ABSTRACT
INTRODUCTION: Knowledge of the obligate intracellular bacteria from the Chlamydiaceae family has increased significantly in recent years. Not only new chlamydia species, such as Chlamydia avium or C. buteonis in birds have been described, but also known chlamydia in new host species, such as C. psittaci in horses. This review article provides an up-to-date overview of the zoonotic potential of C. psittaci, C. abortus, C. caviae and C. felis and summarizes current findings on other chlamydia species in different animal species; supplemented by information on optimal sampling and pathogen detection.
INTRODUCTION: Les connaissances sur les bactéries intracellulaires obligatoires de la famille des Chlamydiaceae ont considérablement augmenté ces dernières années. Non seulement de nouvelles espèces de Chlamydies, telles que Chlamydia avium ou C. buteonis chez les oiseaux, ont été décrites, mais également des Chlamydies déjà connues ont été mises en évidence chez de nouvelles espèces hôtes, telles que C. psittaci chez les chevaux. Cet article de synthèse fournit une vue d'ensemble actualisée du potentiel zoonotique de C. psittaci, C. abortus, C. caviae et C. felis et résume les connaissances actuelles sur d'autres espèces de Chlamydies chez différentes espèces animales ; il est complété par des informations sur l'échantillonnage optimal et la détection des agents pathogènes.
Subject(s)
Chlamydia , Zoonoses , Animals , Horses , Zoonoses/microbiologySubject(s)
Bird Diseases/parasitology , Galliformes/parasitology , Parabasalidea/genetics , Protozoan Infections, Animal/parasitology , Animals , Bird Diseases/diagnosis , Bird Diseases/pathology , Intestines/parasitology , Intestines/pathology , Liver/parasitology , Liver/pathology , Molecular Diagnostic Techniques/veterinary , Polymerase Chain Reaction/veterinary , Protozoan Infections, Animal/diagnosis , Protozoan Infections, Animal/pathologyABSTRACT
INTRODUCTION: Rabbit Haemorrhagic Disease Virus 2 (RHDV-2) emerged in France in 2010. In Switzerland, RHDV-2 was first identified in 2015 and apparently has almost replaced the classical Rabbit Haemorrhagic Disease Virus (RHDV) by now. Like RHDV, RHDV-2 causes a viral hepatitis with a peracute course and an increased mortality rate within the rabbitry. RHDV infection causes consistent gross pathological findings, especially in the liver and respiratory tract. Reports about gross pathology for animals naturally infected with RHDV-2 is scarce. The present study analysed the anamnesis and necropsy reports of 35 rabbits examined during routine diagnostics between March 2015 and May 2017. A reverse transcriptase real-time polymerase chain reaction (RT-qPCR) specific for RHDV-2 and RHDV proved a total of 25 animals to be positive for RHDV-2, while none was positive for RHDV. Additionally, histological examinations were performed on liver, lung, and kidney of 18 rabbits that had tested positive by RHDV-2 RT-qPCR. The anamnestic report more often stated an increased mortality rate in RHDV-2 positive (16/18, 89 %) compared to RHDV-2 negative rabbits (3/9, 33 %). Gross pathology did not reveal any pathognomonic changes in RHDV-2 positive animals. Histologically, the liver showed the most severe lesions followed by lung and kidney. Animals positive for RHDV-2 frequently showed signs of gastro-intestinal disease (n = 5) and/or septicaemia (n = 6) masking possible indicators of an RHDV-2 infection, such as the rather unspecific findings of an enlarged spleen or an enlarged, friable, tan-coloured liver. The authors want to raise awareness among clinicians and pathologists that in case of sudden death in commercial or pet rabbits, RHDV-2 needs to be considered as differential diagnosis and should be confirmed by laboratory diagnosis.
