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Updated: Sep 29, 2026

Mouse Model of Surgically-induced Endometriosis by Auto-transplantation of Uterine Tissue
Published on: January 6, 2012
Endometriosis is associated with an altered profile of intestinal microflora in female rhesus monkeys
Michael T Bailey1, Christopher L Coe
1University of Wisconsin, Harlow Center for Biological Psychology, 22 N. Charter Street, Madison, WI 53715, USA. mtbailey@students.wisc.edu
Background:
The intestinal microflora provide a strong defence against intestinal pathogens, and may be altered in inflammatory conditions that impact the gut, such as endometriosis. Therefore, intestinal bacteria shed from rhesus monkeys with endometriosis were compared with age-matched healthy controls. A second study assessed the prevalence of intestinal inflammation in female monkeys to determine whether endometriosis is associated with an increased likelihood of intestinal inflammation.
Methods:
Differential and selective agars were used to enumerate total and Gram-negative aerobic and facultatively anaerobic bacteria, as well as Lactobacilli, from female monkeys with or without endometriosis. In addition, the prevalence of intestinal inflammation in monkeys with or without endometriosis was determined in a retrospective analysis of necropsy reports.
Results:
Monkeys with endometriosis had a significantly different profile of shed microflora. Endometriosis was associated with lower Lactobacilli concentrations and higher Gram-negative bacteria concentrations. Moreover, there was a higher prevalence of intestinal inflammation in monkeys with endometriosis in comparison to healthy controls.
Conclusions:
Endometriosis is associated with an altered profile of intestinal microflora in rhesus monkeys. Although the exact mechanisms linking endometriosis and the microflora are unknown, it is possible that the microflora were affected by endometriosis-associated intestinal inflammation.
Insights
Endometriosis in rhesus monkeys alters intestinal microflora, decreasing beneficial Lactobacilli and increasing Gram-negative bacteria. This condition also correlates with a higher prevalence of intestinal inflammation.
Area of Science:
- Gastroenterology
- Gynecology
- Microbiology
Background:
- The gut microbiome plays a crucial role in intestinal defense.
- Conditions like endometriosis can potentially alter the gut microflora.
- Rhesus monkey models are used to study endometriosis and its systemic effects.
Purpose of the Study:
- To compare the intestinal microflora shed by rhesus monkeys with endometriosis to that of healthy controls.
- To investigate the association between endometriosis and the prevalence of intestinal inflammation in female monkeys.
Main Methods:
- Enumeration of total bacteria, Gram-negative bacteria, and Lactobacilli using differential and selective agars.
- Retrospective analysis of necropsy reports to assess intestinal inflammation prevalence.
Main Results:
- Monkeys with endometriosis exhibited a distinct microflora profile compared to controls.
- Lower concentrations of Lactobacilli and higher concentrations of Gram-negative bacteria were observed in monkeys with endometriosis.
- A higher prevalence of intestinal inflammation was found in monkeys with endometriosis.
Conclusions:
- Endometriosis is linked to significant alterations in the intestinal microflora of rhesus monkeys.
- Endometriosis-associated intestinal inflammation may be a contributing factor to these microflora changes.
- Further research is needed to elucidate the precise mechanisms connecting endometriosis and the gut microbiome.
Related Concept Videos
Oogenesis
Dysbiosis of the Gut Microbiota
Microbiota of the Urogenital Tract
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