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https://www.readbyqxmd.com/read/28926539/the-immunology-of-the-allergy-epidemic-and-the-hygiene-hypothesis
#1
Bart N Lambrecht, Hamida Hammad
The immunology of the hygiene hypothesis of allergy is complex and involves the loss of cellular and humoral immunoregulatory pathways as a result of the adoption of a Western lifestyle and the disappearance of chronic infectious diseases. The influence of diet and reduced microbiome diversity now forms the foundation of scientific thinking on how the allergy epidemic occurred, although clear mechanistic insights into the process in humans are still lacking. Here we propose that barrier epithelial cells are heavily influenced by environmental factors and by microbiome-derived danger signals and metabolites, and thus act as important rheostats for immunoregulation, particularly during early postnatal development...
September 19, 2017: Nature Immunology
https://www.readbyqxmd.com/read/28912257/nurse-honeybee-workers-tend-capped-brood-which-does-not-require-feeding-around-the-clock
#2
Moshe Nagari, Yafit Brenner, Guy Bloch
"Nurse" honeybees tend brood around-the-clock with attenuated or no circadian rhythms, but the brood signals inducing this behavior remain elusive. We first tested the hypothesis that worker circadian rhythms are regulated by brood pheromones. We monitored locomotor activity of individually isolated nurse bees that were either exposed to various doses of larval extracts or synthetic brood ester pheromone (BEP). Bees orally treated with larvae extracts showed attenuated circadian rhythms in one of four tested colonies; a similar but statistically non-significant trend was seen in two additional colonies...
September 14, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28899309/waterparks-are-high-risk-for-cryptosporidiosis-a-case-control-study-in-victoria-2015
#3
Tanyth E de Gooyer, Joy Gregory, Marion Easton, Nicola Stephens, Emily Fearnley, Martyn Kirk
BACKGROUND: An increase in notifications of cryptosporidiosis was observed in Victoria between March and April 2015. Cases mostly resided in one metropolitan region and hypothesis-generating interviews identified common exposures to aquatic facilities. We conducted a case-control study to determine exposure source(s) and facilitate control measures. METHODS: Laboratory-confirmed cases of cryptosporidiosis from the region of interest notified between 1 March and 23 April 2015 were included...
June 30, 2017: Communicable Diseases Intelligence Quarterly Report
https://www.readbyqxmd.com/read/28888667/preimmunization-with-a-heat-killed-preparation-of-mycobacterium-vaccae-enhances-fear-extinction-in-the-fear-potentiated-startle-paradigm
#4
James H Fox, James E Hassell, Philip H Siebler, Mathew R Arnold, Andrew K Lamb, David G Smith, Heidi E W Day, Tessa M Smith, Emma M Simmerman, Alexander A Outzen, Kaley S Holmes, Christopher J Brazell, Christopher A Lowry
The hygiene hypothesis or "Old Friends" hypothesis proposes that inflammatory diseases are increasing in modern urban societies, due in part to reduced exposure to microorganisms that drive immunoregulatory circuits, and a failure to terminate inappropriate inflammatory responses. Inappropriate inflammation is also emerging as a risk factor for trauma-related, anxiety, and affective disorders, including posttraumatic stress disorder (PTSD), which is characterized as persistent re-experiencing of the trauma after a traumatic experience...
September 6, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28855411/epstein-barr-virus-cytomegalovirus-and-multiple-sclerosis-susceptibility-a-multiethnic-study
#5
Annette Langer-Gould, Jun Wu, Robyn Lucas, Jessica Smith, Edlin Gonzales, Lilyana Amezcua, Samantha Haraszti, Lie Hong Chen, Hong Quach, Judith A James, Lisa F Barcellos, Anny H Xiang
OBJECTIVE: To determine whether Epstein-Barr virus (EBV) or cytomegalovirus (CMV) seropositivity is associated with multiple sclerosis (MS) in blacks and Hispanics and to what extent measures of the hygiene hypothesis or breastfeeding could explain these findings. EBV and CMV have been associated with MS risk in whites, and the timing and frequency of both viruses vary by factors implicated in the hygiene hypothesis. METHODS: Incident cases of MS or its precursor, clinically isolated syndrome (CIS), and matched controls (blacks, 111 cases/128 controls; Hispanics, 173/187; whites, 235/256) were recruited from the membership of Kaiser Permanente Southern California...