INTRODUCTION: Le virus 2 de la maladie hémorragique du lapin (RHDV-2) est apparu en France en 2010. En Suisse, le RHDV-2 a été identifié pour la première fois en 2015 et semble avoir presque remplacé le virus classique de la maladie hémorragique du lapin (RHDV). Comme le RHDV, le RHDV-2 provoque une hépatite virale avec une évolution suraiguë et un taux de mortalité élevé chez les lapins. L'infection par le RHDV entraîne des constatations pathologiques bruts cohérents, notamment au niveau du foie et des voies respiratoires. Les rapports sur la pathologie macroscopique des animaux naturellement infectés par le RHDV-2 sont rares. La présente étude a analysé les rapports d'anamnèse et de nécropsie de 35 lapins examinés lors de diagnostics de routine entre mars 2015 et mai 2017. Une réaction en chaîne par polymérase en temps réel à la transcriptase inverse (RT-qPCR) spécifique pour le RHDV-2 et le RHDV a prouvé qu'un total de 25 animaux étaient positifs pour le RHDV-2, tandis qu'aucun n'était positif pour le RHDV. De plus, des examens histologiques ont été réalisés sur le foie, les poumons et les reins de 18 lapins qui avaient été testés positifs par RT-qPCR pour le RHDV-2. Le rapport anamnestique faisait plus souvent état d'un taux de mortalité accru chez les lapins RHDV-2 positifs (16/18, 89 %) que chez les lapins RHDV-2 négatifs (3/9, 33 %). La pathologie macroscopique n'a révélé aucun changement pathognomonique chez les animaux RHDV-2 positifs. Sur le plan histologique, le foie présentait les lésions les plus graves, suivi des poumons et des reins. Les animaux positifs pour le RHDV-2 présentaient fréquemment des signes de maladie gastro-intestinale (n = 5) et/ou de septicémie (n = 6) masquant les indicateurs possibles d'une infection par le RHDV-2, tels que les découvertes plutôt peu spécifiques d'une rate hypertrophiée ou d'un foie hypertrophié, friable et de couleur beige. Les auteurs souhaitent sensibiliser les cliniciens et les pathologistes au fait qu'en cas de mort subite chez des lapins d'élevage ou de compagnie, le RHDV-2 doit être considéré comme un diagnostic différentiel et doit être confirmé par un diagnostic de laboratoire.
Subject(s)
Caliciviridae Infections , Hemorrhagic Disease Virus, Rabbit , Animals , Caliciviridae Infections/diagnosis , Caliciviridae Infections/veterinary , Hemorrhagic Disease Virus, Rabbit/genetics , Liver , Rabbits , Real-Time Polymerase Chain Reaction/veterinary , SwitzerlandABSTRACT
Three cases of fatal septicaemia due to Plesiomonas shigelloides and one due to Edwardsiella tarda were diagnosed in newborn penguins from the Basle Zoo, Switzerland from 2003 to 2007. The affected penguins were of two different species (king penguin, Aptenodytes patagonicus, and African penguin, Spheniscus demersus) and between 2 and 10 days old at the time of death. The causative agents, E. tarda and P. shigelloides are ubiquitous bacteria which are reported to be present in the normal intestinal flora of wild and captive aquatic animals, including penguins. Their occurrence and infectious potential is discussed.
Subject(s)
Bacteremia/veterinary , Bird Diseases/microbiology , Edwardsiella tarda/isolation & purification , Enterobacteriaceae Infections/veterinary , Plesiomonas/isolation & purification , Spheniscidae , Animals , Animals, Zoo , Bacteremia/microbiology , Bacteremia/mortality , Bird Diseases/mortality , Cause of Death , Enterobacteriaceae Infections/microbiology , Enterobacteriaceae Infections/mortality , Survival RateABSTRACT
On a Swiss grower-finisher farm blood-tinged-diarrhoea in pigs weighing 40 to 60 kg was observed during several months, resulting in reduced feed efficiency and a prolonged fattening period. As part of a research project, in February 2007 faecal samples were analysed and one diseased pig was euthanised and sent for necropsy where typical gut lesions indicative for a Brachyspira (B.) hyodysenteriae infection were found. B. hyodysenteriae was demonstrated by PCR in 4 out of 5 faecal samples. The pig farm thereafter underwent an eradication process with timed depopulation of the consecutive pigpens. During February to June 2008 the farm was regularly inspected and tested for B. hyodysenterieae. Testing continued for another year after the eradication process and all faecal samples proved negative. Until January 2010 neither diarrhoea with blood nor B. hyodysenterieae reoccurred.
