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Small mammals, roe, red deer and domesticated animals like sheep, goats and cattle, are known to be reservoirs for Coxiella burnetii. Currently more than 50 tick species have been identified as vectors in a zoonotic context. In Germany, the states of Baden-Wurttemberg, Bavaria and Hesse are considered to be endemic regions (medium seroprevalence in Baden-Wurttemberg, approx. In these areas there are recurring regional outbreaks of smaller and larger proportions through infected livestock (primarily sheep). The form of disease depends on the inoculum, endemic area, infection host and host factors. The majority of cases are asymptomatic or are self-limiting with flu-like symptoms. Subclinical forms and, sometimes uncharacteristic ailments can considerably complicate or delay diagnosis. Rarer manifestations include myocarditis, pericarditis, endovascular manifestations and meningo-encephalitis. There is a high risk of developing chronic Q fever during pregnancy as well as in patients with a defective heart valve. In order to differentiate between acute and chronic forms of the disease, an analysis of the specific immune response (IgG, IgM antibodies) and a serological differentiation of the reactivity against the different antigen phases of the pathogen are required (phase 1, phase 2). Phase 1 and phase 2 antigens are added separately to all high-quality serological test systems. The presence of IgM antibodies against phase 2 antigens and a corresponding clinical picture is an indication of an acute Q fever infection. These types of results should, however, be confirmed by sera taken during the course of the infection and by detecting a seroconversion for phase 2 IgG antibodies. Chronic Q fever is suspected when anti-phase 1 IgG antibodies with titers > 800 or > 512 (depending on the dilution series used) are detected. With chronic Q fever there are usually much higher phase 1 IgG antibody titers (16, 000) and the IgG antibodies against phase 1 antigens are normally much higher than those against phase 2 antigens. In this stage of infection, specific IgM antibodies usually only have low titers or are completely absent.

Diseases

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The detection of pathogen-specific antibodies is only indicated if direct pathogen detection, for example for osteomyelitis, is unsuccessful despite previous antibiotic treatment. Antibody tests include the antistaphylolysin test in the form of the hemolysis inhibition assay, as well as the latex agglutination test. In the hemolysis inhibition assay, the hemolysis of erythrocytes is inhibited (micro-titer format). Skin and mucous membrane infections, as deep processes or systemically septic infections, result in low titers. Antibodies are detected in 70 to more than 90% of longer-term or severe infections. Hemolysis inhibition assays can be disrupted depending on the quality of the test reagents [16; 355]. Rare indications for indirect pathogen detection include, sites of infection that are difficult to access, diseases conveyed by toxins, and unclear infections after previous treatment with antibiotics [355]. Purulent local diseases: Tonsillitis/pharyngitis (scarlet fever), sinusitis, otitis media Skin and soft tissue infections: erysipelas, phlegmon, impetigo contagiosa Invasive diseases: Necrotizing fasciitis, sepsis, pneumonia Streptococcal-related toxic shock syndrome Immunopathologic secondary diseases: Acute rheumatic fever Acute glomerulonephritis Chorea minor the typical diseases can also be caused by a closely related streptococcal species (Groups C or G), except for in the case of scarlet fever and rheumatic fever. The latency period between purulent tonsillitis and acute rheumatic fever can last between 1 and 5 weeks, while chorea minor does not occur until months after the infection. In the case of acute post-streptococcal glomerulonephritis, which is a typical secondary disease that is observed after oropharyngeal, skin and soft tissue infections, the latency period until manifestation is up to 4 weeks after the primary infection [17; 27]. Although their sensitivity is insufficient (85% at best), they have a good specificity. In the first type of test, 93 polystyrene particles charged with streptolysin O are agglutinated with samples containing anti streptolysin O. The latter is conducted primarily as a biometric dilution test, in the sense of a titration, in which the reciprocal value of the still reactive dilution is specified. When assessing serological results, antibodies against at least two antigens should be determined. Assessing individual results is difficult and progress should be monitored after several weeks in order to determine the point of infection. The rapid regression of high antibody titers is favorable for the prognosis of secondary diseases [356]. The pathogens are no longer detectable once the clinical symptoms of the secondary diseases appear; however, the antibody response indicates a streptococcal etiology. The results of external quality controls reveal a widely varying standardization between the test systems that are commercially available on the market.

