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Third doses of mRNA COVID-19 vaccines induced a significant increase in neutralizing potency and breadth in naive individuals comparable with convalescents who restored levels after the first two doses. These results suggest a limit to elicit neutralization in the number of stimuli by infection or vaccination with ancestral SARS-CoV-2 sequences

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Using a polyclonal approach of equine anti-SARS-CoV-2 F(ab)2 antibodies we have achieved a high level of neutralizing potency against all SARS-CoV-2 variants tested. Neutralization titers were in the range of 105-106 IU/mL including Omicron: 111,403 UI/mL, which is 2-3 orders of magnitude what is normally achieved in response to SARS-CoV-2 infection and/or vaccination. The presence of high titers of a repertoire of antibodies targeting conserved epitopes in different regions of the spike protein could plausibly account for this remarkable breadth of neutralization. These results warrant the clinical investigation of anti-SARS-CoV-2 equine polyclonal F(ab)2 antibodies as a novel therapeutic strategy against COVID-19

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The efficient spread of SARS-CoV-2 resulted in a pandemic that is unique in modern history. Despite early identification of ACE2 as the receptor for viral spike protein, much remains to be understood about the molecular events behind viral dissemination. We evaluated the contribution of C-type lectin receptors (CLRS) of antigen-presenting cells, widely present in air mucosa and lung tissue. DC-SIGN, L-SIGN, Langerin and MGL bind to diverse glycans of the spike using multiple interaction areas. Using pseudovirus and cells derived from monocytes or T-lymphocytes, we demonstrate that while virus capture by the CLRs examined does not allow direct cell infection, DC/L-SIGN, among these receptors, promote virus transfer to permissive ACE2+ cells. A glycomimetic compound designed against DC-SIGN, enable inhibition of this process. Thus, we described a mechanism potentiating viral capture and spreading of infection. Early involvement of APCs opens new avenues for understanding and treating the imbalanced innate immune response observed in COVID-19 pathogenesis

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BackgroundThe diagnosis of SARS-CoV-2 infection is based on viral RNA detection by real-time RT-PCR (rRT-PCR) in respiratory samples. This detection can remain positive for weeks without implying virus viability. MethodsWe have performed cell culture to assess viral replication in 106 respiratory samples rRT-PCR positive for SARS-CoV-2 from 105 patients with COVID-19. Fifty were samples from 50 patients with mild forms of COVID-19 who did not require hospital admission. Fifty-six samples were obtained from 55 hospitalized patients with severe pneumonia. Samples were obtained at different time points covering the time from clinical diagnosis to the follow up during hospital care. ResultsIn 49 samples (49/106, 46.2%) a cytopathic effect (CPE) was detected in cell culture. Our study demonstrates that while in patients with mild COVID-19, viral viability is maintained in fact up to 10 days in patients with severe COVID-19 the virus can remain viable for up to 32 days after the onset of symptoms. Patients with severe COVID-19 as compared with mild cases, presented infective virus in a significantly higher proportion in samples with moderate or low viral load (Ct value > 26): 22/46 (47.8%) versus 7/38 (18.4%), (p <0.01), respectively. ConclusionsPersistent SARS-CoV-2 replication could be demonstrated in severe COVID-19 cases for periods up to 32 days after the onset of symptoms and even at high Ct values. COVID-19 severity is a more determining factor for viral viability than the time elapsed since the onset of symptoms or the Ct value obtained in the RT-PCR assay.