Subject(s)
Animal Husbandry/methods , Brachyspira hyodysenteriae/isolation & purification , Dysentery/veterinary , Gram-Negative Bacterial Infections/veterinary , Swine Diseases/prevention & control , Animals , Animals, Domestic , Brachyspira hyodysenteriae/genetics , Dysentery/epidemiology , Dysentery/prevention & control , Feces/microbiology , Gram-Negative Bacterial Infections/epidemiology , Gram-Negative Bacterial Infections/prevention & control , Polymerase Chain Reaction/veterinary , Swine , Swine Diseases/epidemiology , Swine Diseases/microbiology , Switzerland/epidemiologyABSTRACT
INTRODUCTION: Husbandry conditions for rabbits in Switzerland are at a high animal welfare level in international comparison. Wire mesh flooring is prohibited and group housing is mandatory up to the age of eight weeks. Despite these animal-friendly husbandry standards, animal losses seem to be a significant problem, although reliable data on professional Swiss meat rabbit production is lacking to date. A herd survey was carried out in 52 rabbit farms to address this situation. At the same time, each new litter and each fattening group was documented with a standardized form focusing on animal death and the use of medication by the farmer over a one year period. In the case of increased mortality or new health problems, dead rabbits were sent to the National Reference Center for Poultry and Rabbit Diseases (Zurich) for pathological examination including bacteriological and parasitological diagnostics. Data from 32 farms were evaluated. The average mortality of young animals (birth to weaning) was 14.9% (1.0-30.0%) and of fattening rabbits (weaning to slaughter) 17.3% (4.3-31.8%). Intestinal diseases, mainly dysentery, intestinal coccidiosis and mucoid enteropathies, were the primary cause of death (68.2%). Eimeria spp., Escherichia coli and Clostridium perfringens were identified as the most frequent pathogens. Respiratory diseases were found in 18.7% of the examined rabbits, with Pasteurella multocida identified as the most common pathogen. 60.0% of the farms used antibiotics during the study period and a third (34.7%) of all the fattening animals were medicated with at least one antibiotic. The present results confirm that despite high animal welfare standards infectious diseases and mortality rates represent a considerable problem in professional Swiss meat rabbit production. Risk factors of increased morbidity and mortality should be identified to improve rabbit health, to reduce the high mortality rate and the extensive use of antibiotics in professional Swiss meat rabbit production. Practicable management improvements with specific prevention strategies should be developed.
INTRODUCTION: Les conditions d'élevage des lapins en Suisse sont d'un niveau élevé en comparaison internationale. Il est interdit de les garder sur un sol en treillis métallique et leur détention en groupe est obligatoire jusqu'à l'âge de huit semaines. Malgré ces normes d'élevage respectueuses des animaux, les pertes d'animaux semblent être un problème important, les données fiables sur la production professionnelle suisse de lapins de boucherie faisant largement défaut à ce jour. Afin de remédier à cette situation, une enquête d'exploitation a été réalisée dans 52 élevages cunicoles. En parallèle, chaque nouvelle portée et chaque groupe d'engraissement était documenté par le chef d'élevage avec un formulaire standardisé au cours d'une année, l'accent étant principalement mis sur les pertes d'animaux et l'utilisation de médicaments. En cas d'augmentation de la mortalité ou de nouveaux problèmes de santé, les lapins morts étaient envoyés au Centre national de référence pour les maladies de la volaille et des lapins (Zurich) pour une autopsie comprenant des examens bactériologiques et parasitologiques. Les données de 32 entreprises ont pu être évaluées. La mortalité moyenne des jeunes animaux (de la naissance au sevrage) était de 14,9% (1,030,0%), celle des lapins à l'engrais (du sevrage à l'abattage) était de 17,3% (4,3 31,8%). Les maladies intestinales ont été retrouvées en premier lieu (68,2%), principalement la dysenterie, suivie par la coccidiose intestinale et les entéropathies mucoïdes. Eimeria spp., Escherichia coli et Clostridium perfringens ont été identifiés comme les agents pathogènes les plus fréquents par ordre décroissant. Des maladies respiratoires ont été trouvées chez 18,7% des lapins examinés, le pathogène le plus courant étant Pasteurella multocida. 60,0% des élevages examinés ont utilisé des antibiotiques au cours de la période d'étude, environ un tiers (34,7%) de tous les processus d'engraissement examinés ont été traités avec au moins un antibiotique. Les résultats confirment que les maladies infectieuses et les pertes de lapins en Suisse représentent un problème considérable dans l'élevage professionnel malgré un élevage respectueux des animaux. Afin d'améliorer la santé des lapins dans les entreprises de production professionnelles suisses et de réduire ainsi les taux de mortalité élevés et l'utilisation intensive d'antibiotiques, les facteurs de risque d'augmentation de la morbidité et de la mortalité doivent être déterminés dans une étape supplémentaire afin de développer des améliorations de gestion réalisables dans le cadre de stratégies de prévention spécifiques.
