane Library 2022, Issue 5), MEDLINE (January 1950 to May 2022), Embase (January 1980 to May 2022), the metaRegister of Controlled Trials (mRCT) (www.controlled-trials.com), ClinicalTrials.gov (www. CLINICALTRIALS: gov), and the WHO International Clinical Trials Registry Platform (ICTRP) (www.who.int/ictrp/search/en). We did not use any date or language restrictions in the electronic searches for trials. We last searched the electronic databases in May 2022.   SELECTION CRITERIA: We included randomized controlled trials (RCTs) in which any form of antibiotic treatment, with or without steroid, had been compared with placebo/vehicle in the management of acute bacterial conjunctivitis. This included topical and systemic antibiotic treatments. DATA COLLECTION AND ANALYSIS: Two authors independently reviewed the titles and abstracts of identified studies. We assessed the full text of all potentially relevant studies and determined the included RCTs, which were further assessed for risk of bias using Cochrane methodology. We performed data extraction in a standardized manner and conducted random-effects meta-analyses using RevMan Web. MAIN RESULTS: We included 21 eligible RCTs, 10 of which were newly identified in this update. A total of 8805 participants were randomized. All treatments were topical in the form of drops or ointment. The trials were heterogeneous in terms of their eligibility criteria, the nature of the intervention (antibiotic drug class, which included fluoroquinolones [FQs] and non-FQs; dosage frequency; duration of treatment), the outcomes assessed and the time points of assessment. We judged one trial to be of high risk of bias, four as low risk of bias, and the others as raising some concerns. Based on intention-to-treat (ITT) population, antibiotics likely improved clinical cure (resolution of clinical symptoms or signs) by 26% (RR 1.26, 95% CI 1.09 to 1.46; 5 trials, 1474 participants; moderate certainty) as compared with placebo. Subgroup analysis showed no differences by antibiotic class (P = 0.67) or treatment duration (P = 0.60). In the placebo group, 55.5% (408/735) of participants had spontaneous clinical resolution by days 4 to 9 versus 68.2% (504/739) of participants treated with an antibiotic. Based on modified ITT population, in which participants were analyzed after randomization on the basis of positive microbiological culture, antibiotics likely increased microbiological cure (RR 1.53, 95% CI 1.34 to 1.74; 10 trials, 2827 participants) compared with placebo at the end of therapy; there were no subgroup differences by drug class (P = 0.60). No study evaluated the cost-effectiveness of antibiotic treatment. Patients receiving antibiotics had a lower risk of treatment incompletion than those in the placebo group (RR 0.64, 95% CI 0.52 to 0.78; 13 trials, 5573 participants; moderate certainty) and were 27% less likely to have persistent clinical infection (RR 0.73, 95% CI 0.65 to 0.81; 19 trials, 5280 participants; moderate certainty). There was no evidence of serious systemic side effects reported in either the antibiotic or placebo group (very low certainty). When compared with placebo, FQs (RR 0.70, 95% CI 0.54 to 0.90) but not non-FQs (RR 4.05, 95% CI 1.36 to 12.00) may result in fewer participants with ocular side effects. However, the estimated effects were of very low certainty. AUTHORS' CONCLUSIONS: The findings of this update suggest that the use of topical antibiotics is associated with a modestly improved chance of resolution in comparison to the use of placebo. Since no evidence of serious side effects was reported, use of antibiotics may therefore be considered to achieve better clinical and microbiologic efficacy than placebo. Increasing the proportion of participants with clinical cure or increasing the speed of recovery or both are important for individual return to work or school, allowing people to regain quality of life. Future studies may examine antiseptic treatments with topical antibiotics for reasons of cost and growing antibiotic resistance.


