Application Of Povidone-iodine Research Articles

In vivo assessment of antimicrobial activity and toxicity of repeated 1% povidone-iodine applications vs a single 5% povidone-iodine application.

To demonstrate the noninferiority in antimicrobial effectiveness of thrice-repeated applications of 1% povidone-iodine (PI) compared with a single application of 5% PI on the ocular surface in vivo and to evaluate potential toxicity of PI to the corneal epithelium. Department of Ophthalmology, Shaare Zedek Medical Center, Jerusalem, Israel. Prospective, randomized, double-blind study. Patients randomly received either a single application of 5% PI or repeated irrigations of 1% PI on the ocular surface preoperatively. Bacterial colony counts were quantitatively analyzed by taking standardized conjunctival swabs before and after irrigation, and differences in bacterial colony counts were compared between the 2 groups. The presence of superficial punctate keratopathy was evaluated in all patients by the National Eye Institute grading system. The study comprised 102 eyes of 102 patients. Both 1% and 5% PI yielded a marked decrease in bacterial colonies compared with before application ( P < .001). The repeated application of 1% PI showed a significantly lower bacterial count compared with the single application of 5% PI ( P < .05) and resulted in significantly less damage to the corneal epithelium compared with a single 5% PI application ( P < .001). Preoperative repeated applications of 1% PI effectively eradicated ocular surface bacteria equal to that of 5% PI with a less deleterious effect on the corneal epithelium. Our findings suggest that 1% PI may be a promising alternative to 5% PI.

Getting the drop on Staphylococcus aureus: Semiquantitative Staphylococcus aureus nasal colony reduction in orthopedic surgery reduces surgical site infection

Surgical site infection (SSI) is a frequent health care-associated infection. We aimed to reduce SSI risk after joint arthroplasty and spine surgery by reducing Staphylococcus aureus colonization burden with presurgery intranasal povidone-iodine (PVP-I) application in conjunction with skin antisepsis ("the intervention"). Retrospective case-control study; postintervention cohort versus a historical cohort. Adults who underwent joint arthroplasty or spine surgery during February 2018 through October 2021 ("post-intervention cohort") included. In the analysis cases any patient who underwent surgery and developed SSI within 90 days postsurgery, controls had no SSI. Postintervention cohort data were compared with a similar retrospective 2016 to 2017 patient cohort that did not use intranasal PVP-I. The postintervention cohort comprised 688 consecutive patients aged 65y/o, 48.8% male, 28 cases, and 660 controls. Relatively more cases than controls had diabetes mellitus (P=.019). There was a 39.6% eradication rate of S aureus nasal colonization post intranasal PVP-I (P<.0001). SSI rate was higher in patients positive versus those negative for S aureus on a 24-hour postsurgery nasal culture (P<.0001). The deep SSI rate per 100 operations postintervention versus the historical cohort decreased for all surgical procedures. Semiquantitative S aureus nasal colony reduction using intranasal PVP-I is effective for decreasing SSI rate in joint arthroplasty and spine surgery. In patients with presurgery S aureus nasal colonization additional intranasal PVP-I postsurgery application should be considered.

Enquête de qualité de vie auprès de 3738 patients traités par injections intravitréennes pour leur dégénérescence maculaire liée à l’âge

To evaluate the peri- and post-intravitreal injection (IVI) symptoms reported by patients who have been repeatedly injected for age-related macular degeneration (AMD) and to analyze these according to the protocols of the injector. Multi-center, cross-sectional, consecutive, analytical survey. The IVI protocols of 106 injectors differed in terms of the number of instillations of povidone-iodine, its contact time, and rinsing of the ocular surface post-injection. In total, 3,738 patients responded to the survey, 60.1% of whom were women; 36.4% had received more than 20 IVIs; 50.7% of patients reported irritation upon application of povidone-iodine. Post-IVI, depending on the symptom in question, between 44.8% and 57.4% of patients reported symptoms of ocular surface change. The number of instillations of povidone-iodine, its contact time with the ocular surface, and abundant rinsing post-IVI increased the immediate symptoms. Patients who received more IVIs were more prone to experiencing gritty eyes, and the incidence of acute pain increased in patients who had previously received over 20 IVIs. Women and patients previously treated for dry eye or glaucoma were at greater risk of worse symptoms. Comparing injecting centers' practices with patients' self-assessments showed an aggravation of symptoms of ocular surface changes related to povidone-iodine. This survey contributes to providing data for the implementation of a protocol to improve the quality of life of patients injected repeatedly for AMD.