Subject(s)
Animal Husbandry , Meat , Animal Welfare , Animals , Farms , Rabbits , SwitzerlandABSTRACT
Worldwide, health systems and care approaches vary widely due to local reality, distance to facilities, cultural norms, resources, staff availability, geography, and politics. Consequently, globally maternal-newborn dyad care and outcomes are highly variable, leading to approximately 800 maternal deaths daily with a 100-fold difference among high- and low-resource countries. Irrespective of where care is received, maternal safety and wellbeing should be preserved. Despite ongoing efforts, however, this is not the case. Large gaps exist between spending and clinical outcomes. Segmented health care, coupled with poor planning and inadequate resource distribution, results in failure to provide essential life-saving treatment. The proposed solution is a regional integrated care model from midwife to advanced level III/IV care and the newborn unit, achieved through effective coordination by site, staff, and clinicians. This model has been successfully implemented in high- to low-resource countries in the past 20 years. In the large diverse population of the United States, constructive steps have been implemented to reduce high maternal mortality in black and rural communities. The COVID-19 pandemic demonstrates the feasibility of rapid resources coordination to provide effective advanced care. The proposed integration of resources will have a major positive impact on the maternal-newborn dyad.
Subject(s)
Delivery of Health Care, Integrated/organization & administration , Delivery of Health Care/organization & administration , Health Resources/organization & administration , Infant Health , Maternal Health Services , Black or African American , COVID-19 , Female , Humans , Infant, Newborn , Maternal Mortality , Midwifery , Pregnancy , Rural Population , United StatesABSTRACT
A fattening pig with enlarged head and abdominal lymph nodes was examined. An aspirate of the abscesses did not produce a conclusive diagnosis. Only an excision with subsequent histological and bacteriological examination showed the mould Mycocladus corymbiferus (syn. Absidia corymbifera) to be present. Similar abscesses should be examined as actinomycosis and leucosis are the main differential diagnoses.
Subject(s)
Mucormycosis/veterinary , Swine Diseases/microbiology , Abscess/microbiology , Abscess/pathology , Abscess/veterinary , Absidia/isolation & purification , Absidia/pathogenicity , Animals , Diagnosis, Differential , Male , Mucormycosis/diagnostic imaging , Mucormycosis/etiology , Mucormycosis/microbiology , Swine , Swine Diseases/diagnostic imaging , Swine Diseases/pathology , UltrasonographyABSTRACT
In the present study, the prevalence of S. aureus in mammary gland quarters of dairy cows in Switzerland was estimated and a risk factor analysis was carried out. Dairy cows were selected by one-step-cluster sampling with stratification by herd size. Forty-seven of 50 randomly chosen farms participated in the study, resulting in 603 cows and 2388 quarter samples. Milk samples were collected in all herds on two occasions two weeks apart. In 6% of cows (95% CI: 2.7-9.3%) at least one milk sample was positive for S. aureus and from 2% (0.8-3.2%) of all quarters, S. aureus was cultured at least once. In four quarters a latent S. aureus infection (agent detected and somatic cell count (SCC) <100,000cell/ml) was diagnosed. Multivariable hierarchic logistical regression analysis yielded five significant risk factors for observing S. aureus in a milk sample: high SCC, a S. aureus-positive neighbouring quarter, a palpable induration in the quarter, and a wound, scar tissue or crush injury affecting the teat. The type of housing (P=0.1596) was also a factor that remained in the model. The mentioned risk factors must be considered during the evaluation of herds with S. aureus problems. The occurrence of latent S. aureus infections emphasises that not only quarters with a high SCC but all quarters of all cows must be cultured for control measures to be effective.