Assuntos
Antibacterianos , Conjuntivite Bacteriana , Humanos , Antibacterianos/efeitos adversos , Conjuntivite Bacteriana/tratamento farmacológico , Ensaios Clínicos Controlados Aleatórios como Assunto
6.
Chemotherapy ; 68(4): 228-232, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37231886

RESUMO

Neisseria meningitidis represents an uncommon pathogen of acute bacterial conjunctivitis. In this brief report, we describe a case of meningococcal conjunctivitis in an immunocompetent adult male, with a review of the literature. The patient went to the outpatient ophthalmology clinic complaining of severe ocular discomfort, burning, and redness for more than 2 weeks and, at slit lamp examination, he was diagnosed with a mild conjunctivitis. Microbiology cultures of ocular swabs revealed the growth of colonies, as pure culture, identified as N. meningitidis of serogroup B. A diagnosis of primary meningococcal conjunctivitis was made and treatment of patient with intramuscular injections of ceftriaxone in addition to topical moxifloxacin eye drops for 2 weeks led to clinical improvement and, finally, to a complete recovery, in accordance with microbiological findings. Ophthalmologists must be aware of the possibility of primary meningococcal conjunctivitis cases, even uncommon, and the need to treat with systemic antibiotics and their close contacts with adequate antibiotic chemoprophylaxis.


Assuntos
Conjuntivite Bacteriana , Conjuntivite , Infecções Meningocócicas , Neisseria meningitidis , Adulto , Masculino , Humanos , Pessoa de Meia-Idade , Infecções Meningocócicas/diagnóstico , Infecções Meningocócicas/tratamento farmacológico , Infecções Meningocócicas/microbiologia , Conjuntivite Bacteriana/diagnóstico , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Bacteriana/microbiologia , Antibacterianos/uso terapêutico , Conjuntivite/diagnóstico , Conjuntivite/tratamento farmacológico , Conjuntivite/microbiologia
7.
Eye Contact Lens ; 49(1): 35-41, 2023 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-36544283

RESUMO

PURPOSE: To determine the safety and efficacy of black tea extract in the treatment of bacterial conjunctivitis in a rabbit model and compare it with that of gatifloxacin drops. METHODS: Black tea extract was tested in vitro on bacterial cultures of methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa. Forty-two rabbit eyes were cultured with either MRSA (n=21) or P. aeruginosa (n=21) and further divided into a control group (n=5), a tea group (n=8) treated with black tea extract, and a gatifloxacin group (n=8) treated with 0.3% gatifloxacin eye drops. Conjunctival swabs were collected on the third and fifth days. RESULTS: The tea extract successfully inhibited the growth of both organisms at a concentration of 400 mg/mL. Rabbits in the treatment groups showed a reduction in the clinical index on day 2 (P<0.01), unlike the control group (P=0.1), for both organisms. Resolution of conjunctivitis was achieved on days 4 and 5 in the tea and gatifloxacin groups, respectively. On days 3 and 5, while the control group still showed considerable bacterial growth, the tea and gatifloxacin groups showed its inhibition. CONCLUSION: Tea extract has antimicrobial effects similar to those of gatifloxacin in a rabbit model of conjunctivitis.


Assuntos
Conjuntivite Bacteriana , Conjuntivite , Staphylococcus aureus Resistente à Meticilina , Animais , Coelhos , Gatifloxacina/farmacologia , Gatifloxacina/uso terapêutico , Fluoroquinolonas/uso terapêutico , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite/tratamento farmacológico , Chá , Antibacterianos/uso terapêutico , Antibacterianos/farmacologia
8.
BMC Ophthalmol ; 20(1): 144, 2020 Apr 15.
Artigo em Inglês | MEDLINE | ID: mdl-32293359

RESUMO

BACKGROUND: Trachoma is a contagious infection of the eye. World Health Organization recommended three rounds of mass drug administration in districts where the prevalence of trachomatous follicular (TF) is ≥10% in children aged 1-9 years. Mass drug distribution was given to residents for three consecutive years with more than 90% coverage. However, the prevalence and associated factors of active trachoma in the study community after the intervention was not yet determined. Thus, this deals with the prevalence and associated factors of active trachoma among children aged 1-9 years. METHODS: We conducted a Community based cross-sectional study among 502 children aged 1-9 in March 2018 in Deguatemben. A multi-stage sampling technique was applied. Selected children were examined for trachoma using 2.5x binocular loupe and graded based on the WHO simplified grading system. Mothers were interviewed for factors associated with trachoma using a structured questionnaire. Data was entered on Epi-Info and exported to SPSS for analysis. Both descriptive and inferential analyses were done with 95% confidence intervals (CIs) at a p-value < 0.05 for the final model. RESULTS: The prevalence of active trachoma was found 21.5% (95% CI: 17.8-25.1%). Being 1 to 4 years old [AOR (95% CI) = 6.81(2.00-23.11)], not washing face [AOR (95% CI) =9.31(1.13-77.66)], not using soap [AOR (95% CI) =5.84(1.87-18.21)], unclean face [AOR(95% CI) = 18.22(4.93-69.32)] and mother's knowledge [AOR (95% CI) =0.06(0.02-0.19)] were found as independent predictors. CONCLUSION: The prevalence declined from the baseline, but it is still a public health problem in the district. Personal-related factors were found to be associated with the disease. Health education of "Facial cleanness" and related factors is recommended to increase knowledge of the mothers on their children's care in addition to the provision of antibiotics.