August 30, 2017: Neurology
https://www.readbyqxmd.com/read/28852314/crohn-s-disease-environmental-factors-in-the-developing-world-a-case-control-study-in-a-statewide-catchment-area-in-brazil
#6
Valéria Cristina Loureiro Salgado, Ronir Raggio Luiz, Neio Boechat, Bianca C Schorr, Isabella S Leão, Tiago Nunes, Cyrla Zaltman
AIM: To identify environmental risk factors associated with the development of Crohn's disease (CD) in order to re-assess the hygiene hypothesis. METHODS: A hospital-based, case-control study was carried out with CD patients (n = 145) and controls (n = 163) representing a socioeconomically diverse statewide catchment area in Brazil. Controls were recruited from caregivers of patients seen in different outpatient clinics at the same hospital. A multi-item survey with 94 questions regarding family history of CD, perinatal and childhood circumstances, living conditions, tobacco use and familial socioeconomic status was carried out by interviewers...
August 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28800670/-oral-health-and-pregnancy-patient-survey-using-a-questionnaire
#7
Tobias Odermatt, Andreas Schötzau, Irene Hoesli
Introduction and Hypothesis This study investigated how well pregnant patients were informed about the causes and effects of gingivitis during pregnancy. Factors such as age, level of education and nationality were taken into account. Data was collected for the overall oral hygiene of the patients and differences between outpatient and inpatient pregnancies were shown. Possible risk factors in terms of birth results were also defined. Methods With the use of a questionnaire, 83 patients (40 outpatients/43 inpatients) were asked about their oral hygiene, as well as their knowledge pertaining to the causes and effects of gingivitis...
August 2017: Zeitschrift Für Geburtshilfe und Neonatologie
https://www.readbyqxmd.com/read/28796888/a-double-masked-rct-comparing-four-periodontitis-treatment-strategies-5-year-clinical-results
#8
Hans R Preus, Per Gjermo, Vibeke Baelum
AIM: To test the hypothesis of no difference in the 5-year clinical outcome of therapy between groups of patients treated with conventional over-weeks scaling and root planing or same-day full-mouth-disinfection, with or without adjunctive metronidazole. MATERIALS AND METHODS: Following a three-month oral hygiene phase, 184 periodontitis patients were randomly allocated to one of four treatment regimens 1) full mouth disinfection+metronidazole, 2) full mouth disinfection+placebo, 3) scaling and root planing+metronidazole, 4) scaling and root planing+placebo...
August 10, 2017: Journal of Clinical Periodontology
https://www.readbyqxmd.com/read/28729921/an-outbreak-of-foodborne-norovirus-gastroenteritis-linked-to-a-restaurant-in-melbourne-australia-2014
#9
Shaun P Coutts, Kaye Sturge, Karin Lalor, John A Marshall, Leesa D Bruggink, Nela Subasinghe, Marion Easton
INTRODUCTION: In May 2014 an outbreak of norovirus occurred among patrons of a restaurant in Melbourne, Australia. Investigations were conducted to identify the infectious agent, mode of transmission and source of illness, and to implement controls to prevent further transmission. METHODS: A retrospective case-control study was conducted to test the hypothesis that food served at the restaurant between 9 and 15 May 2014 was the vehicle for infection. A structured questionnaire was used to collect demographic, illness and food exposure data from study participants...