Subject(s)
Cattle Diseases/epidemiology , Cattle Diseases/microbiology , Milk/microbiology , Staphylococcal Infections/veterinary , Staphylococcus aureus/isolation & purification , Animals , Cattle , Cell Count/veterinary , Cross-Sectional Studies , Female , Logistic Models , Multivariate Analysis , Prevalence , Risk Factors , Staphylococcal Infections/epidemiology , Staphylococcal Infections/microbiology , Switzerland/epidemiologyABSTRACT
Stenotrophomonas maltophilia (S. maltophilia) is a nonfermentative bacterium, which is naturally resistant against a panel of commonly-used antibiotics. It is frequently isolated from humans with chronic respiratory disease, e.g. cystic fibrosis or chronic obstructive pulmonary disease. In veterinary medicine S. maltophilia is perceived to be a mere coloniser. We herewith report 7 strains of S. maltophilia isolated from animals, of which 5 strains were harvested from 3 horses, a dog and a cat with chronic respiratory disease. The dog isolate showed resistance to trimethoprim / sulphamethoxazole, which was confirmed by detection of the sul 1 gene. Analysis with pulsed field gel electrophoresis revealed that 2 horses, which were boarded in the same clinic but two years apart, harboured the same strain of S. maltophilia. This is indicative of a hospital acquired colonisation / infection, which contradicts involvement in the pre-existing chronic disease.
Subject(s)
Cross Infection/veterinary , Gram-Negative Bacterial Infections/veterinary , Respiratory Tract Infections/veterinary , Stenotrophomonas maltophilia/isolation & purification , Animals , Cat Diseases/epidemiology , Cat Diseases/microbiology , Cat Diseases/transmission , Cats , Cross Infection/epidemiology , Cross Infection/microbiology , Cross Infection/transmission , Dog Diseases/epidemiology , Dog Diseases/microbiology , Dog Diseases/transmission , Dogs , Drug Resistance, Bacterial/genetics , Gram-Negative Bacterial Infections/epidemiology , Gram-Negative Bacterial Infections/microbiology , Gram-Negative Bacterial Infections/transmission , Horse Diseases/epidemiology , Horse Diseases/microbiology , Horse Diseases/transmission , Horses , Hospitals, Animal , Microbial Sensitivity Tests/veterinary , Respiratory Tract Infections/epidemiology , Respiratory Tract Infections/microbiology , Respiratory Tract Infections/transmission , Species Specificity , Stenotrophomonas maltophilia/classificationABSTRACT
The re-emergence of necrotizing enteritis (NE) in Swiss pig breeding farms raised concern that, besides C. perfringens type C strains, additional C. perfringens toxinotypes might cause this disease. Therefore we retrospectively investigated the association of NE with C. perfringens type C or different C. perfringens toxinotypes. We evaluated pathological lesions, routine diagnostic bacteriology results, and multiplex real-time PCR analyses from DNA extracts of archived intestinal samples of 199 piglets from our diagnostic case load. 96.5% of NE cases and 100% of herds affected by NE were positive for C. perfringens type C genotypes. Animals without necrotizing enteritis revealed a significantly lower detection rate of type C genotypes. Non affected piglets showed a high prevalence for beta-2-toxin positive C. perfringens type A strains. Collectively, our data indicate that outbreaks of NE in piglets in Switzerland cannot be attributed to newly emerging pathogenic toxinotypes, but are due to a spread of pathogenic C. perfringens type C strains.