Assuntos
Antibacterianos/uso terapêutico , Azitromicina/uso terapêutico , Conjuntivite Bacteriana/epidemiologia , Infecções Oculares Bacterianas/epidemiologia , Tracoma/epidemiologia , Criança , Pré-Escolar , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Bacteriana/microbiologia , Estudos Transversais , Etiópia/epidemiologia , Infecções Oculares Bacterianas/tratamento farmacológico , Infecções Oculares Bacterianas/microbiologia , Feminino , Humanos , Lactente , Masculino , Prevalência , Fatores de Risco , População Rural , Inquéritos e Questionários , Tracoma/tratamento farmacológico , Tracoma/microbiologia
9.
Eye Contact Lens ; 45(3): e11-e14, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-30489345

RESUMO

This study is a retrospectively recruited case series. We report three infants with acute conjunctivitis induced by ß-lactamase-positive, ampicillin/clavulanic acid-resistant strains of Haemophilus influenzae (BLPACR). Patients with BLPACR-positive cultures were recruited from among 5,107 patients with inflammatory diseases of the ocular surface who underwent examinations, including bacterial culturing of conjunctival sac or corneal scrapings, between 2000 and 2015. Three BLPACR-positive patients were recruited, including a 10-month-old boy, a 4-month-old girl, and a 7-month-old girl. All three demonstrated BLPACR conjunctivitis. The clinical findings in these patients included fever, mucopurulent discharge, lid swelling, and conjunctival hyperemia. Samples of conjunctival swabs were obtained from all three infants, and BLPACR was isolated from all these conjunctival swabs. Antimicrobial susceptibility testing showed sensitivity to levofloxacin and resistance to ampicillin, cefaclor, and clarithromycin. We conclude that in infantile BLPACR conjunctivitis, simultaneous investigation for the determination of causative organism and antibiotic susceptibility testing are crucial aspects of the medical treatment.


Assuntos
Combinação Amoxicilina e Clavulanato de Potássio/farmacologia , Antibacterianos/farmacologia , Conjuntivite Bacteriana/microbiologia , Farmacorresistência Bacteriana Múltipla , Infecções por Haemophilus/microbiologia , Haemophilus influenzae/isolamento & purificação , beta-Lactamases/metabolismo , Doença Aguda , Conjuntivite Bacteriana/diagnóstico , Conjuntivite Bacteriana/tratamento farmacológico , Feminino , Infecções por Haemophilus/diagnóstico , Infecções por Haemophilus/tratamento farmacológico , Haemophilus influenzae/efeitos dos fármacos , Haemophilus influenzae/enzimologia , Humanos , Lactente , Levofloxacino/uso terapêutico , Masculino , Testes de Sensibilidade Microbiana , Estudos Retrospectivos , Inibidores da Topoisomerase II/uso terapêutico
10.
Ophthalmic Plast Reconstr Surg ; 35(5): e114-e115, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-31365511

RESUMO

Over a 2-year period, a 68-year-old woman suffered multiple recurrences of left giant fornix syndrome during the repeated tailing of intensive topical steroids and antibiotics; she had also undergone surgery to reduce the left upper fornix. After a further recurrence during tailing of topical therapy for bilateral disease, treatment with 4 times daily preservative-free povidone-iodine 5% eyedrops was started-with a marked improvement of symptoms and signs within a week. The patient is maintained, symptom-free, on once-daily povidone-iodine drops and dexamethasone 0.1% drops. The dramatic improvement on topical povidone-iodine therapy might suggest that, as an initial therapy, this might be more effective than the previously-recommended regime of hourly potent topical steroids and antibiotics.


