Publications by authors named "Johanna Martins-Luna"

Objetive: this study was to determine the relationship between acute febrile illness and bacterial pathogens with zoonotic potential that cause emerging and re-emerging diseases in a central-eastern region of Peru.

Results: Out of the 279 samples analyzed, 23 (8.2%) tested positive for infection by Rickettsia spp.

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has been described as a cause of serious community-acquired infections in tropical countries. Currently, its implications when simultaneously identified with other pathogens are not yet adequately understood. A descriptive study was conducted on hospitalized patients with a diagnosis of moderate/severe SARS-CoV-2-induced pneumonia confirmed via real-time RT-PCR.

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The addition of Biofire FilmArray Blood Culture Identification panel 2 (BCID2) to the antimicrobial stewardship program (ASP) could improve outcomes in bloodstream infections (BSI) of patients with febrile neutropenia (FN). A pre- and post-quasi-experimental single-center study was conducted at a reference hospital in Peru. Three groups were considered: patients with BSI before ASP intervention (control group), patients with BSI after ASP intervention (group 1), and patients with BSI after ASP intervention plus BCID2 PCR Panel implementation (group 2).

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  • The study aimed to assess how common sexually transmitted infections (STIs) are among asymptomatic women with human papillomavirus (HPV) in Cajamarca, Peru, and to identify related risk factors.
  • Researchers conducted a cross-sectional study involving 842 women, finding that nearly 24% had HPV, with a significant majority carrying high-risk strains.
  • The findings revealed associations between HPV types and various factors like the number of sexual partners and histories of sexual abuse, emphasizing the need for increased monitoring and intervention to address the high prevalence of these infections.
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  • The study investigates a new rapid test for detecting dengue virus, highlighting its effectiveness during the early days of infection and its ability to distinguish dengue from similar diseases like Zika.
  • The evaluation included 286 serum samples from patients in endemic regions of Peru, comparing results from the rapid test to the traditional ELISA method, with decent sensitivity and high specificity noted.
  • The findings advocate for the rapid test's use in primary care settings to enhance early diagnosis and improve public health responses in areas lacking advanced diagnostic resources.
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Background: Oropouche fever is an infectious disease caused by the Oropouche virus (OROV). The diagnosis and prediction of the clinical picture continue to be a great challenge for clinicians who manage patients with acute febrile syndrome. Several symptoms have been associated with OROV virus infection in patients with febrile syndrome; however, to date, there is no clinical prediction rule, which is a fundamental tool to help the approach of this infectious disease.

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Introduction: Human rhinovirus is a major cause of acute respiratory infections (ARIs) worldwide. Epidemiological data on human rhinovirus (RV) in Peru is still scarce, as well as its role in respiratory infections in children. Therefore, the aim of this study was to describe the prevalence of rhinovirus and to identify the circulating species in nasopharyngeal swabs from children with acute respiratory infections.

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  • * A total of 464 febrile patients were analyzed, with over 40% testing positive for one pathogen; the most common was SARS-CoV-2 IgM (73.40%), while co-infections primarily involved DENV and SARS-CoV-2.
  • * Findings suggest that SARS-CoV-2 should be considered in acute febrile illness cases in regions where arboviral diseases are common, highlighting the potential for co-infections and the need for
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  • A study conducted in Peru compared inflammatory responses in COVID-19 patients living at different altitudes (Lima vs. Huaraz) to understand how altitude affects inflammation.
  • Results showed significantly higher levels of proinflammatory cytokines IL-6 and TNF-α in COVID-19 patients from Huaraz (high altitude) compared to those from Lima (sea level).
  • The findings suggest that altitude may influence inflammation in COVID-19, indicating a need for further research to deepen understanding and improve treatment strategies.
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The impact of respiratory coinfections in COVID-19 is still not well understood despite the growing evidence that consider coinfections greater than expected. A total of 295 patients older than 18 years of age, hospitalized with a confirmed diagnosis of moderate/severe pneumonia due to SARS-CoV-2 infection (according to definitions established by the Ministry of Health of Peru) were enrolled during the study period. A coinfection with one or more respiratory pathogens was detected in 154 (52.