Subject(s)
Clostridium Infections/veterinary , Clostridium perfringens/isolation & purification , Enteritis/veterinary , Swine Diseases/epidemiology , Animals , Animals, Newborn , Bacterial Toxins/genetics , Clostridium Infections/epidemiology , Clostridium Infections/microbiology , Clostridium perfringens/classification , Clostridium perfringens/pathogenicity , DNA, Bacterial/analysis , Disease Outbreaks/veterinary , Enteritis/epidemiology , Enteritis/microbiology , Enterotoxins/genetics , Female , Genotype , Male , Necrosis/epidemiology , Necrosis/microbiology , Necrosis/veterinary , Retrospective Studies , Swine , Swine Diseases/microbiology , Switzerland/epidemiologyABSTRACT
Necrotizing enteritis (NE) of newborn piglets still represents an economical problem in Swiss pig breeding and production. The aim of our study was to identify risk factors for NE and evaluate the prevalence of C. perfringens with the toxingenes cpb and cpb2 in Swiss pig breeding farms. The prevalence of theses C. perfringens was investigated using fecal swabs followed by bacteriological culturing and genotyping. Close proximity to other breeding farms and large herd sizes were shown to predispose to NE. C. perfringens type C, carrying the genes cpa, cpb and cpb2 were frequently identified in herds with acute outbreaks of NE. Farms not affected by NE or those using prophylactic vaccination against NE were predominantly positive for C. perfringens type A strains with cpb2 and showed much lower prevalence of C. perfringens type C, compared to acutely affected herds. Our results demonstrate that C. perfringens type A strains with cpb2 are not associated with NE. Besides typical necropsy finding, only the identification of cpb can be used for the diagnosis of NE in affected herds.
Subject(s)
Clostridium Infections/veterinary , Clostridium perfringens/classification , Enteritis/veterinary , Enterotoxins/genetics , Swine Diseases/microbiology , Animals , Animals, Newborn , Bacterial Toxins/genetics , Clostridium Infections/epidemiology , Clostridium Infections/microbiology , Clostridium perfringens/isolation & purification , Clostridium perfringens/pathogenicity , DNA, Bacterial/analysis , Disease Outbreaks/veterinary , Enteritis/epidemiology , Enteritis/microbiology , Feces/microbiology , Female , Genotype , Male , Necrosis/epidemiology , Necrosis/microbiology , Necrosis/veterinary , Phylogeny , Prevalence , Retrospective Studies , Risk Factors , Swine , Swine Diseases/epidemiology , Switzerland/epidemiologyABSTRACT
Typing of Clostridium perfringens strains by PCR-based determination of toxin genes proved to be a reliable method for diagnosis of enterotoxaemia in various animal species. We report the establishment and validation of three real-time fluorogenic (TaqMan) multiplex PCRs for the detection of C. perfringens alpha-, beta-, beta2-, epsilon-, entero- and iota-toxin genes. The composition of the PCRs was chosen with regard to robustness of the assays and in order to increase sensitivity compared to the conventional simplex PCRs. The combination of probe dyes selected for the real-time assays (FAM/TAMRA, Cy-5/BHQ-2 and VIC/TAMRA) as well as the designation of the chromosome-borne alpha-toxin as internal positive control allowed the creation of highly specific and sensitive, as well as time and cost effective PCRs. One hundred and three strains of C. perfringens isolated in Switzerland derived from clinical or suspected cases of enterotoxaemia in 10 different animal species were tested. The toxin genotypes were in agreement in both the conventional PCRs and the newly designed multiplex PCRs. Furthermore, the real-time PCR carried out as simplex allows to quantitate the copy numbers of plasmid-borne toxin genes in relation to the chromosomally located alpha-toxin gene.