Assuntos
Anti-Infecciosos Locais/administração & dosagem , Conjuntivite Bacteriana/tratamento farmacológico , Povidona-Iodo/administração & dosagem , Infecções Estafilocócicas/tratamento farmacológico , Idoso , Feminino , Humanos , Soluções Oftálmicas/administração & dosagem , Resultado do Tratamento
11.
Vet Ophthalmol ; 22(3): 246-255, 2019 May.
Artigo em Inglês | MEDLINE | ID: mdl-29953719

RESUMO

PURPOSE: To describe the aerobic conjunctival bacterial flora of 3 especies of free-living and under human care sea turtles and determine its antimicrobial susceptibility in vitro. METHOD: Thirty-six sea turtles (72 eyes), juveniles and adults, 7 free-living Chelonia mydas and 8 Chelonia mydas, 4 Caretta caretta, 11 Eretmochelys imbricata, and 6 Lepidochelys olivacea under human care, were evaluated. Conjunctival cultures were collected for identification of aerobic bacteria and antimicrobial susceptibility testing for ciprofloxacin, chloramphenicol, gentamicin, neomycin, oxacillin, polymyxin B, tetracycline, and tobramycin using antibiotic disks. Bacterial strains showing no sensitivity to 4 or more antimicrobials were considered multiresistant to this panel. RESULTS: Bacterial growth was observed in 12/14 (85.71%) samples in the free-living sea turtles, and there was growth in 100% (58/58) of the samples from captive animals. There were 94 strains isolated and 15 species identified. There was a predominance of Gram-positive bacteria in free-living Chelonia mydas, most of which were Bacillus and Staphylococcus. The most commonly isolated Gram-negative species were enterobacteria for free-living and under human care animals. The strains were predominantly sensitive to ciprofloxacin and tobramycin, and less sensitive to oxacillin or polymyxin B. Ten multiresistant strains were isolated. Yeast were identified in 13.89% (10/72) of the samples. CONCLUSIONS: These results, showing differences in the conjunctival bacterial flora of free-living and captive animals, may be helpful for diagnosis and treatment of ocular disorders in sea turtles.


Assuntos
Antibacterianos/farmacologia , Conjuntivite Bacteriana/veterinária , Bactérias Gram-Negativas/efeitos dos fármacos , Infecções por Bactérias Gram-Negativas/veterinária , Bactérias Gram-Positivas/efeitos dos fármacos , Infecções por Bactérias Gram-Positivas/veterinária , Tartarugas , Animais , Animais Selvagens , Animais de Zoológico , Antibacterianos/uso terapêutico , Brasil , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Bacteriana/microbiologia , Bactérias Gram-Negativas/isolamento & purificação , Infecções por Bactérias Gram-Negativas/tratamento farmacológico , Infecções por Bactérias Gram-Negativas/microbiologia , Bactérias Gram-Positivas/isolamento & purificação , Infecções por Bactérias Gram-Positivas/tratamento farmacológico , Infecções por Bactérias Gram-Positivas/microbiologia , Testes de Sensibilidade Microbiana/veterinária
12.
AAPS PharmSciTech ; 20(7): 272, 2019 Aug 01.
Artigo em Inglês | MEDLINE | ID: mdl-31372767

RESUMO

Bacterial conjunctivitis is a leading cause of ocular infections requiring short-term therapeutic treatment with frequent administration of drugs on daily basis. Topical dosage forms available in the market for the treatment of bacterial conjunctivitis such as simple drug solutions and suspensions are rapidly eliminated from the precorneal space upon instillation due to tear turn over and nasolacrimal drainage, limiting intraocular bioavailability of drug to less than 10% of the administered dose. To overcome issues related to conventional drop, an effort was made to design and evaluate prolong release ophthalmic solution of levofloxacin hemihydrate (LFH) using ion-sensitive in situ gelling polymer. Gellan gum was used as the in situ gelling agent. Formulations were screened based on in vitro gelation time, in vitro drug release, and stability towards sol to gel conversion upon storage. The prototype formulations exhibiting quick in vitro gelling time (< 15 s), prolonged in vitro drug release (18-24 h), and stability for at least 6 months at 25°C/40% relative humidity (RH) and 40°C/25% RH were evaluated for pharmacokinetic studies using healthy New Zealand white rabbits. Tested formulations were found to be well-tolerated and showed significant increase in AUC0-24 (22,660.39 h ng/mL) and mean residence time (MRT 12 h) as compared with commercially available solution Levotop PF® (Ajanta Pharma Ltd., India)(AUC0-24 6414.63 h ng/mL and MRT 4 h). Thus, solution formulations containing in situ gelling polymer may serve as improved drug delivery system providing superior therapeutic efficacy and better patient compliance for the treatment of bacterial conjunctivitis.