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Low- and middle-income countries (LMICs) are significantly affected by SARS-CoV-2, partially due to their limited capacity for local production and implementation of molecular testing. Here, we provide detailed methods and validation of a molecular toolkit that can be readily produced and deployed using laboratory equipment available in LMICs. Our results show that lab-scale production of enzymes and nucleic acids can supply over 50,000 tests per production batch.

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Objective: This study was carried out to determine the prevalence of leptospirosis among febrile patients with a suspicious clinical diagnosis of dengue fever in northern Peru.

Results: A total of 276 serum samples from patients with acute febrile illness (AFI) and suspected diagnosis for dengue virus (DENV) were analyzed. We identified an etiological agent in 121 (47.

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Background And Objectives: Pertussis is an infectious disease caused by the Gram-negative bacterium In Peru, actual public health programs indicate that vaccination against must be mandatory and generalized, besides all detected cases must be reported. The objective of this study was to determine the prevalence of among children under five years of age with a presumptive diagnosis of whopping cough in Cajamarca, a region located in northern Peru.

Materials And Methods: The population of this cross-sectional study were children under 5 years old hospitalized as presumptive cases of pertussis during December 2017 to December 2018.

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Objective: To describe frequency and clinical characteristics of MAYV infection in Piura, as well as the association of this pathogen with DENV.

Results: A total of 86/496 (17.3%) cases of MAYV were detected, of which 54 were MAYV mono-infection and 32 were co-infection with DENV, accounting for 10.

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Objective: To characterize the cervicovaginal microbiota of HPV-positive and HPV-negative asymptomatic Peruvian women, by identifying the presence of 13 representative bacteria genus.

Results: A total of 100 HPV-positive and 100 HPV-negative women were matched by age for comparison of microbiota. The following bacteria were more frequently identified in HPV-positive patients compared to HPV-negative: Eubacterium (68 vs 32%), Actinobacteria (46 vs 33%), Fusobacterium (11 vs 6%) and Bacteroides (20 vs 13%).

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Objective: To describe the prevalence of dengue virus serotypes, as well as other viral and bacterial pathogens that cause acute febrile illness during an outbreak in Cajamarca in 2016.

Results: Dengue virus (DENV) was the most frequent etiologic agent detected in 25.8% of samples (32/124), followed by Rickettsia spp.

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Objective: To evaluate the frequency of infection caused by the Oropouche virus (OROV) in 496 patients with acute febrile disease (AFI), whose samples were obtained for the analysis of endemic arboviruses in a previous investigation carried out in 2016.

Results: OROV was detected in 26.4% (131/496) of serum samples from patients with AFI.

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Introduction: Oropouche fever is an under-reported and emerging infectious disease caused by Oropouche virus (OROV). Its incidence is under-estimated mainly due to clinical similarities with other endemic arboviral diseases and the lack of specific diagnostic tests. We report the first outbreak of Oropouche fever in a western region of the Peruvian Amazon in Huanuco, Peru.

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Background: Acute respiratory infections (ARIs) represent an important cause of morbidity and mortality in children, remaining a major public health concern, especially affecting children under 5 years old from low-income countries. Unfortunately, information regarding their epidemiology is still limited in Peru.

Methods: A secondary data analysis was performed from a previous cross-sectional study conducted in children with a probable diagnosis of Pertussis from January 2010 to July 2012.

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Background: Huánuco is a central eastern region of Peru whose geography includes high forest and low jungle, as well as a mountain range that constitutes the inter-Andean valleys. It is considered a region endemic for dengue due to the many favorable conditions that facilitate transmission of the virus.

Methods: A total of 268 serum samples from patients in Huánuco, Peru with an acute febrile illness were assessed for the presence of dengue virus (DENV) via RT-PCR and NS1, IgM, and IgG ELISA during December 2015 and March 2016.

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Objective: Describe the prevalence of Bordetella pertussis via PCR in children under 5 years old hospitalized as probable cases of pertussis and report the most common clinical features among them.

Results: A positive PCR result for B. pertussis was observed in 20.

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Objective: To assess the presence of Dengue, Chikungunya, and Zika in serum samples of patients with acute febrile illness in Piura, Peru and describe the most common clinical features.

Results: Dengue was the most common arbovirus detected in 170/496 (34.3%), followed by Zika in 39/496 (7.

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