Mycoplasma bovis testing for the screening of semen imported into New Zealand

AIMS

To evaluate the fitness of three PCR assays for the detection of Mycoplasma bovis in dilute (extended) bovine semen, and a reverse transcriptase-PCR (RT-PCR) adaptation as a proxy for viability.

MATERIALS AND METHODS

Four commercial kit-based methods for nucleic acid extraction were compared to test for the presence of PCR inhibitors in nucleic acid extracted from undiluted and diluted semen. Then, analytical sensitivity, analytical specificity, and diagnostic specificity of two real-time PCR and one conventional PCR were evaluated for the detection of M. bovis DNA in semen and compared against microbial culture. Furthermore, an RT-PCR was adapted to detect RNA only and tested on viable and non-viable M. bovis to establish its ability to discriminate between the two.

RESULTS

No significant PCR inhibition was detected from the dilute semen. All DNA extraction methods except one were equivalent, regardless of semen dilution. The analytical sensitivity of the real-time PCR assays was estimated as 45.6 cfu per 200 µL semen straw (2.2 × 10² cfu/mL). The conventional PCR was 10 times less sensitive. No cross-reactivity was observed for the real-time PCR for any of the bacteria tested and the diagnostic specificity was estimated as 100 (95% CI = 94.04-100) %. The RT-PCR was poor in distinguishing between viable and non-viable M. bovis. The mean quantification cycle (Cq) values for RNA extracted from different treatments to kill M. bovis remained unchanged 0-48 hours after inactivation.

CONCLUSION AND CLINICAL RELEVANCE

The real-time PCR were fit for the purpose of screening dilute semen for the detection of M. bovis to prevent incursion via importation of infected semen. The real-time PCR assays can be used interchangeably. The RT-PCR could not reliably indicate the viability of M. bovis. Based on the results from this study, a protocol and guidelines have been produced for laboratories elsewhere that wish to test bovine semen for M. bovis.

Prevalence of 'pouch failure' of the ileoanal pouch in ulcerative colitis: a systematic review and meta-analysis

BACKGROUND AND AIMS

The ileoanal pouch (IPAA) provides patients with ulcerative colitis (UC) that have not responded to medical therapy an option to retain bowel continuity and defecate without the need for a long-term stoma. Despite good functional outcomes, some pouches fail, requiring permanent diversion, pouchectomy, or a redo pouch. The incidence of pouch failure ranges between 2 and 15% in the literature. We conducted a systematic review and meta-analysis aiming to define the prevalence of pouch failure in patients with UC who have undergone IPAA using population-based studies.

METHODS

We searched Embase, Embase classic and PubMed from 1978 to 31st of May 2021 to identify cross-sectional studies that reported the prevalence of pouch failure in adults (≥ 18 years of age) who underwent IPAA for UC.

RESULTS

Twenty-six studies comprising 23,389 patients were analysed. With < 5 years of follow-up, the prevalence of pouch failure was 5% (95%CI 3-10%). With ≥ 5 but < 10 years of follow-up, the prevalence was 5% (95%CI 4-7%). This increased to 9% (95%CI 7-16%) with ≥ 10 years of follow-up. The overall prevalence of pouch failure was 6% (95%CI 5-8%).

CONCLUSIONS

The overall prevalence of pouch failure in patients over the age of 18 who have undergone restorative proctocolectomy in UC is 6%. These data are important for counselling patients considering this operation. Importantly, for those patients with UC being considered for a pouch, their disease course has often resulted in both physical and psychological morbidity and hence providing accurate expectations for these patients is vital.

Inflammatory bowel disease in India: challenges and opportunities

Evidence is emerging that inflammatory bowel diseases (IBDs) are becoming increasingly prevalent in developing countries, altering the previously held view that these were diseases of the West. Within this is a substantial increase in the burden of this disease in India, a matter of great importance to the country itself as well as in furthering our understanding of the disease. There is comparatively less data on this, both from the epidemiological standpoint as well as on disease pathogenesis in this particular cohort and is very much a subject matter of evolving understanding and research. This article aims to look at the changing global distribution of the disease and its implications. The Indian disease phenotype, and the aetiology of disease development will also be addressed with particular focus on differing pathogenetic processes in the Indian subpopulation, with consideration of what clues may be offered by the increasing incidence of the disease in this developing nation. Available evidence will be evaluated with the objective of providing a comprehensive overview of the development of IBD in India.