Assuntos
Antibacterianos/síntese química , Sistemas de Liberação de Medicamentos/métodos , Levofloxacino/síntese química , Soluções Oftálmicas/síntese química , Polissacarídeos Bacterianos/síntese química , Animais , Antibacterianos/administração & dosagem , Antibacterianos/farmacocinética , Disponibilidade Biológica , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Bacteriana/metabolismo , Composição de Medicamentos , Avaliação Pré-Clínica de Medicamentos/métodos , Liberação Controlada de Fármacos/fisiologia , Levofloxacino/administração & dosagem , Levofloxacino/farmacocinética , Soluções Oftálmicas/administração & dosagem , Soluções Oftálmicas/farmacocinética , Polissacarídeos Bacterianos/administração & dosagem , Polissacarídeos Bacterianos/farmacocinética , Coelhos
16.
Pak J Pharm Sci ; 31(4(Special)): 1757-1760, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-30203775

RESUMO

Acute bacterial conjunctivitis is an acute conjunctivitis that is frequently transmitted in summer and autumn. It is a common and frequently occurring disease in ophthalmology clinic. Gatifloxacin is an effective antibacterial drug. It not only maintains the antibacterial effect of the three generation of fluoroquinolones on Gram-negative bacteria, but also enhances the effectiveness of gatifloxacin, including other Gram-positive bacteria and anaerobes. In this paper, by taking gatifloxacin eye drops as the experimental drug and levofloxacin as the control drug, we conducted a double-blind randomized controlled clinical trial to evaluate the efficacy and safety of gatifloxacin eye drops in the treatment of acute bacterial conjunctivitis. The clinical results showed that the total effective rate of the Gatifloxacin treatment group was 95%. Conclusion shows that gatifloxacin is a safe and effective antibiotic eye drops. It has broad antibacterial spectrum, strong antibacterial activity and effective clinical treatment, and it can effectively treat acute bacterial conjunctivitis.


Assuntos
Conjuntivite Bacteriana/tratamento farmacológico , Gatifloxacina/uso terapêutico , Levofloxacino/uso terapêutico , Adolescente , Adulto , Idoso , Método Duplo-Cego , Feminino , Gatifloxacina/administração & dosagem , Gatifloxacina/efeitos adversos , Humanos , Levofloxacino/administração & dosagem , Levofloxacino/efeitos adversos , Masculino , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Soluções Oftálmicas/uso terapêutico , Adulto Jovem
17.
Ophthalmology ; 124(8): 1099-1107, 2017 08.
Artigo em Inglês | MEDLINE | ID: mdl-28624168

