Video Experimental Relacionado
Updated: May 27, 2026
09:09
A Method for Targeted 16S Sequencing of Human Milk Samples
Published on: March 23, 2018
10.3K
La microbiota fecal de las vacas Holstein lactantes: un metanálisis que destaca los perfiles microbianos clave y los
Lisa Arnalot1, Géraldine Pascal2, Sébastien Dejean3
1Ecole d'Ingénieurs de Purpan, Université de Toulouse, 31076 Toulouse, France; GenPhySE, Université de Toulouse, INRAE, ENVT, 31326 Castanet-Tolosan, France.
Journal of dairy science
|February 22, 2026
Resumen
Este estudio analizó la microbiota fecal de las vacas lecheras, identificando un grupo central de 21 familias bacterianas. Esta investigación mejora la comprensión de la salud intestinal del ganado y la producción a través de un metanálisis integral.
Área de la Ciencia:
- Microbiología veterinaria y microbiología veterinaria.
- Ciencias de los animales Ciencias de los animales.
- Investigación del microbioma intestinal Investigación del microbioma intestinal.
Sus antecedentes:
- La microbiota digestiva en el ganado, particularmente fuera del rumen, sigue siendo poco estudiada.
- La microbiota intestinal influye significativamente en la fisiología animal, la salud y la productividad.
Objetivo del estudio:
- Para llevar a cabo un metanálisis exhaustivo de la microbiota fecal en las vacas lecheras Holstein lactantes.
- Para identificar el núcleo de la microbiota fecal y perfiles microbianos distintos en las vacas lecheras.
Principales métodos:
- Búsqueda sistemática de PubMed en la literatura para encontrar estudios relevantes.
- Adquisición y análisis de datos de secuenciación de genes de ARNr 16S (región V3-V4) de más de 2.000 muestras fecales.
- Aplicación del análisis multigrupo para identificar perfiles de microbiota, corrigiendo los efectos específicos del estudio.
Principales resultados:
- Identificación de un núcleo de microbiota fecal que comprende 21 familias bacterianas dominantes, que representan el 82% de la abundancia relativa.
- Descubrimiento de 3 perfiles distintos de microbiota fecal en vacas lecheras lactantes.
- Validación del metanálisis como un método robusto para hallazgos confiables y generalizables del microbioma.
Conclusiones:
- La microbiota fecal de las vacas lecheras se caracteriza por un grupo central consistente de bacterias.
- Existen perfiles microbianos distintos dentro de la población de vacas lecheras, potencialmente relacionados con la salud y la producción.
- El metanálisis proporciona un enfoque confiable para consolidar la investigación del microbioma y superar la variabilidad experimental.
Videos de Conceptos Relacionados
01:27Microbes in the Production of Fermented Foods
Lactic acid bacteria (LAB) and molds are instrumental in fermenting plant-based foods to enhance preservation and ensure year-round availability. These microbial processes convert plant carbohydrates into organic acids and other metabolites that inhibit spoilage organisms and contribute to the sensory qualities of the final product.In sauerkraut production, cabbage goes through a microbial succession that starts with cocci such as Leuconostoc mesenteroides. These microbes begin fermentation by...
01:22Introduction to the Human Microbiota
Microorganisms colonize various regions of the human body, including the mouth, nasal passages, throat, stomach, intestines, urogenital tract, and skin. The total number of microbial cells is estimated to range from 10¹³ to 10¹⁴—comparable to, or exceeding, the number of human somatic cells. This host–microbiome relationship has led to the conceptualization of humans as supraorganisms, wherein microbial communities perform vital roles in development, immunity, and disease...
01:30Development of Human Microbiota
The human microbiota begins developing at birth and undergoes continual change as we age. Infancy marks a critical period of microbial sensitivity, offering a “window of opportunity” during which beneficial microbes help mature the immune system. By age three, children typically develop a more stable and diverse microbial community. Newborns acquire microbes from their immediate environment; vaginal delivery favors maternal vaginal microbes, while cesarean births favor microbes from the skin...
01:28Development of the Oral Microbiota
The establishment of the oral microbiome begins before birth, challenging the long-held belief that the fetal oral cavity is sterile. The presence of oral microbes such as Streptococcus and Fusobacterium in amniotic fluid suggests that microbial exposure may occur in utero, potentially through translocation from the maternal oral or gastrointestinal tract. This early colonization primes the neonatal immune system and sets the stage for subsequent microbial succession. Maternal health,...
01:27Microbiota of the Large Intestine
The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...
01:28Microbiota of the Urogenital Tract
The human urogenital system, once thought to be sterile in healthy individuals, is now recognized as a complex microbial habitat. Advancements in molecular sequencing techniques have revealed that even in healthy adults, the kidneys and bladder harbor microbial populations similar to those found in the distal urethra, albeit in much lower abundance. These resident microorganisms, while generally innocuous, can become opportunistic pathogens under conditions that alter the urogenital...