April 2017: Western Pacific Surveillance and Response Journal: WPSAR
https://www.readbyqxmd.com/read/28719274/risk-factors-for-podoconiosis-kamwenge-district-western-uganda-september-2015
#10
Christine Kihembo, Ben Masiira, William Z Lali, Gabriel K Matwale, Joseph K B Matovu, Frank Kaharuza, Alex R Ario, Immaculate Nabukenya, Issa Makumbi, Monica Musenero, Bao-Ping Zhu, Miriam Nanyunja
AbstractPodoconiosis, a noninfectious elephantiasis, is a disabling neglected tropical disease. In August 2015, an elephantiasis case-cluster was reported in Kamwenge District, western Uganda. We investigated to identify the disease's nature and risk factors. We defined a suspected podoconiosis case as onset in a Kamwenge resident of bilateral asymmetrical lower limb swelling lasting ≥ 1 month, plus ≥ 1 of the following associated symptoms: skin itching, burning sensation, plantar edema, lymph ooze, prominent skin markings, rigid toes, or mossy papillomata...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28689246/parasites-and-asthma
#11
REVIEW
Lin Wuhao, Chen Ran, He Xujin, Wu Zhongdao, Paron Dekumyoy, Lv Zhiyue
Nowadays, many studies have found low morbidity of asthma in epidemic areas of parasitic diseases, as shown by the hygiene hypothesis. It is obvious that some parasite infections can prevent asthma and studies have been carried out to clarify the mechanism of the preventive effect and search for the future asthmatic therapies. Previous findings have indicated that this mechanism may be related to the immune response switching from Th1 to Th2 and important cells induced by parasites, including the regulatory T cells, regulatory B cells, dendrite cells, and alternatively activated macrophages...
July 8, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28676192/eosinophilic-esophagitis-the-north-against-the-south-a-bio-economic-social-mechanistic-approach-and-clinical-implications
#12
D García-Compeán, J A González-González, E I González-Moreno, H J Maldonado-Garza
Eosinophilic esophagitis is a chronic antigen-mediated disease characterized by esophageal symptoms, esophageal eosinophilia, and the absence of response to proton pump inhibitors. It is the most frequent cause of dysphagia and food impaction in adults. Its incidence and prevalence is very high in the developed countries (USA, Europe, Australia), where its connotation is that of an emerging epidemic. While studies have been published with large case series in the developed countries, those published in Latin America are small or consist of isolated case reports...
July 1, 2017: Revista de Gastroenterología de México
https://www.readbyqxmd.com/read/28664463/therapeutic-potential-of-helminths-in-autoimmune-diseases-helminth-derived-immune-regulators-and-immune-balance
#13
REVIEW
Meng Wang, Linxiang Wu, Rennan Weng, Weihong Zheng, Zhongdao Wu, Zhiyue Lv
Helminths have accompanied human throughout history by releasing immune-evasion molecules that could counteract an aberrant immune response within the host. In the past decades, helminth infections are becoming less prevalent possibly due to the developed sanitation. Meanwhile, the incidence of autoimmune diseases is increasing, which cannot be exclusively explained by the changes of susceptibility genes. While the hygiene hypothesis casts light on the problem. The infections of helminths are believed to interact with and regulate human immunity with the byproduct of suppressing the autoimmune diseases...
August 2017: Parasitology Research
https://www.readbyqxmd.com/read/28642748/helicobacter-hygiene-atopy-and-asthma
#14
REVIEW
Muhammad Miftahussurur, Iswan A Nusi, David Y Graham, Yoshio Yamaoka
The hygiene hypothesis links environmental and microbial exposures in early life to the prevalence of atopy, allergy, and asthma. Helicobacter pylori infection is typically acquired in childhood and acquisition of the infection is associated with poor household hygiene. Some population surveys have shown an inverse association between H. pylori infection and atopy, allergy, and asthma leading to the suggestion that H. pylori infection may be protective against disease; others consider it simply a biomarker for poor household hygiene...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28622341/hygienic-and-grooming-behaviors-in-african-and-european-honeybees-new-damage-categories-in-varroa-destructor
#15
Beatrice T Nganso, Ayuka T Fombong, Abdullahi A Yusuf, Christian W W Pirk, Charles Stuhl, Baldwyn Torto
Varroa destructor is an ectoparasitic pest of honeybees, and a threat to the survival of the apiculture industry. Several studies have shown that unlike European honeybees, African honeybee populations appear to be minimally affected when attacked by this mite. However, little is known about the underlying drivers contributing to survival of African honeybee populations against the mite. We hypothesized that resistant behavioral defenses are responsible for the survival of African honeybees against the ectoparasite...