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A specification should be available for each material/chemical/radioisotope used as well as for the final dispensed radioactive particle. General requirements [504] Good documentation constitutes the backbone of success of the quality assurance system. A written procedure mitigates errors arising from spoken communication, and offers the tracing of activities accomplished; Documents must be designed determinedly, prepared diligently, reviewed thoroughly, and distributed; It is obligatory that the prepared document should be approved, signed and dated by the appropriate authorised persons; Documents including the title, nature, and purpose should be well-defined and methodically written in a clear-cut fashion. Documents containing instructions should be defined systematically and be easy to follow. The style and language of documents should commensurate their intended use; It is crucial to review the documents periodically and should be up-to-date to comply with new editions of the national pharmacopoeia or other official compendia. During the process of document revision, utmost care must be taken to preclude inadvertent use of superseded documents; Hand-written documents should be avoided. In the situation where documents require data entry, it is crucial to provide sufficient space to incorporate such entries; In the event of any correction made to a document or record, it must be signed or initialled and dated. Whenever necessary, the reason for amending the document must be recorded; Records must trace all activities related with radioactive particle preparation at the time it was done; 91 Critical records must be stored at a secure place having limited accessibility to authorized persons. Additionally, adequate care must be taken to protect the records from loss, destruction, or falsification, and from damage due to fire, water, among others, while kept for storage; Critical records for regulatory compliance for day to day activities must be duplicated on paper, microfilm, or electronically, and stored in a secure location in a separate building located away from the originals; While recording the date, it may be carried out either by electromagnetic or photographic means, where detailed procedures pertaining to the adopted system must be available. In case where documentation is followed through electronic data processing methods, only authorized persons are permitted to enter or modify data in the computer in which access is controlled by passwords or other suitable methods, and entry of critical data must be checked individually; It is equally important that during the period of custody, the extracted data can be readable within an appropriate period of time; and If data is altered, it must be noticeable. It contains step-by-step instructions for the tasks related to production activities. Considering the perceived need to ensure the quality standards of each radiolabelled particle, sometimes it is essential to change the product specifications, manufacturing or control procedures. Written procedures should be in place to justify such modification/alteration, and documented appropriately [504]: 92 Special attention should be given to undertake a review of a representative number of batches either approved or rejected, and a summary of the records associated with the batch must be documented; and There should be established written procedures to review and update regarding complaints, recalls, and returned or salvaged radiolabelled particles. Based on the related investigations, corrective and preventative actions should be taken to allow trend analysis. All production, quality control, and product distribution must have mandatory records for regulatory compliance and should be retained for at least 1-year post expiration date of each batch. Batch records Batch production records constitute a written document of each production batch, prepared during the production of radioactive particles. It contains the following: a sequential data pertaining to each chemical and radioisotope used for production; complete information related to the production; and control of each batch of radiolabelled particles.

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Symptoms are related to the number and location of the eggs in the human host: Schistosoma mansoni and S. The most important effects are the late complications that arise from chronic infection: liver brosis, portal hypertension and its sequelae and possibly colorectal malignancy in the intestinal forms; obstructive uropa thy, superimposed bacterial infection, infertility and bladder cancer in the urinary form of schistosomiasis. Eggs can be deposited at ectopic sites, including the brain, spinal cord, skin, pelvis and vulvovaginal areas. Such infections may be prevalent among bathers in lakes in many parts of the world. Denitive diagnosis of schistosomiasis depends on demonstration of eggs in biopsy specimens, or in the stool by direct smear or on a Kato thick smear, or in urine by the examination of a urine sediment or Nuclepore ltration. More recently, various assays developed to detect schistosome antigens directly in serum or urine have proved useful in detecting current infection and in assessing cure after treatment. People, dogs, cats, pigs, cattle, water buffalo and wild rodents are potential hosts of S. Epidemiological persis tence of the parasite depends on the presence of an appropriate snail as intermediate host, i. The eggs hatch in water and the liberated larvae (miracidia) penetrate into suitable freshwater snail hosts. After several weeks, the cercariae emerge from the snail and penetrate human skin, usually while the person is working, swimming or wading in water; they enter the bloodstream, are carried to blood vessels of the lungs, migrate to the liver, develop to maturity and then migrate to veins of the abdominal cavity. Eggs are deposited in venules and escape into the lumen of the bowel or urinary bladder or end up lodging in other organs, including the liver and the lungs. Infected snails will release cercariae for as long as they live, a period that may last from several weeks to about 3 months. Preventive measures: 1) Treat patients in endemic areas with praziquantel to relieve suffering and prevent disease progression.

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