RESUMO

PURPOSE: Antibiotics are seldom necessary to treat acute conjunctivitis. We assessed how frequently patients with newly diagnosed acute conjunctivitis fill prescriptions for topical antibiotics and factors associated with antibiotic prescription fills. DESIGN: Retrospective, observational cohort study. PARTICIPANTS: A total of 340 372 enrollees in a large nationwide United States managed care network with newly diagnosed acute conjunctivitis, from 2001 through 2014. METHODS: We identified all enrollees newly diagnosed with acute conjunctivitis, calculating the proportion filling 1 or more topical antibiotic prescription within 14 days of initial diagnosis. Multivariate logistic regression assessed sociodemographic, medical, and other factors associated with antibiotic prescription fills for acute conjunctivitis. Geographic variation in prescription fills also was studied. MAIN OUTCOME MEASURES: Odds ratios (ORs) with 95% confidence intervals (CIs) for filling an antibiotic prescription for acute conjunctivitis. RESULTS: Among 340 372 enrollees with acute conjunctivitis, 198 462 (58%) filled ≥1 topical antibiotic prescriptions; 38 774 filled prescriptions for antibiotic-corticosteroid combination products. Compared with whites, blacks (OR, 0.89; 95% CI, 0.86-0.92) and Latinos (OR, 0.83; 95% CI, 0.81-0.86) had lower odds of filling antibiotic prescriptions. More affluent and educated enrollees had higher odds of filling antibiotic prescriptions compared with those with lesser affluence and education (P < 0.01 for all). Compared with persons initially diagnosed with acute conjunctivitis by ophthalmologists, enrollees had considerably higher odds of antibiotic prescription fills if first diagnosed by an optometrist (OR, 1.26; 95% CI, 1.21-1.31), urgent care physician (OR, 3.29; 95% CI, 3.17-3.41), internist (OR, 2.79; 95% CI, 2.69-2.90), pediatrician (OR, 2.27; 95% CI, 2.13-2.43), or family practitioner (OR, 2.46; 95% CI, 2.37-2.55). Antibiotic prescription fills did not differ for persons with versus without risk factors for development of serious infections, such as contact lens wearers (P = 0.21) or patients with human immunodeficiency virus infection or AIDS (P = 0.60). CONCLUSIONS: Nearly 60% of enrollees in this managed care network filled antibiotic prescriptions for acute conjunctivitis, and 1 of every 5 antibiotic users filled prescriptions for antibiotic-corticosteroids, which are contraindicated for acute conjunctivitis. These potentially harmful practices may prolong infection duration, may promote antibiotic resistance, and increase costs. Filling antibiotic prescriptions seems to be driven more by sociodemographic factors and type of provider diagnosing the enrollee than by medical indication.


Assuntos
Antibacterianos/uso terapêutico , Conjuntivite Bacteriana/tratamento farmacológico , Prescrições de Medicamentos/estatística & dados numéricos , Uso de Medicamentos/estatística & dados numéricos , Programas de Assistência Gerenciada/estatística & dados numéricos , Doença Aguda , Adolescente , Adulto , Idoso , Criança , Pré-Escolar , Estudos de Coortes , Conjuntivite Bacteriana/microbiologia , Feminino , Humanos , Lactente , Recém-Nascido , Masculino , Pessoa de Meia-Idade , Soluções Oftálmicas , Estudos Retrospectivos , Estados Unidos
18.
J Liposome Res ; 27(4): 312-323, 2017 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27241274

RESUMO

The aim of this study is to develop and evaluate niosomal dispersions loaded with the hydrophilic drug; lomefloxacin Hcl (LXN) for the management of ocular bacterial conjunctivitis. LXN-loaded niosomes were prepared by the thin film hydration method following a full factorial formulation design. Two independent variables were evaluated: the type of surfactant (X1) and the surfactant:cholesterol ratio (X2). The dependent variables comprised entrapment efficiency (EE%: Y1), particle size (PS: Y2) and zeta potential (ZP: Y3). The optimum formulation, N-LXN14 (Tw60: CH, 1:1), was spherical in shape and exhibited EE% of 68.41 ± 0.07, PS of 176.0 ± 0.98 and ZP of -40.70 ± 2.20 with a sustained release profile over 8 hours following the Higuchi model. N-LXN14 proved good physicochemical stability under refrigeration up to 3 months. Ocular irritancy test showed no signs of ocular toxicity, confirming the safety and suitability for ocular application. Microbiological evaluation of the antibacterial effect of N-LXN14 was conducted using the susceptibility test and through the induction of topical conjunctivitis by Staphylococcus aureus (S. aureus) followed by topical therapy. Susceptibility test manifested significantly higher percent inhibition of S. aureus and higher AUC0-12 h of N-LXN14 (604.59 ± 0.05) compared to the commercial product (126.25 ± 0.049). Both clinical observation and colony count of the infected eyes after eight days of treatment demonstrated significant improvement in therapeutic response. The infected eyes were completely healed with eradication of S. aureus. In conclusion, the results showed that LXN niosomal dispersions may serve as a promising superior ocular delivery system in the treatment of bacterial conjunctivitis.