Subject(s)
Bacterial Toxins/genetics , Cattle Diseases/microbiology , Clostridium perfringens/genetics , Dog Diseases/microbiology , Enterotoxemia/microbiology , Polymerase Chain Reaction/veterinary , Animals , Bacterial Typing Techniques , Cattle , Clostridium perfringens/isolation & purification , Dogs , Enterotoxemia/diagnosis , Feces/microbiology , Genotype , Intestines/microbiology , Polymerase Chain Reaction/economics , Polymerase Chain Reaction/methods , Reproducibility of Results , Sensitivity and SpecificityABSTRACT
The prevalences of Cryptosporidium parvum, rotavirus, bovine coronavirus (BCV), and enterotoxigenic Escherichia coli (E coli K99) were determined in diarrhoeic dairy calves aged one to 21 days on 71 dairy farms in western Switzerland during the winter of 2005 to 2006. Faecal samples from 147 untreated calves suffering from acute diarrhoea were analysed by standardised diagnostic methods, and the immunoglobulin status of each calf was evaluated. The prevalences of C parvum, rotavirus, BCV and E coli k99 were 55.0 per cent, 58.7 per cent, 7.8 per cent and 5.5 per cent, respectively. The proportions of herds positive for the respective pathogens among the herds with diarrhoeic calves were 41.7 per cent, 52.1 per cent, 2.1 per cent and 2.1 per cent. The immunoglobulin concentration in the serum of 90.5 per cent of the diarrhoeic calves was below 8 g/l.
Subject(s)
Cattle Diseases/microbiology , Cattle Diseases/parasitology , Diarrhea/veterinary , Animals , Cattle , Cattle Diseases/blood , Cattle Diseases/epidemiology , Coronavirus Infections/epidemiology , Coronavirus Infections/veterinary , Coronavirus, Bovine/isolation & purification , Cryptosporidiosis/epidemiology , Cryptosporidiosis/veterinary , Cryptosporidium parvum/isolation & purification , Dairying , Diarrhea/microbiology , Diarrhea/parasitology , Escherichia coli/classification , Escherichia coli/isolation & purification , Escherichia coli Infections/epidemiology , Escherichia coli Infections/veterinary , Feces/microbiology , Feces/parasitology , Female , Prevalence , Rotavirus/isolation & purification , Rotavirus Infections/epidemiology , Rotavirus Infections/veterinary , Switzerland/epidemiologyABSTRACT
Fast growing mycobacteria are saprophytic bacteria that prevail in water and soil. They are opportunistic pathogens and may cause various infections if gaining entry into the body through a trauma. We herein describe the clinical presentation, pathology and diagnosis of the first case of cutaneous atypical mycobacteriosis due to Mycobacterium massiliense in a cat.
Subject(s)
Cat Diseases/microbiology , Cat Diseases/pathology , Mycobacterium Infections, Nontuberculous/veterinary , Mycobacterium/isolation & purification , Skin Diseases, Bacterial/veterinary , Animals , Bacterial Typing Techniques/veterinary , Cat Diseases/diagnosis , Cats , Dermis/pathology , Female , Mycobacterium/classification , Mycobacterium/pathogenicity , Mycobacterium Infections, Nontuberculous/diagnosis , Mycobacterium Infections, Nontuberculous/microbiology , Mycobacterium Infections, Nontuberculous/pathology , Skin Diseases, Bacterial/diagnosis , Skin Diseases, Bacterial/microbiology , Skin Diseases, Bacterial/pathologyABSTRACT
The MRE11/RAD50/NBS1 (MRN) complex is a major sensor of DNA double strand breaks, whose role in controlling faithful DNA replication and preventing replication stress is also emerging. Inactivation of the MRN complex invariably leads to developmental and/or degenerative neuronal defects, the pathogenesis of which still remains poorly understood. In particular, NBS1 gene mutations are associated with microcephaly and strongly impaired cerebellar development, both in humans and in the mouse model. These phenotypes strikingly overlap those induced by inactivation of MYCN, an essential promoter of the expansion of neuronal stem and progenitor cells, suggesting that MYCN and the MRN complex might be connected on a unique pathway essential for the safe expansion of neuronal cells. Here, we show that MYCN transcriptionally controls the expression of each component of the MRN complex. By genetic and pharmacological inhibition of the MRN complex in a MYCN overexpression model and in the more physiological context of the Hedgehog-dependent expansion of primary cerebellar granule progenitor cells, we also show that the MRN complex is required for MYCN-dependent proliferation. Indeed, its inhibition resulted in DNA damage, activation of a DNA damage response, and cell death in a MYCN- and replication-dependent manner. Our data indicate the MRN complex is essential to restrain MYCN-induced replication stress during neural cell proliferation and support the hypothesis that replication-born DNA damage is responsible for the neuronal defects associated with MRN dysfunctions.