Human immunodeficiency virus (HIV)-related risk-taking behaviors in women attending inner-city prenatal clinics in the mid-west

OBJECTIVE

Federal guidelines recommend the provision of human immunodeficiency virus education to all attendees of prenatal clinics. The current study was conducted to assess risk-taking behaviors among urban women voluntarily pursuing prenatal care.

DESIGN AND SETTING

African American women attending urban prenatal clinics in Cleveland, Ohio were subjected to an extensive interview before receiving an experimental AIDS education curriculum. The interview sought detailed information regarding demographics, lifetime and recent sexual activity, condom use, and lifetime and recent illicit drug use.

RESULTS

A total of 1017 women were interviewed; of those women, approximately 73% were single. The majority had a monthly income of less than $500. A total of 66% had only one partner in the past year, and almost 90% had < or = 1 partner in the past 6 months. A total of 98% identified a main partner. Nearly all subjects were at least fairly certain that this partner did not use intravenous drugs, and 71% were at least fairly certain that he was monogamous. Only 19% used condoms most or all the time. Intravenous drug use among study subjects was very infrequent.

CONCLUSION

These data indicate that inner-city Cleveland women seeking prenatal care are largely monogamous around the time of their gestation, and that a history of intravenous drug use is infrequent. They suggest that prenatal counseling in urban clinics will need to address women who largely are engaged in single-partner relationships at the time of the intervention.

Women's lived experience of conceptualizing the self: implications for health care practice

In this article we describe a unique qualitative research design in which we used our own lived experiences as the basis for understanding theories of the self. Our purpose in this study was to (a) broaden current understandings of self theory, (b) juxtapose theories of the self with lived experiences of selfhood, and (c) use these new understandings to inform health care practice. The participants were four Canadian middle-aged female academic and health care practitioners. We conducted unstructured, open-ended interviews. Through a collaborative, interpretive process, four recurring themes emerged from the women's narratives: struggling for authenticity, inner knowing, changing over time, and the contextual self. We address the need for practitioners to understand theories of the self--their own and their clients--and how these theories impact their clinical practice.

Effects of lipopolysaccharide and cyclosporin on the endocrine control of ovarian function

The effects of stimulating the immune system with lipopolysaccharide (LPS) or suppressing the immune system with cyclosporin (CS) on reproductive functions in the female rat were investigated. Animals were either treated acutely with LPS (2 mg kg-1) or cyclosporin (20 mg kg-1) on dioestrus day 1 and 2 or treated chronically over a period of 6 days (on alternate days with LPS, daily with CS). Chronic LPS treatment induced a state of constant dioestrus and decreased circulating concentrations of progesterone and oestradiol. Chronic CS treatment induced some irregularity in the 4-day vaginal smear pattern in a minority of animals and, while it had no effect on circulating concentrations of progesterone, oestradiol concentrations were suppressed compared with those measured in pro-oestrous animals. LH responses to GnRH were reduced in both perifused pituitary fragments and cultured pituitary cells obtained from animals pretreated with either LPS or CS. In contrast, a low dose of LPS (20 micrograms kg-1) given over 6 days did not disrupt ovarian cycles and reduced, but did not abolish, the second phase primed LH response. Neither drug had a direct effect on the pituitary LH responses to GnRH, except that pituitary cells exposed to high doses of CS for periods greater than 48 h did show attenuated LH responses to GnRH. This finding was not paralleled with high doses of LPS. The differential count of ovarian follicles from histological studies showed that LPS treatment was associated with significantly fewer large preovulatory follicles, whereas animals treated with CS showed a similar distribution of follicular volumes compared with controls.(ABSTRACT TRUNCATED AT 250 WORDS)

Letter: Beta-blockade in the presence of renal disease and hypertension

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