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BackgroundOn January 31st the first case of COVID-19 was detected in Spain, an imported case from Germany in Canary Islands, and thereafter on February 25th the first case was detected in Madrid. The first case of COVID-19 was confirmed at the Hospital Universitario 12 de Octubre on March 1st, a large public hospital with 1200 beds, covering an area over 400000 inhabitants in southern Madrid. During March 2020 highly active circulation of SARS-CoV-2 was experienced in Madrid with 24090 cases officially reported by March 29th. MethodsSince the beginning of the epidemics the Occupational Health and Safety Service (OHSS) organized the consulting and testing of the hospital personnel with confirmed exposure and also those presenting symptoms suggestive of viral respiratory infection. For molecular diagnosis of SARS-CoV-2 infection both nasopharyngeal and oropharyngeal swabs were obtained from suspected cases and processed at the Microbiology Laboratory by automatized specific PCR methods that was operative from February 25th as part of the preparedness. ResultsFrom a total of 6800 employees of the hospital, 2085 (30,6 %) were tested during the period 1-29 March 2020, some of them repeatedly (2286 total samples). The first HCW infected was confirmed on March 9th. A total of 791 HCW and personnel were confirmed to be infected by March 29th, representing 38% of those tested and 11,6 % of all the hospital workers. The proportion of infected individuals was estimated among the different groups of occupational exposure and the evolution of the cases during the expansive epidemic wave was compared between HCW and those patients attending at the Emergency Department (ER) during the same period and adjusted by the same age range. There were no statistically significant differences in the proportion of SARS- CoV-2 positive PCR detection between HCW from high risk areas involved in close contact with COVID-19 patients in comparison with clerical, administrative or laboratory personnel without direct contact with patients. The curves of evolution of accumulated cases between patients and HCW during March 2020 showed an almost parallel shape. DiscussionThe recommendation from our OHSS did not include testing of asymptomatic cases but was highly proactive in testing even patients with minor symptoms therefore, a high proportion of HCW and non-sanitary personnel was tested in March 2020 during the rapid period of expansion of the epidemics in Madrid, accounting for a total of 30,6 % of the hospital employees. Most of the COVID-19 cases among the hospital HCW and personnel were mild and managed at home under self-isolation measures, however 23 (3%) required hospitalization mostly due to severe bilateral interstitial pneumonia, two of those cases required mechanical ventilation at the ICU. No fatalities occurred during the study period. Although there were some cases of highly probable transmission from COVID-19 patients to HCWs, mainly at the first phase of the epidemics, there were no significant differences on the infection rates of HCW and hospital personnel that can be related to working in areas of high exposure risk. Furthermore, the evolution of cases during the same time period (March 2020) between patients attending the ER and hospital staff suggests that both groups were driven by the same dynamics. This experience is similar to the communicated from Wuhan verified by the WHO Joint Mission and also from recent experiences at hospital in the Netherlands, where most of the infections of HCW were related to household or community contacts. SignificanceSince the collective of hospital HCW are exhaustively screened in specific centers, their rate of infection for SARS-CoV-2 could be an indicator of the epidemic dynamics in the community. There appears to be a close connection between HCW infection and the driving forces of transmission in the community. Although we cannot exclude an additional risk factor of infection by SARS-CoV-2 due to the fact of the hospital environment, the similar proportions of positive cases among all the areas of the hospital and the evolutive wave of infection, as compared with the community, are clear arguments against a major factor of occupational risk. Exhaustive testing, such as the one carried out in our institution, covering over one third of all the workers, could be used as a reference of the population infected in the community. Since a significant proportion of COVID-19 cases can be asymptomatic and not all the hospital employees were actually tested, it is highly likely that this 11,6 % is a minimum estimation of the impact of SARS-CoV-2 circulation in Madrid during the first 4 weeks of the epidemics. This is in high and clear contrast with the official figures circulating at national and international levels. This has important implications to more precisely estimate the actual number of cases in the community and to develop public health policies for containment, treatment and recovery.

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Recently, the olive oil industry has been the subject of harsh criticism for false labeling and even adulterating olive oils. This situation in which both the industry and the population are affected leads to an urgent need to increase controls to avoid fraudulent activities around this precious product. The aim of this work is to propose a new analytical platform by coupling electrospray ionization (ESI), differential mobility analysis (DMA), and mass spectrometry (MS) for the analysis of olive oils based on the information obtained from the chemical fingerprint (nontargeted analyses). Regarding the sample preparation, two approaches were proposed: (i) sample dilution and (ii) liquid-liquid extraction (LLE). To demonstrate the feasibility of the method, 30 olive oil samples in 3 different categories were analyzed, using 21 of them to elaborate the classification model and the remaining 9 to test it (blind samples). To develop the prediction model, principal component analysis (PCA) and orthogonal partial least-squares discriminant analysis (OPLS-DA) were used. The overall success rate of the classification to differentiate among extra virgin olive oil (EVOO), virgin olive oil (VOO), and lampante olive oil (LOO) was 89% for the LLE samples and 67% for the diluted samples. However, combining both methods, the ability to differentiate EVOO from lower-quality oils (VOO and LOO) and the edible oils (EVOO and VOO) from nonedible oil (LOO) was 100%. The results show that ESI-DMA-MS can become an effective tool for the olive oil sector.

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Aggressive fibromatosis comprises connective tissue tumours that represent 0.03% of all bodily neoplasms, occurring more often in the abdominal wall, mesentery, and extremities; its location in the breast constitutes a very infrequent type of lesion. Its pathogenesis is diverse and its relationship with augmentation mastoplasty is still unclear. Four cases of aggressive breast fibromatosis following augmentation mastoplasty are reported in this article.

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Duodenal adenocarcinoma (ADC) represents only 0.3% of gastrointestinal neoplasms. With the frequency being higher between the ages of 40 and 60, it is predominantly located in the second part of the duodenum and around the periampullary region. Symptoms are nonspecific, so the majority of patients present with advanced disease. Neoadjuvant chemotherapy is a therapeutic option that has not been well studied. The global literature includes only isolated reports on this subject. This is why we are presenting the following case: a 60-year-old female patient with a locally advanced, inoperable duodenal ADC received neoadjuvant chemotherapy. Having presented a favourable response as observed in the post-neoadjuvant extension studies, a pancreaticoduodenectomy was performed without any perioperative complications and with satisfactory progress. The final biopsy reported a complete pathological response. After being monitored for 34 months, the patient was free from locoregional and distant metastatic disease. During the last weeks of monitoring, she developed a second primary breast tumour, which has been corroborated by immunohistochemistry.