Subject(s)
Cell Cycle Proteins/metabolism , Cell Proliferation , DNA Repair Enzymes/metabolism , DNA-Binding Proteins/metabolism , Neurons/physiology , Nuclear Proteins/metabolism , Nuclear Proteins/physiology , Oncogene Proteins/physiology , Acid Anhydride Hydrolases , Cell Cycle Proteins/genetics , Cells, Cultured , DNA Repair Enzymes/genetics , DNA Replication , DNA-Binding Proteins/genetics , Gene Expression Regulation , Humans , MRE11 Homologue Protein , N-Myc Proto-Oncogene Protein , Nuclear Proteins/genetics , Transcription, GeneticABSTRACT
Recurrent pericarditis can be associated with many chronic illnesses. Dermatitis herpetiformis is a chronic papulovesicular eruption which is characterized by granular IgA deposits in the dermal papillary tips and associated with a gluten-sensitive enteropathy. We describe the first case of recurrent pericarditis in association with dermatitis herpetiformis. This supposition is supported by exclusion of other possible etiologies and pericardial biopsy which revealed the deposition of IgG, IgA and complement.
Subject(s)
Dermatitis Herpetiformis/immunology , Pericarditis/immunology , Pericardium/immunology , Complement System Proteins/analysis , Dermatitis Herpetiformis/complications , Female , HLA Antigens/analysis , Humans , Immunoglobulin A/analysis , Immunoglobulin G/analysis , Malabsorption Syndromes/complications , Middle Aged , Pericarditis/complications , Recurrence , Skin/immunologyABSTRACT
OBJECTIVE: To determine if a correlation exists between the level of maternal serum alpha-fetoprotein (MSAFP) elevation and the rate of adverse pregnancy outcome, to examine the timing of pregnancies ending in fetal or neonatal death, and to develop a protocol for antepartum surveillance in an effort to prevent these adverse outcomes. STUDY DESIGN: Singleton pregnancies with a single second-trimester elevated MSAFP > or = 2.0 multiples of the median (MoM) were eligible if a targeted ultrasound evaluation (< 24 weeks) was in agreement with the dates and no fetoplacental anomaly was detected. Three groups were established based on the second-trimester MSAFP elevation: 2.0-2.49, 2.5-2.99 and > or = 3.0 MoM. RESULTS: Among the 383 patients enrolled, delivery data were available on 333 infants. Stratified by MSAFP elevations of 2.0-2.49, 2.5-2.99 and > or = 3.0 MoM, the rates of adverse pregnancy outcome were: (1) preterm birth: 14.3%, 15.6%, 20.3%; (2) small for gestational age at birth: 7.4%, 11.1%, 22.2%; and (3) perinatal deaths (neonatal and fetal): 2.6%, 3.3%, 5.6%. Seven pregnancy losses (three neonatal and four fetal deaths) occurred prior to 28 weeks. Of these seven, six fetuses exhibited intrauterine growth retardation by 23-26 weeks' gestation, and five of six were associated with MSAFP levels > or = 2.5 MoM. Four losses (two neonatal and two fetal deaths) occurred after 28 weeks. Of these, three involved structurally normal infants with normal growth who died after 34 weeks. All three of these pregnancies exhibited MSAFP elevations < 2.5 MoM. CONCLUSION: In pregnancies with an unexplained elevated second-trimester MSAFP, the rate of adverse pregnancy outcomes is increased with higher elevations. Any proposed program to improve pregnancy outcome in patients with unexplained MSAFP elevations must include efforts aimed at preventing preterm delivery, repeat ultrasound at 24-26 weeks to rule out early-onset intrauterine growth retardation in pregnancies with elevations > or = 2.5 MoM and fetal biophysical monitoring, even in normally grown fetuses, instituted at 32 weeks to detect fetuses at risk for intrauterine death.