BENEFICIAL EFFECTS OF A NOVEL INTRAOPERATIVE SURGICAL IRRIGANT ON POST-OPERATIVE KNEE SWELLING AND LIMB FUNCTION IN PRIMARY TOTAL KNEE ARTHROPLASTY

Total knee arthroplasty (TKA) is one of the most common elective orthopedic procedures performed in inpatient and outpatient settings. Swelling, stiffness and pain are common complications that occur after TKA resulting in functional impairment of the joint. Reducing post-operative (PO) inflammation, which consequently helps mitigate edema, swelling and pain, is critical to functional recovery after surgery. This pilot study was designed to evaluate the effects of the intraoperative application of a novel surgical irrigant called XPERIENCE® Advanced Surgical Irrigation (XP), on post TKA lower extremity swelling, joint function, and pain, as part of an all-encompassing swelling reduction regimen. Intraoperative povidone-iodine (PI) application was used as the control. Swelling; an indicator of inflammation, was measured by single frequency-bioimpedance assessment (SF-BIA). Range of motion (ROM) and reliance on ambulatory assistive devices (AAD) were evaluated as indicators of functional recovery. Narcotic consumption for pain management and numerical pain scoring were evaluated as surrogate, limited indicators of quality of life. These parameters were assessed over a period of 6 weeks post index TKA and compared between the control cohort treated intraoperatively with PI and the intervention cohort treated intraoperatively with XP. Intraoperative irrigation with XP resulted in statistically significant improvements in PO swelling at days 7 (p&lt;0.05) and 14 (p&lt;0.01) post index surgery compared to the PI treated control cohort. Statistically significant improvements in ROM at day 7 (p=0.043) and AAD usage at day 21 (p=0.049) were noted in the XP cohort compared to the PI cohort. The XP cohort exhibited a quicker “weaning off opioids” timeline evidenced by the PI cohort reaching half of the maximum percentage of subjects using opioids 8 days later than the XP cohort. There was no statistically significant difference noted in numerical pain scores between the two cohorts. This pilot study signifies the utility of XP as a multifunctional, intraoperative surgical irrigation solution which has demonstrable benefits of reducing PO swelling with the potential to impact functional recovery after TKA.

The Inflammatory and Cytological Effect of Repeated Povidone-Iodine Application in Patients Receiving Intravitreal Injections.

To investigate the effect of repeated povidone-iodine (PVI) application on the ocular surface parameters of patients who received intravitreal injections. In this prospective study, 52 eyes of 52 patients with age-related macular degeneration who underwent unilateral intravitreal injection at least three times in the last 1 year (intravitreal injection [IVI] group), 52 fellow eyes with no previous intravitreal injection (NIVI group), and 51 eyes of 51 healthy subjects (control) were included. Tear break-up time (TBUT), the Schirmer test, the Oxford staining score, the Ocular Surface Disease Index questionnaire, conjunctival impression cytology, and tear inflammatory cytokine levels (interleukin [IL]-1β and IL-6) were analyzed in all participants. The IVI group had lower TBUT and higher Oxford staining score than the NIVI and control groups ( P <0.05). No significant difference was found between the groups in the Schirmer test ( P =0.161). Conjunctival impression cytology analysis revealed that the IVI group had a significantly lower goblet cell count and significantly higher Nelson staging result than the NIVI and control groups ( P <0.05). As a result of tear cytokine analysis, although IVI and NIVI groups had higher IL-1β and IL-6 levels than the control group ( P <0.05), there was no difference between NIVI and IVI groups ( P ≥0.05). Repeated PVI application caused cytotoxic injury to the ocular surface, resulting in goblet cell loss and squamous metaplasia of epithelial cells. As a result, the stability of the tear film layer was found to be impaired and ocular surface-related symptoms developed in patients.