2017: PloS One
https://www.readbyqxmd.com/read/28614408/schistosoma-japonicum-infection-downregulates-house-dust-mite-induced-allergic-airway-inflammation-in-mice
#16
Sugan Qiu, Xiaolin Fan, Yingying Yang, Panpan Dong, Wei Zhou, Yongliang Xu, Yonghua Zhou, Fukun Guo, Yi Zheng, Jun-Qi Yang
The "hygiene hypothesis" is a theory try to explain the dramatic increases in the prevalence of autoimmune and allergic diseases over the past two to three decades in developed countries. According to this theory, reduced exposure to parasites and microorganisms in childhood is the main cause for the increased incidences of both T helper 1 (Th1)-mediated autoimmunity and Th2-mediated allergy. In this study, we investigated the impact of Schistosoma japonicum infection on the allergic airway inflammation induced by repeated intracheal inoculations of house dust mites (HDM), which is a Th17 and neutrophils dominant murine asthma model, mimicking severe asthma...
2017: PloS One
https://www.readbyqxmd.com/read/28605817/-handling-and-reprocessing-of-semicritical-medical-devices-in-the-ent-a-prospective-study
#17
Roland Hülse, Angela Wenzel, J Ulrich Sommer, Manfred Hülse, Karl Hörmann
Numerous laws, guidelines and recommendations govern the handling and reprocessing of semi-critical medical devices in the field of ENT. Although mechanically reprocessing is characterized as a preferential, manual reprocessing is still conducted in most ENT clinics and medical practices for reasons of cost and practicability. In the presented study, we developed an optimized hygienic concept for reprocessing of medical products in the field of ENT.A demand analysis of rigid endoscopes and of ENT equipment was carried out based on hypothesis that only mechanical reprocessing was performed for the entire instrumentation...
August 2017: Laryngo- Rhino- Otologie
https://www.readbyqxmd.com/read/28580341/targeting-innate-immunity-to-downmodulate-adaptive-immunity-and-reverse-type-1-diabetes
#18
REVIEW
Arata Itoh, William M Ridgway
Type 1 diabetes (T1D) is characterized by specific destruction of pancreatic insulin-producing beta cells accompanied by evidence of beta-cell-directed autoimmunity such as autoreactive T cells and islet autoantibodies (IAAs). Currently, T1D cannot be prevented or reversed in humans. T1D is easy to prevent in the nonobese diabetic (NOD) spontaneous mouse model but reversing new-onset T1D in mice is more difficult. Since the discovery of the T-cell receptor in the 1980s and the subsequent identification of autoreactive T cells directed toward beta-cell antigens (eg, insulin, glutamic acid decarboxylase), the dream of antigen-specific immunotherapy has dominated the field with its promise of specificity and limited side effects...
2017: ImmunoTargets and Therapy
https://www.readbyqxmd.com/read/28494794/juvenile-idiopathic-arthritis-in-relation-to-perinatal-and-maternal-characteristics-a-case-control-study
#19
Samantha W Bell, Susan Shenoi, J Lee Nelson, Parveen Bhatti, Beth A Mueller
BACKGROUND: Existing data on associations between maternal and early childhood exposures and juvenile idiopathic arthritis (JIA) risk is scant and inconsistent with previous studies showing potential role for prematurity, number of siblings and infections. We explored JIA and International League of Associations for Rheumatology (ILAR) JIA categories in relation to selected infant (birthweight, size-for-gestational-age, gestational age), and maternal (parity, delivery type, prior fetal loss) characteristics that may be markers for exposures related to two pathways (hygiene hypothesis, microchimerism) potentially associated with autoimmune disorder occurrence...
May 11, 2017: Pediatric Rheumatology Online Journal
https://www.readbyqxmd.com/read/28474475/what-happened-to-koch-s-postulates-in-diarrhoea
#20
Shamima Sultana, Shafiqul A Sarker, Harald Brüssow
In 1890, Robert Koch has formulated postulates describing what criteria a parasite has to fulfil to qualify as an aetiological agent for an infectious disease. Since then Koch's postulates have experienced reformulations by nearly every generation of microbiologists reflecting new discoveries changing the understanding of infectious diseases pathogenesis. The latest addition to this discussion is the role of the host commensal microbiota in turning infections into disease. After an overview of the historical developments of the postulates, data on diarrhoea aetiology from Bangladesh with respect to Koch's postulates were analysed...
May 4, 2017: Environmental Microbiology
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