Objective. To determine the sociodemographic, obstetric, and pathological risk factors in preterm delivery of adolescent pregnant women in a hospital in the Junin region, Peru. Materials and Methods. Clinical records of 67 pregnant women and 134 controls between 10 and 19 years of age with a diagnosis of preterm delivery attended from January to December 2022 were reviewed. Bivariate and multiple logistic regression analysis was performed, as well as chi-square analysis with a significance of 0.05. Results. A positive, direct (OR>1) and significant (p<0.05) relationship was determined with the occurrence of preterm birth for the risk variables and multiple regression: Age 10-14 years (OR: 17.162; 95%CI: 1.665 - 176.925; reference "15-19 years"), housewife occupation (OR: 6.056; 95%CI: 2.699 - 13.587; reference "other occupations"), number of Pre-Natal Birth Controls (PNC) less than...

The association of gastrointestinal parasitism with body weight, haematocrit and the FAMACHA method was determined in Junín sheep (lambs and rams) from the Stud group of SAIS Túpac Amaru Ltda. No. 1, Junín Region, Peru. The study was carried out in two seasons: May (dry) and October (rainy). In total, 109 rams and 98 lambs were sampled in May and 89 rams and 85 lambs in October 2018. There was a negative correlation between the haematocrit and the transformed value of parasite load. All the animals were positive to gastrointestinal parasites, finding a higher parasite load in males in October and in May in females. In May there were more cases of animals resistant to parasitism than in October. The highest frequency of gastrointestinal parasites was Nematodirus (50%), followed by Trichostrongylus (25%) and Ostertagia (15%).

El estudio tuvo como propósito evaluar la prevalencia serológica de brucelosis en carneros Junín. El estudio se desarrolló en la Unidad de Producción Consac de la SAIS Túpac Amaru Ltda. N.° 01. Se utilizaron 200 carneros seleccionados por clase (SUPER ++, SUPER + ½, SUPER +, SUPER). Se tomaron muestras de sangre y los sueros se analizaron con kits IDEXX Brucella ovis Ab Test. Para la interpretación de los resultados se empleó un punto de corte de vigilancia (relación S/P=45%). El 20, 32, 28 y 34% de la categoría SUPER +, SUPER + ½, SUPER + y SUPER fueron positivos a brucelosis, respectivamente. El área bajo la curva ROC fue de 0.57. Los resultados del Odds Ratio fueron bajos y sin significancia estadística, lo que indica que otros factores extrínsecos podrían estar incidiendo en la prevalencia sostenida de la brucelosis.

Rice (Oryza sativa L) is an important source of essential elements but also can contain high As concentrations, which may be consumed and causes health effects. This work aimed to contribute to the lack of information quantifying the total arsenic (tAs) in 31 domestic rice (white rice, n=19; brown rice, n=7; parboiled rice, n=5) of different brands purchased in Peruvian markets. The tAs content was conducted by ICP-MS. The tAs concentration was compared to the maximum limits prescribed by regulatory agencies. Dietary intake (DI), dietary exposure (DE), and margin of exposure (MOE) were estimated. tAs concentration in white, brown and parboiled rice were 0.292 ± 0.106 mg/kg, 0.401 ± 0.081 mg/kg, 0.229 ± 0.03 mg/kg, respectively. Arsenic concentration in white rice exceeded limits recommended by FAO/WHO (0.20 mg kg-1), and European legislation (0.25 mg kg-1), but no Mercosul limits (0.3...

The objective of this study was to evaluate the human health risk associated with PM2.5 exposure in residents of the Metropolitan area of Lima (MAL), Peru, for a best-case scenario and a worst-case scenario based on the monthly average of PM2.5 and 90th percentile of PM2.5 concentration, respectively. Hourly concentrations of PM2.5 between 2014 and 2023 corresponding to five monitoring stations were provided by the National Meteorology and Hydrology Service (SENAMHI). Air quality was assessed using the air quality index (AQI). The hazard quotient to evaluate the risk to human health was calculated using the annual limit value established by the European Union (EU, 25 µg/m3 ) and World Health Organization (WHO, 10 µg/m3 ) because there is no toxicity value for PM2.5. Annual average PM2.5 concentration ranged from 19.5 µg/m3 to 35.8 µg/m3 with some years below the annual limit establis...