Lowering the Incidence of Endophthalmitis Following Intravitreal Anti-VEGF Injection: An Analysis of Aseptic Protocol Adjustment.

The impact of anti-sepsis-anesthesia sequence in intravitreal injection (IVI)-associated endophthalmitis is unknown. We compared outcomes of patients who had 10% topical povidone-iodine before or after 2% topical lidocaine gel during IVIs. A retrospective study of IVIs in nine clinical sites was undertaken. Group 1 had lidocaine gel applied first. This protocol was changed on March 1, 2020, with Group 2 having povidone-iodine applied first. Visual and micro-biological outcomes were compared. Among 72 cases (0.07%) from 102,908 IVIs, Group 1 had 59 cases from 65,307 IVI (0.09%) and Group 2 had 13 cases from 37,601 IVI (0.03%; P = 0.001). There was no significant difference in the best-corrected visual acuity between groups. Highly virulent bacteria were predominantly isolated in Group 1, but proportions of gram-positive bacterial growth were similar. Application of povidone-iodine before lidocaine gel, compared to after, significantly decreased rate of IVI endophthalmitis, with no significant changes in visual and microbiological outcomes. [Ophthalmic Surg Lasers Imaging Retina 2023;54:520-525.].

Pain during PICC insertion in preterm infants: the needle is not the only problem

Objective To evaluate whether warm povidone-iodine (PI) application before peripherally inserted central catheter (PICC) placement eased pain related to the procedure in premature infants and reduced the duration of the procedure and the number of attempts. Methods A prospective randomized controlled trial was conducted with infants born before 32 weeks of gestation who required the first placement of the PICC. Skin disinfection was performed with warm PI before the procedure in the warm PI(W-PI) group, whereas PI kept at room temperature was used in the regular PI(R-PI) group. NPASS scores of the infants were evaluated three times: at baseline(T0), during skin preparation(T1), and during needle insertion(T2). Results Fifty-two infants (26 in the W-PI group,26 in the R-PI group) were enrolled in the study. The perinatal and baseline demographic characteristics did not significantly differ between the two groups. While the median NPASS scores at T0 and T2 were similar between the groups, the median T1 score was significantly higher in the R-PI group(p = .019). While the median NPASS scores at T1 and T2 were similar in the R-PI group, there was a significant difference in the W-PI group, with NPASS scores being significantly lower at T1 compared to T2. The results demonstrate that skin disinfection was just as painful as needle insertion in the R-PI group. The duration of the procedure and the number of needle insertions were significantly lower in the W-PI group. Conclusions Before invasive interventions, such as PICC insertion, we recommend warm PI as a part of non-pharmacological pain management.

Topical antibiotic prophylaxis before intravitreal injections: a pilot study.

To explore whether topical antibiotic prophylaxis in patients scheduled for intravitreal injections achieves surface sterility in a greater proportion of subjects as compared to povidone-iodine alone. A randomized, triple-blind clinical trial. patients scheduled for intravitreal injections for maculopathy. any sex and race, age 18years and above. Subjects were randomized into 4 groups: the first group applied chloramphenicol (CHLORAM), the second netilmicin (NETILM), the third a commercial ozonized antiseptic solution (OZONE), and the fourth applied no drops (CONTROL). percentage of non-sterile conjunctival swabs. Specimens were collected before and after the application of 5% povidone-iodine moments before the injection. Ninety-eight subjects (33.7% females, 64.3% males), mean age: 70.2 ± 9.3years (54-91). Before povidone-iodine, both the CHLORAM and NETILM group showed a lower percentage of non-sterile swabs (61.1% and 31.3% respectively), as compared to the OZONE (83.3%) and CONTROL (86.5%) groups (p < .04). However, this statistical difference was lost after the application of povidone-iodine for 3min. Percentage of non-sterile swabs in each group after applying 5% povidone-iodine: CHLORAM 11.1%, NETILM 12.5%, CONTROL 15.4%, OZONE 25.0%. This was not statistically significant (p > .05). Topical antibiotic prophylaxis with chloramphenicol or netilmicin drops decreases the bacterial load on the conjunctiva. However, after the application of povidone-iodine, all groups showed a significant reduction in the percentage of non-sterile swabs, and this value was comparable among all groups. For this reason, authors conclude that povidone-iodine alone is sufficient and prior topical antibiotic prophylaxis is not indicated.

Quality improvement study on the effectiveness of intranasal povidone-iodine decolonization on surgery patients

Surgical site infection prevention and treatment remains a challenge in healthcare settings globally. The routine use of intranasal mupirocin for decolonization has challenges and preoperative intranasal povidone-iodine decolonization is another option. The purpose of this quality improvement study was to assess if a one-time preoperative intranasal povidone-iodine application could reduce the risk of the likelihood of nasal carriage of Staphylococcus aureus after surgery. Ambulatory Surgery Center patients were enrolled in an intranasal povidone-iodine decolonization quality improvement study as they reported at the pre-operative holding area. Pre-decolonization intranasal samples were collected, followed by intranasal application of povidone-iodine. Patients waited for a minimum of 20 minutes after application before proceeding with surgery. Nasal samples were again collected after surgery. Each sample was tested for S.aureus colonization using the 16S rRNA-mecA-nuc triplex polymerase chain reaction, standard biochemical tests, and qualitative culturing. In the 98 patients enrolled, 36% of these patients had intranasal colonization with S.aureus by 16S rRNA-mecA-nuc triplex polymerase chain reaction before surgery. Using a qualitative culture technique, 28% of patients tested positive for S.aureus before surgery and 20% of patients tested positive for S.aureus after surgery (P= 0.039). Intranasal preoperative povidone-iodine is an effective strategy in the decolonization of S.aureus from the nares if properly implemented.

Post COVID Mucormycosis Prevention With Oro-Nasal Application of Povidone Iodine (Pvp-I)

In March 2020 WHO declared COVID-19 as pandemic while April 2021 Indian authority concede to declare a significantly increased incidence of “Black Fungus” among the COVID-19 patients. The primary route of infection for Mucormycosis or fungal infection following COVID-19 is inhalation or ingestion resulting accumulation of the agents in nose, para-nasal sinuses and mouth. The spores of black fungus intrude neural and vascular structure, which cause mucosal necrosis due to thrombosis in vasculature. The extension of the disease then increases through further destruction of bones of para-nasal sinus as well as neural and vascular route dissemination. We thought about removing, neutralizing or destroying the culprit fungi from its route of entry zone, i.e. nose and mouth. Povidone Iodine (PVP-I) is a microbicidal agent having effective fungicidal as well as virucidal and bactericidal property. PVP-I can be used in both oral and nasal cavity safely. Efficacy and safety of PVP-I is proved in nose in case of COVID-19. PVP-I is proved effective against different fungi at different concentration at different site. So, we recommend Povidone Iodine nasal spray or irrigation and mouthwash for gargling for these vulnerable group of patients in large scale to prevent post-COVID mucormycosis or fungal infection. J Dhaka Med Coll. 2021; 30(2) : 176-179

Associations between Serial Intravitreal Injections and Dry Eye

To investigate the effects of serial intravitreal injections (IVI) on the ocular surface and meibomian glands (MG) in patients treated with anti-vascular endothelial growth factor (anti-VEGF) for neovascular age-related macular degeneration (nAMD). Retrospective controlled observational study. Patients with nAMD receiving unilateral IVI with anti-VEGF agents. The fellow eye was used as control. Tear film and ocular surface examinations were performed on a single occasion at a minimum of four weeks after IVI. A pre-IVI asepsis protocol with povidone-iodine was applied. Upper and lower MG loss, tear meniscus height (TMH), bulbar redness score (BR), non-invasive tear break-up time (NIBUT), tear film osmolarity (TOsm), Schirmer test, corneal staining, fluorescein tear film break-up time (TBUT), meibomian gland expressibility (ME) and meibum quality (MQ). Ninety patients with a mean age of 77.5 years (SD 8.4; range 54-95) were included. The median number of IVI in treated eyes was 19.5 (range 2-132). Mean MG loss in the upper eyelid was 19.1 (SD 11.3) % in treated eyes and 25.5 (SD 14.6) % in untreated fellow eyes (P=0.001). For the lower eyelid, median MG loss was 17.4 (IQR 9.4-29.9) % in treated eyes and 24.5 (IQR 14.2-35.2) % in fellow eyes (P<0.001). Mean BR was 1.32 (SD 0.46) in treated eyes versus 1.44 (SD 0.45) in fellow eyes (P=0.017). Median TMH was 0.36 (IQR 0.28-0.52) mm in treated eyes and 0.32 (IQR 0.24-0.49) mm in fellow eyes (P=0.02). There were no differences between treated and fellow eyes regarding NIBUT, TOsm, Schirmer test, corneal staining, fluorescein TBUT, meibomian gland expressibility ME or MQ. Repeated IVI with anti-VEGF with preoperative povidone-iodine application was associated with reduced meibomian gland loss, increased tear volume and reduced signs of inflammation compared to fellow non-treated eyes in patients with nAMD. This regimen may thus have a beneficial effect on the ocular surface.

1911. A Pilot Study to Evaluate the Effectiveness of Nasal and Oral Povidone Iodine in Reducing the Burden of Severe Acute Respiratory Syndrome 2 RNA in Patients with COVID-19

Abstract Background Nasal and oral application of topical antiseptics such as povidone iodine could potentially reduce the risk for transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). However, limited information is available on the efficacy of such agents in reducing the burden of SARS-CoV-2. Methods We conducted a pilot non-blinded, randomized trial to compare the effectiveness of 3 doses of povidone iodine (each dose with 10% intranasal and 1% gargle) administered every 8 hours versus the control with phosphate-buffered saline in reducing the burden of SARS-CoV-2 RNA in the nares and oropharynx of patients with COVID-19. Swabs were used to collect anterior nares and oropharynx samples before the first and second doses and 8 hours after the final dose (24 hours after the initial dose). Real-time polymerase-chain reaction (RT-PCR) was used to assess the burden of viral RNA. Analysis of variance was used to compare cycle threshold values for povidone iodine versus control patients. Subjects were surveyed about adverse reactions to treatment. Results As shown in the figure, SARS-CoV-2 cycle thresholds were similar in the povidone iodine (N=10 subjects) and control (N=8 subjects) groups prior to treatment. After initiation of treatment, there was no significant difference in cycle thresholds for the povidone iodine versus control subjects (P &amp;gt;0.05). No adverse effects of treatment were reported. Effect of intranasal and oral application of povidone iodine versus phosphate-buffered saline on nasal and oropharyngeal SARS-CoV-2 RNA. Error bars show standard error. Conclusion Our findings suggest that that nasal and oral application of povidone iodine have limited effectiveness in reducing the burden of SARS-CoV-2. Future studies are needed to assess for effectiveness of more frequent dosing intervals and to determine if povidone iodine reduces recovery of viable virus by culture. Disclosures All Authors: No reported disclosures.

Effect of Increasing Povidone-Iodine Exposure on Corneal Epithelium and Impact on Donor Rim Cultures.

The purpose of this study was to assess the effect of a second povidone-iodine (PVP-I) application at the time of donor tissue recovery on overall tissue quality and to analyze the rate of positive fungal and bacterial rim cultures before and after implementing increased PVP-I exposure. The left cornea was recovered after a single application of PVP-I, while the right cornea was recovered after double PVP-I application in research-consented donors. The epithelial cell death rate was estimated using viability assay in corneal whole mounts under 10× objective (n = 5). Clinical characteristics of epithelium, stroma, and endothelium; positive rim culture rate; and incidences of infectious postoperative adverse reactions were compared for a period of 14 months before and after implementation of increased PVP-I protocol. The average epithelial cell death rate was unaltered between single and double PVP-I exposure groups. We observed a modest 10% increase in the number of tissues with mild edema after implementation of increased PVP-I exposure. Nonetheless, the percentage of tissues with moderate or severe edema was unaltered. The average positive rim culture rate decreased from 1.17% to 0.88% (P = 0.075) after implementation of the double PVP-I soak procedure. There has been only one report of infectious postoperative adverse reactions since this procedure change. By contrast, there were 5 reports for a period of 14 months before implementation of this protocol. These results indicate that new donor preparation methods with an additional 5 minutes of PVP-I exposure do not affect tissue quality, reduce positive rim cultures, and lead to lower incidence of postoperative infection.

Feasibility and acceptability of intranasal povidone iodine decolonization among orthopedic trauma surgery patients

Background: Nasal decolonization significantly decreases the incidence of Staphylococcus aureus surgical-site infections (SSIs). Patient adherence with self-administration of a decolonization ointment (ie, mupirocin) is low, especially among patients having urgent surgery. Povidone-iodine decolonization may overcome patient adherence challenges because povidone-iodine needs to be applied only on the day of surgery. We assessed the effectiveness and acceptability of povidone-iodine decolonization given on the day of surgery among patients having orthopedic trauma surgery. Methods: Adult patients who underwent operative fixation of traumatic lower extremity fractures were consented to receive 10% intranasal povidone-iodine solution. Povidone-iodine was applied ~1 hour before surgical incision and was reapplied the evening after surgery. Patients were tested for S. aureus nasal colonization before surgery, the evening after surgery (before povidone-iodine reapplication), and the day after surgery. Swabs were inoculated into Dey-Engley neutralizer and processed in a vortexer. A series of dilutions were performed and plated on mannitol salt agar plates. S. aureus cultures were quantitatively assessed to determine the reduction in S. aureus after povidone-iodine use. Reductions in S. aureus nasal growth were evaluated using the Skillings-Mack test. SSIs manifesting within 30 and 90 days of surgery were identified using NHSN definitions. A survey was administered the morning after surgery to determine the acceptability of intranasal povidone-iodine. Results: In total, 51 patients participated in this pilot study between February 2020 and June 2021. Nasal samples from 12 participants (23.5%) grew S. aureus. The S. aureus concentration decreased significantly across the time points (P = .03) (Fig. 1). No SSIs were identified within 30 days of surgery. One SSI occurred within 90 days of surgery; this patient did not carry S. aureus, and cultures from the infected site were negative. Also, 31% of patients reported at least 1 mild side effect while using povidone-iodine: dripping (n = 7), itching (n = 6), dryness (n = 4), stinging (n = 4), staining (n = 3), unpleasant taste (n = 3), runny nose (n = 2), burning (n = 1), sneezing (n = 1), sore throat (n = 1), tickling (n = 1), and/or cough (n = 1). Also, 86% of patients stated that povidone-iodine felt neutral, pleasant, or very pleasant, and only 14% stated that it felt unpleasant or very unpleasant. Discussion: In this pilot study, 2 applications of nasal povidone-iodine on the day of surgery were acceptable for patients, and this protocol significantly reduced S. aureus concentration in nares of patients. Future large clinical trials should evaluate whether this 2-application regimen of povidone-iodine significantly decreases rates of SSI among orthopedic trauma surgery patients.Funding: PDI HealthcareDisclosures: None

The role of preprocedural mouth rinse application in decreasing COVID-19 transmission in Dental Care Settings: A mini-review

The COVID-19 virus present in saliva and respiratory droplets is a possible high-risk source of viral transmission in health care settings. Dental practitioners and dentists in particular are highly susceptible to virus acquisition from their source patients. Mouthwashes before dental examination and procedures may be one possible solution to decrease the viral burden in the mouth, hence reducing transmission probability. Application of hydrogen peroxide, cetylpyridinium chloride, povidone-iodine, and chlorhexidine have been proposed to achieve this target. This paper aims to investigate for evidence in the literature for a decrease in the viral burden following preprocedural application of different mouthwashes.

Efficacy of Povidone Iodine Against Microbial Biofilms in Breast Implants With Different Textures: Results From an in vitro Study.

BackgroundIn the practice of breast augmentation and reconstruction, implant irrigation with various solutions has been widely used to prevent infection and capsular contracture, but to date, there is no consensus on the optimal protocol to use. Recently, application of povidone iodine (PI) for 30 min has shown in vitro to be the most effective irrigating formula in reducing contamination in smooth breast implants. However, as 30 min is not feasible intraoperatively, it is necessary to determine whether shorter times could be equally effective as well as to test it in both smooth and textured implants.MethodsWe tested the efficacy of 10% PI at 1′, 3′, and 5′ against biofilms of 8 strains (2 ATCC and 6 clinical) of Staphylococcus spp. on silicone disks obtained from Mentor® and Polytech® implants of different textures. We analyzed the percentage reduction of cfu counts, cell viability and bacterial density between treatment (PI) and control (sterile saline, SS) groups for each time of application. We consider clinical significance when > 25% reduction was observed in cell viability or bacterial density.ResultsAll textured implants treated with PI at any of the 3 exposure times reduced 100% bacterial load by culture. However, none of the implants reached enough clinical significance in percentage reduction of living cells. Regarding bacterial density, only 25–50 μm Polytxt® Polytech® implants showed significant reduction at the three PI exposure times.ConclusionPI is able to inhibit bacterial growth applied on the surface of breast implants regardless of the exposure time. However, no significant reduction on living cells or bacterial density was observed. This lack of correlation may be caused by differences in texture that directly affect PI absorption.

Antibiotic prophylaxis with amoxicillin to prevent infective endocarditis in periodontitis patients reconsidered: a narrative review.

To discuss first, the adequacy of the antibiotic prophylaxis regimen currently recommended for the prevention of infective endocarditis in periodontitis patients, and second, preventive measures to decrease the rate of bacteraemia after periodontal treatment. A bibliographic literature search identifying clinical trials between January 1990 and January 2021, focusing on microorganisms in bacteraemia after periodontal treatment and bacteria in infective endocarditis, was performed. Two reviewers independently identified and screened the literature by systematically searching in Medline/Premedline, EMBASE and Cochrane Library. Two hundred and seventy articles were identified, of which twenty-three met the inclusion criteria. Bacteraemia rates after periodontal treatment ranged from 10-94% in the investigated patients. Mainly oral pathogens related to infective endocarditis, such as viridans group streptococci (up to 70%) and HACEK group pathogens (e.g., Aggregatibacter actinomycetemcomitans), were detected. But typical oral and periodontopathogenic species, such as Porphyromonas spp. (P.s gingivalis) (up to 50%), Actinomyces spp. (up to 30%) and Fusobacterium spp. (up to 30%), which do not usually cause infective endocarditis, were also found. Infective endocarditis episodes that might have been in association with a dental treatment were mainly caused by viridans group streptococci. Prophylactic measures like rinse application of chlorhexidine, povidone-iodine or essential oils, diode laser or systemic antibiotic prescription were described as decreasing the bacteraemia rate after periodontal interventions to 5-70%. The currently recommended systemic antibiotic prophylaxis with amoxicillin before periodontal treatment in high-risk cardiovascular patients still covers the most common oral bacteria causing infective endocarditis, namely viridans group streptococci, and therefore seems adequate in this context. Since bacteraemia, not infective endocarditis, is the endpoint in most studies, the causality between bacteraemia after periodontal treatments and infective endocarditis remains difficult to elucidate. Until more evidence is available regarding this, adherence to current guidelines for antibiotic prophylaxis in patients at high risk for infective endocarditis undergoing periodontal treatment remains recommended.

Low-concentration povidone-iodine for the prevention of intraocular infections in ophthalmic surgery.