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OBJECTIVES: The objective of this study is to compare tissue reduction following papilla-sparing and sulcular incisions in oral surgical indications. MATERIAL AND METHODS: Five beagle dogs were used. Three months after tooth extraction of P2-M1, notches were prepared at the height of the interproximal gingiva into M2 and P1. Papilla-sparing and sulcular incisions were randomly performed, full-thickness flaps elevated and flaps repositioned. Three months postoperatively, tissue reduction was assessed using a digital calliper, mean values were calculated per group and analysed using a Wilcoxon matched-pair rank test. RESULTS: Papilla-sparing incisions revealed significantly less (p < 0.05) tissue reduction than sulcular incision techniques. CONCLUSION: Papilla-sparing incisions seem to induce less tissue response following flap surgery compared to sulcular incisions in oral surgical indications. Nevertheless, tissue reduction was seen in both groups. CLINICAL RELEVANCE: For surgical approaches without the necessity of direct access to the root surface (i.e., implantology, oral surgery), papilla-sparing incisions may be superior compared to sulcular incisions.

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Introduction: The maturation process of peloids has been the subject of many studies over time. Knowledge of the processes occurring during this time period, it is very interesting to know the applications of the final product. Material and Method: For preparation of extemporaneous peloids it has been used clay Bentonite Volcangel (Benesa) supplied by Süd Chemie, a mineral water hyperthermal (42°C), sulphurated, weak mineralization (261 mg/l) from Baños Montemayor (M) and water purified obtained by distillation and ion exchange (A).   Peloids were prepared by mixing in the ratio needed aiming to produce a product with 70% water and clay, in polymeric material containers. Water and clay were mixed slowly until total homogenization. The product was introduced into glass containers tightly closed and kept at a constant temperature of 42°C and 8°C.   The percentage of the solid components, water and ashes was determined by gravimetric techniques, drying the sample in oven and muffle furnace (850°C). The specific heat and calorific retentivity were calculated from these data.   　Every six weeks, the analysis of all parameters are repeated in samples maintained at 42°C and 8°C to study possible variations. Results: In Table 1 are shown values of the parameters of the initial peloids prepared with purified water and mineromedicinal water. Conclusion: There were no significant differences observed in the values of the analyzed parameters between the two initial peloids prepared with purified water and with medicinal mineral water of Montemayor spa and a slight diminution in the water percentage, and a small increase of the relaxation time six weeks later.

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<b>Introduction: </b>The maturation process of peloids has been the subject of many studies over time. Knowledge of the processes occurring during this time period, it is very interesting to know the applications of the final product.<BR><b>Material and Method: </b>For preparation of extemporaneous peloids it has been used clay Bentonite Volcangel (Benesa) supplied by Süd Chemie, a mineral water hyperthermal (42°C), sulphurated, weak mineralization (261 mg/l) from Baños Montemayor (M) and water purified obtained by distillation and ion exchange (A).<BR>  Peloids were prepared by mixing in the ratio needed aiming to produce a product with 70% water and clay, in polymeric material containers. Water and clay were mixed slowly until total homogenization. The product was introduced into glass containers tightly closed and kept at a constant temperature of 42°C and 8°C.<BR>  The percentage of the solid components, water and ashes was determined by gravimetric techniques, drying the sample in oven and muffle furnace (850°C). The specific heat and calorific retentivity were calculated from these data.<BR>  　Every six weeks, the analysis of all parameters are repeated in samples maintained at 42°C and 8°C to study possible variations.<BR><b>Results: </b>In Table 1 are shown values of the parameters of the initial peloids prepared with purified water and mineromedicinal water.<BR><b>Conclusion:</b> There were no significant differences observed in the values of the analyzed parameters between the two initial peloids prepared with purified water and with medicinal mineral water of Montemayor spa and a slight diminution in the water percentage, and a small increase of the relaxation time six weeks later.

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El Carcinoma Basocelular, (CBC), constituye el tumor epitelial maligno más frecuente de la piel; su etiología está muy asociada con la exposición a los rayos solares, por lo cual las personas de piel blanca y ojos claros son las más afectadas. Este tumor se caracteriza por su destrucción local, no así por su metástasis. Se describe una distribución similar en la zona bucomaxilofacial e incluso variantes intrabucales que, para muchos autores, no son más que Carcinomas ameloblásticos. El diagnóstico clínico, a veces, se hace difícil puesto que puede confundirse con otras entidades de la piel, por lo cual nos propusimos realizar un estudio transversal de las solicitudes e informes de biopsia, recibidos en el Departamento de Anatomía Patológica de la Facultad de Estomatología,en el período 1999-2004, con el diagnóstico de CBC clínica y/o histológicamente. Se leccionaon una muestra de 204 pacientes afectados;encontramos que la mayoría integraba el grupo entre los 71-80 años de edad; predominó el sexo masculino; la localización más frecuente fue en la nariz (47,4(por ciento), todo lo cual se comparó con lo reportado en la literatura actual. Predominó el tipo sólido dentro de las variantes histológicas y hubo una correlación de los diagnósticos clínicos con los histológicos de90,2(por ciento)

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