Genetic diversity and host alternation of the egg parasitoid Oencyrtus pityocampae between the pine processionary moth and caper bug

Research ArticleThe increased use of molecular tools for species identification in recent decades revealed that each of many apparently generalist parasitoids are actually a complex of morphologically similar congeners, most of which have a rather narrow host range. Ooencyrtus pityocampae (OP), an important egg parasitoid of the pine processionary moth (PPM), is considered a generalist parasitoid. OP emerges from PPM eggs after winter hibernation, mainly in spring and early summer, long before the eggs of the next PPM generation occurs. The occurrence of OP in eggs of the variegated caper bug (CB) Stenozygum coloratum in spring and summer suggests that OP populations alternate seasonally between PPM and CB. However, the identity of OP population on CB eggs seemed uncertain; unlike OP-PPM populations, the former displayed apparently high male/female ratios and lack of attraction to the PPM sex pheromone. We studied the molecular identities of the two populations since the morphological identification of the genus Ooencyrtus, and OP in particular, is difficult. Sequencing of COI and ITS2 DNA fragments and AFLP analysis of individuals from both hosts revealed no apparent differences between the OP-PPM and the OP-CB populations for both the Israeli and the Turkish OPs, which therefore supported the possibility of host alternation. Sequencing data extended our knowledge of the genetic structure of OP populations in the Mediterranean area, and revealed clear separation between East and West Mediterranean populations. The overall level of genetic diversity was rather small, with the Israeli population much less diverse than all others; possible explanations for this finding are discussed. The findings support the possibility of utilizing the CB and other hosts for enhancing biological control of the PPMinfo:eu-repo/semantics/publishedVersio

Ambulatory haemorrhoidal surgery: systematic literature review and qualitative analysis

International audiencePurposeThe aims of this study are to review the advantages and drawbacks of the ambulatory management of patients scheduled for haemorrhoidal surgery and to highlight the reasons for unplanned hospital admission and suggest preventive strategies.MethodsWe conducted a systematic review of the literature from January 1999 to January 2013 using MEDLINE and EMBASE databases. Manuscripts were specifically analysed for failure and side effects of haemorrhoidal surgery in ambulatory settings.ResultsFifty relevant studies (6082 patients) were retrieved from the literature review. The rate of ambulatory management failure ranged between 0 and 61 %. The main reasons for failure were urinary retention, postoperative haemorrhage and unsatisfactory pain control. Spinal anaesthesia was associated with the highest rates of urinary retention. Doppler-guided haemorrhoidal artery ligation has less frequent side effects susceptible to impair ambulatory management than haemorrhoidectomy and stapled haemorrhoidopexy. However, the fact that haemorrhoidopexy is less painful than haemorrhoidectomy may allow ambulatory management.ConclusionDay-case haemorrhoidal surgery can be performed whatever the surgical procedure. Postoperative pain deserves special prevention measures after haemorrhoidectomy, especially by using perineal block or infiltrations. Urinary retention is a common issue that can be responsible for failure; it requires a preventive strategy including short duration spinal anaesthesia. Doppler-guided haemorrhoidal artery ligation is easy to perform in outpatients but deserves more complete evaluation in this setting

Management of anoperineal lesions in Crohn’s disease: a French National Society of Coloproctology national consensus

International audienc

Recommandations pour la pratique clinique du traitement de la maladie hémorroïdaire – texte court [Guidelines for the treatment of hemorrhoids (short report)]

National audienceno abstrac

Anoperineal lesions in Crohn’s disease: French recommendations for clinical practice

International audienceBackground: Anoperineal lesion (APL) occurrence is a significant event in the evolution of Crohn’s disease (CD). Management should involve a multidisciplinary approach combining the knowledge of the gastroenterologist, the colorectal surgeon and the radiologist who have appropriate experience in this area. Given the low level of evidence of available medical and surgical strategies, the aim of this work was to establish a French expert consensus on management of anal Crohn’s disease. These recommendations were led under the aegis of the Société Nationale Française de Colo-Proctologie (SNFCP). They report a consensus on the management of perianal Crohn’s disease lesions, including fistulas, ulceration and anorectal stenosis and propose an appropriate treatment strategy, as well as sphincter-preserving and multidisciplinary management.Methodology: A panel of French gastroenterologists and colorectal surgeons with expertise in inflammatory bowel diseases reviewed the literature in order to provide practical management pathways for perianal CD. Analysis of the literature was made according to the recommendations of the Haute Autorité de Santé (HAS) to establish a level of proof for each publication and then to propose a rank of recommendation. When lack of factual data precluded ranking according to the HAS, proposals based on expert opinion were written. Therefore, once all the authors agreed on a consensual statement, it was then submitted to all the members of the SNFCP. As initial literature review stopped in December 2014, more recent European or international guidelines have been published since and were included in the analysis.Results: MRI is recommended for complex secondary lesions, particularly after failure of previous medical and/or surgical treatments. For severe anal ulceration in Crohn’s disease, maximal medical treatment with anti-TNF agent is recommended. After prolonged drainage of simple anal fistula by a flexible elastic loop or loosely tied seton, and after obtaining luminal and perineal remission by immunosuppressive therapy and/or anti-TNF agents, the surgical treatment options to be discussed are simple seton removal or injection of the fistula tract with biological glue. After prolonged loose-seton drainage of the complex anal fistula in Crohn’s disease, and after obtaining luminal and perineal remission with anti-TNF ± immunosuppressive therapy, surgical treatment options are simple removal of seton and rectal advancement flap. Colostomy is indicated as a last option for severe APL, possibly associated with a proctectomy if there is refractory rectal involvement after failure of other medical and surgical treatments. The evaluation of anorectal stenosis of Crohn’s disease (ARSCD) requires a physical examination, sometimes under anesthesia, plus endoscopy with biopsies and MRI to describe the stenosis itself, to identify associated inflammatory, infectious or dysplastic lesions, and to search for injury or fibrosis of the sphincter. Therapeutic strategy for ARSCD requires medical–surgical cooperation