Assuntos
Olho/efeitos dos fármacos , Fluoroquinolonas/química , Fluoroquinolonas/farmacologia , Lipossomos/química , Animais , Antibacterianos/química , Antibacterianos/uso terapêutico , Química Farmacêutica/métodos , Colesterol/química , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Bacteriana/microbiologia , Portadores de Fármacos/química , Liberação Controlada de Fármacos , Estabilidade de Medicamentos , Fluoroquinolonas/administração & dosagem , Fluoroquinolonas/uso terapêutico , Humanos , Concentração de Íons de Hidrogênio , Masculino , Microscopia Eletrônica de Transmissão/métodos , Tamanho da Partícula , Coelhos , Staphylococcus aureus/efeitos dos fármacos , Propriedades de Superfície , Tensoativos/química
19.
Med J Malaysia ; 72(3): 197-198, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28733571

RESUMO

This case report discusses the rare association of cerebral abscess related to conjunctivitis in an otherwise healthy child. A 6 year old boy presented with conjunctivitis was treated with topical antibiotics and resolved after a week. Conjunctival swab cultures grew MRSA. A month later he developed status epileptics and CT scans revealed a large cerebral abscess. He was treated with intravenous antibiotics which covered for MRSA, along with an incision and drainage for the cerebral abscess. Pus cultures grew MRSA. The patient recovered well with no disturbance in visual acuity or visual field. On post-operative follow ups, he had no other neurological deficit apart from a slight limp.


Assuntos
Abscesso Encefálico/etiologia , Conjuntivite Bacteriana/complicações , Infecções Estafilocócicas/microbiologia , Antibacterianos/administração & dosagem , Antibacterianos/uso terapêutico , Abscesso Encefálico/diagnóstico por imagem , Abscesso Encefálico/tratamento farmacológico , Abscesso Encefálico/microbiologia , Criança , Conjuntivite Bacteriana/tratamento farmacológico , Conjuntivite Bacteriana/microbiologia , Drenagem , Humanos , Infusões Intravenosas , Linezolida/administração & dosagem , Linezolida/uso terapêutico , Masculino , Staphylococcus aureus Resistente à Meticilina , Neuroimagem , Infecções Estafilocócicas/tratamento farmacológico , Tomografia Computadorizada por Raios X
20.
Graefes Arch Clin Exp Ophthalmol ; 254(3): 577-82, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26810921

RESUMO

INTRODUCTION: Characteristics of ophthalmia neonatorum (ON) amongst paediatric ophthalmologists remain unclear. The purpose of this current study is to examine the incidence, diagnosis, treatment, and prophylaxis of ON cases presenting to members of the American Association of Paediatric Ophthalmology and Strabismus (AAPOS). METHODS: An email containing a web link to a survey was sent to all members of AAPOS. The questionnaire examined the incidence of ON, etiology, diagnostic methods, treatment, and prophylaxis of the disease in different countries around the world. RESULTS: Two hundred and ninety-one ophthalmologists answered the questionnaire. Most were from North America (52.94 %). One hundred and seventy-six (60.69 %) ophthalmologists encountered 0-5 cases of ON per year. The most common pathogens causing ON was Chlamydia trachomatis (35.37 %). Two hundred and forty-two (85.21 %) treat empirically when encountering ON during the first 10 days of life and 205 (75.09 %) after the first 10 days of life. In both cases, erythromycin was the most common first line of treatment. Two hundred and twenty-two (78.72 %) ophthalmologists replied that prophylactic treatment is required in their country. The most common agent for prophylaxis was erythromycin ointment (71.50 %). CONCLUSIONS: We found that the incidence of ON per year per practitioner is 0-5 cases, the most common etiology is C. trachomatis, and most infants receive prophylaxis and treatment.


Assuntos
Anti-Infecciosos/uso terapêutico , Antibioticoprofilaxia , Conjuntivite Bacteriana/tratamento farmacológico , Oftalmia Neonatal/tratamento farmacológico , Oftalmologia/estatística & dados numéricos , Padrões de Prática Médica/estatística & dados numéricos , Conjuntivite Bacteriana/diagnóstico , Conjuntivite Bacteriana/epidemiologia , Conjuntivite Bacteriana/prevenção & controle , Saúde Global , Inquéritos Epidemiológicos , Humanos , Incidência , Recém-Nascido , Oftalmia Neonatal/diagnóstico , Oftalmia Neonatal/epidemiologia , Oftalmia Neonatal/prevenção & controle , Oftalmologia/organização & administração , Sociedades Médicas , Inquéritos e Questionários
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA