Antimicrobial Activity of Plasma Rich in Platelets (PRP) on the Ocular Microbiota of Healthy Horses from Minas Gerais: In Vitro Study.

In equine ophthalmology, ulcerative keratitis is among the most common conditions and, in general, arises as a consequence of some trauma suffered. Secondarily, subsequent contamination by pathogenic or resident bacteria of the horse's ocular microbiota may have undesirable consequences. Under physiological conditions, the normal microbiota coexists with the immune status of the host, serving as a barrier, ensuring the health of the ocular surface, and inhibiting the proliferation of pathogens. However, in the imbalance of immune barriers, the normal microbiota can become pathogenic and lead to infection, acting as an opportunistic agent. The present study aims to demonstrate the antimicrobial effect of platelet-rich plasma (PRP), its time of action, and its correlation with the concentration of its same components in vitro on Staphylococcus sciuri, a bacterium with high prevalence in the normal ocular microbiota of horses in the municipality of Minas Gerais. For the preparation of the PRP, eight adult Quarter Horse (QH) horses were used. The individual PRP was prepared by the double centrifugation protocol, and then, the PRPs were added to a pool, followed by testing their interaction in culture with Brain Heart Infusion (BHI) broth at different dilutions against five strains collected from different animals. After 3, 6, 12, and 18 hours, the colony formation units (CFU) count on a 5% horse blood agar plate was evaluated for each time point. Our study showed that Staphylococcus sciuri, the resident microorganism of the ocular conjunctival microbiota of horses, is more susceptible when compared to the standard strain "American Type Culture Collection" (ATCC-29213) Staphylococcus aureus, a pathogenic microorganism, which was used for the validation of our study. The antibacterial effect shown in this study was bacteriostatic for up to 6 hours. The most concentrated PRP dilutions, 1 : 1 and 1 : 2, were also most effective, suggesting that the antibacterial effect is volume dependent.

Intranasal Fentanyl to Reduce Pain and Improve Oral Intake in the Management of Children With Painful Infectious Mouth Lesions.

OBJECTIVES: Painful infectious mouth conditions such as herpangina, hand-foot-and-mouth disease, and herpetic gingivostomatitis can cause pain, dehydration, and hospitalization in young children. Treatment for these conditions is generally supportive and directed toward pain relief from ulcerative lesions, thus facilitating oral intake, and preventing dehydration. Attempts at oral therapy at home and in the emergency department are often refused and immediately spit back out. This study evaluated the efficacy of intranasal fentanyl (INF) compared with a commonly used oral (PO) acetaminophen/hydrocodone formulation for the treatment of children with painful infectious mouth conditions. METHODS: This study was a prospective, nonblinded, randomized controlled noninferiority trial conducted in an academic tertiary care pediatric emergency department. The study enrolled children between the ages of 6 months and 18 years with painful infectious mouth lesions and poor oral intake. Patients were randomized to receive either INF (1.5 µg/kg, intervention) or PO acetaminophen/hydrocodone (0.15 mg/kg, control) based on the dose of hydrocodone. The primary outcome was volume of fluid intake per body weight (in milliliters per kilogram) 60 minutes after analgesic administration. Secondary outcomes included pain scores using a validated visual assessment scale (VAS; 1, no pain; 10, worst pain), hydration score (VAS; 1, well hydrated; 4, very dehydrated), admission rate and overall satisfaction score (VAS; 1, worst; 7, best). A priori power analysis indicated that 34 patients would achieve an 81% power with an α value of 0.05. RESULTS: Of the 34 patients enrolled, 17 were randomized to INF and 17 to PO. The demographics between both groups were similar in age, weight, sex, and race. There were no significant differences in parental perception of pain ( P = 0.69) or hydration status ( P = 0.78). Oral fluid intake at 60 minutes was 20 mL/kg for INF versus 18 mL/kg for PO ( P = 0.53). Pain scores at 15 and 30 minutes were 1.7 versus 2.9 ( P = 0.09) and 0.6 versus 1.6 ( P = 0.59). Parental perceptions of pain and hydration status at 60 minutes were 2.2 versus 2.4 ( P = 0.77) and 1.7 versus 1.5 ( P = 0.37). Overall parental satisfaction was 6.4 for INF versus 6.5 for PO ( P = 0.71), and admission rate was 0 vs 12% ( P = 0.49). There were no adverse events such as respiratory, cardiac, or central nervous system depression in either group. CONCLUSIONS: Intranasal fentanyl seems to be a safe and effective alternative to acetaminophen with hydrocodone in reducing pain and improving hydration status in children with painful infectious mouth lesions and poor oral intake.

[High frequency of endoluminal thrombus in patients with ischaemic stroke following COVID-19]. / Alta Frecuencia de Trombo Endoluminal en pacientes con ictus isquémico tras la infección por Coronavirus 2019.

BACKGROUND: Ischaemic stroke may be a major complication of SARS-CoV-2 infection.Studying and characterising the different aetiological subtypes, clinical characteristics, and functional outcomes may be valuable in guiding patient selection for optimal management and treatment. METHODS: Data were collected retrospectively on consecutive patients with COVID-19 who developed acute focal brain ischaemia (between 1 March and 19 April 2020) at a tertiary university hospital in Madrid (Spain). RESULTS: During the study period, 1594 patients were diagnosed with COVID-19. We found 22 patients with ischaemic stroke (1.38%), 6 of whom did not meet the inclusion criteria. The remaining 16 patients were included in the study (15 cases of ischaemic stroke and one case of transient ischaemic attack).Median baseline National Institutes of Health Stroke Scale score was 9 (interquartile range: 16), and mean (standard deviation) age was 73 years (12.8). Twelve patients (75%) were men. Mean time from COVID-19 symptom onset to stroke onset was 13 days. Large vessel occlusion was identified in 12 patients (75%).We detected elevated levels of D-dimer in 87.5% of patients and C-reactive protein in 81.2%. The main aetiology was atherothrombotic stroke (9 patients, 56.3%), with the predominant subtype being endoluminal thrombus (5 patients, 31.2%), involving the internal carotid artery in 4 cases and the aortic arch in one. The mortality rate in our series was 44% (7 of 16 patients). CONCLUSIONS: In patients with COVID-19, the most frequent stroke aetiology was atherothrombosis, with a high proportion of endoluminal thrombus (31.2% of patients). Our clinical and laboratory data support COVID-19-associated coagulopathy as a relevant pathophysiological mechanism for ischaemic stroke in these patients.