Endophthamitis following intraocular surgery is rare using current antiseptic techniques, such as single application of 5% povidone-iodine to the ocular surface and adjuvant topical or intracameral antibiotics. Challenges remain, however, including increased multidrug-resistant bacterial endophthalmitis, increased fungal endophthalmitis, and the low but nonzero endophthalmitis rate attributable to the typical bacteria that colonize the ocular surface. Povidone-iodine has a wide spectrum of activity, including activity against novel pathogens, such as SARS-CoV-2. Povidone-iodine alternatives, such as hypochlorous acid can have significantly less efficacy in vitro against endophthalmitis isolates. Repetitive application of dilute povidone-iodine has an excellent safety profile and strong evidence base for efficacy. Povidone-iodine is widely available, inexpensive, and commonly used by ophthalmologists. The repetitive application of dilute povidone-iodine is a well studied, well tolerated, and efficacious way to transiently sterilize the ocular surface during intraocular surgery. Additional benefits include activity against multidrug-resistant bacteria, fungi, and lack of inducible resistance.

Topical Application of Povidone Iodine to Minimize Post Appendectomy Wound Infection

Background: Despite the use of prophylactic antibiotic and sterilization techniques and nemours methodsof wound care, post appendectomy wound infection is still high.Methods: Arandomized controlstudy (RCS) has been implied to prove, whether uses of povidone iodinejust prior to wound suturing could decrease surgical wound infection rates after surgery for appendectomy.Atotal number of 120 patients operated for cute appendicitis with open appendectomy at AL-MawaniTeachingHospital during the period from march 2016 to October 2020.Results: After appendectomy patients was randomize into three groups, group A which include 40 patientsthe subcutaneous tissue was irrigated with 1% diluted povidone-iodine solution before skin closure.Group B which contained other 40 patients the wound has been washed with normal saline, and in groupC(controlgroup) no irrigation was done.All patients were followed for surgical site infection according toSouthampton wound grade system for ten days after surgery.In this study we notice that areductionhappenedin the number of wound infection in group Acompare with group B and C.Conclusion: The uses of povidone iodine 1% before skin closure is an effective method in reducing the rateof infection of the wound after surgery for acute appendicitis.

An effective method to reduce the risk of endophthalmitis after intravitreal injection (IVI): Application of 0.25% povidone-iodine

Background/Aim: The most important complication after intravitreal injection (IVI) is endophthalmitis, which can result in severe vision loss. This study aims to investigate the effect of 0.25% povidone-iodine (PI) application before IVI on the incidence of endophthalmitis in patients who received intravitreal anti-vascular endothelial growth factor (anti-VEGF) injection. Methods: A total of 15345 intravitreal anti-VEGF injections and nine endophthalmitis cases after IVI performed at the outpatient injection room of a single university hospital between January 2017 and January 2020 were included in this retrospective cohort study. Before July 2018, after applying 10% PI around the eyes and 5% PI on the eyes, an eyelid speculum was inserted, and the injection was performed. After this date, in addition to these steps, after placing a speculum and determining the injection site with a caliper, 3-4 drops of 0.25% PI were applied just before injection. Topical antibiotics were not used before or after the injection. Results: Nine cases of endophthalmitis were detected in 3 years. The most common symptoms were vision loss (9/9) and pain in the eye (7/9). All cases had conjunctival hyperemia, cells-hypopyon in the anterior chamber, and cells in the vitreous. The time between injection and re-visiting the clinic due to endophthalmitis symptoms ranged between 2-6 days, and visual acuity varied between hand motion and 0.2. While the number of endophthalmitis cases before July 2018 was 8 (8/8330) in 1.5 years, after the addition of 0.25% PI application to the protocol, only 1 case of endophthalmitis (1/7015) was seen in the last 1.5 years. The rate of endophthalmitis had decreased significantly (P=0.037). Conclusion: Since July 2018, the addition of 0.25% PI to the standard IVI protocol just before injection has significantly reduced endophthalmitis rates. With this method, endophthalmitis rates may be decreased despite the increasing number of IVIs.