Rice (Oryza sativa L) is an important source of essential elements but also can contain high As concentrations, which may be consumed and causes health effects. This work aimed to contribute to the lack of information quantifying the total arsenic (tAs) in 31 domestic rice (white rice, n=19; brown rice, n=7; parboiled rice, n=5) of different brands purchased in Peruvian markets. The tAs content was conducted by ICP-MS. The tAs concentration was compared to the maximum limits prescribed by regulatory agencies. Dietary intake (DI), dietary exposure (DE), and margin of exposure (MOE) were estimated. tAs concentration in white, brown and parboiled rice were 0.292 ± 0.106 mg/kg, 0.401 ± 0.081 mg/kg, 0.229 ± 0.03 mg/kg, respectively. Arsenic concentration in white rice exceeded limits recommended by FAO/WHO (0.20 mg kg-1), and European legislation (0.25 mg kg-1), but no Mercosul limits (0.3...

Rice (Oryza sativa L) is an important source of essential elements but also can contain high As concentrations, which may be consumed and causes health effects. This work aimed to contribute to the lack of information quantifying the total arsenic (tAs) in 31 domestic rice (white rice, n=19; brown rice, n=7; parboiled rice, n=5) of different brands purchased in Peruvian markets. The tAs content was conducted by ICP-MS. The tAs concentration was compared to the maximum limits prescribed by regulatory agencies. Dietary intake (DI), dietary exposure (DE), and margin of exposure (MOE) were estimated. tAs concentration in white, brown and parboiled rice were 0.292 ± 0.106 mg/kg, 0.401 ± 0.081 mg/kg, 0.229 ± 0.03 mg/kg, respectively. Arsenic concentration in white rice exceeded limits recommended by FAO/WHO (0.20 mg kg-1), and European legislation (0.25 mg kg-1), but no Mercosul limits (0.3...

This work aimed to analyze the temporal behavior of the concentration profiles of PM2.5 (period 2014-2023) and PM10 (period 2010-2023) collected in five districts of the metropolitan area of Lima (MAL). The year 2016 and 2021 showed the highest annual averages for PM2.5 while PM10 reported higher concentrations in 2013, 2016, and 2021 for most stations. For PM2.5 higher peaks were recorded between May and September and lower peaks between January and March. For PM10, higher peaks were found in March-May and August-October, and lower peaks were observed between January and June. Daily minimum and maximum values of PM2.5 ranged between 3.74 and 148 μg/m3 , while PM10 ranged from 7.16 to 579 μg/m3 , respectively. For hourly variations were observed peaks that occur between 6:00 and 10:00 a.m. and between 6:00 p.m. and 11:00 p.m. for both PMs. The information obtained will help to identify...

The objective of this research was to predict the live weight of Corriedale lambs using morphological measurements and machine learning algorithms. A total of 291 five-month-old lambs from the Corpacancha Production Unit of SAIS PACHACÚTEC SAC were used. These animals represented a homogeneous group in terms of age, sex, and genetics, as they belonged to the Corriedale breed and were offspring of "Category A" ewes. Morphological measurements recorded included Body Length (BL), Withers Height (WH), Thoracic Girth (TG), Rump Width (RW), Abdominal Girth (AG), Cannon Bone Length (CBL), Chest Depth (CD), and Live Weight (LW). The models evaluated were Multiple Linear Regression, Ridge Regression, Decision Trees, Random Forest, and XGBoost. The comparative analysis of the machine learning models identified ModG and Ridge as the most accurate and stable options, standing out for their low Mean...