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Brucellosis is common worldwide in a variety of animals and is markedly underreported in man. Brucella abortus seems to be decreasing in cattle herds, but new animal reservoirs are being discovered. Human infection presents a difficult diagnostic challenge because of its protean manifestations and multiplicity of organ involvement. Symptoms vary, but fever, chills, weakness and weight loss are common. Several antibiotics are effective.
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PMID:Brucellosis. 357 87

Brucellosis is a common zoonotic disease transmittable to humans from infected animal reservoirs. Malta, Rock, Gibraltar, Cyprus or Mediterranean fever, Bang's disease, intermittent typhoid or typho-malarial fever, undulant fever, etc. are just various synonyms for brucellosis. Patients suffering from this disease show unspecific symptoms, e.g. fever, chills, malaise, arthralgia, headache, tiredness and weakness. Human brucellosis may be caused by four of totally six genetically and phenotypically closely related Brucella species, i.e. B. melitensis, B. abortus, B. suis and B. canis. Although many organ systems may be involved, brucellosis is rarely fatal. Therapeutic failure and relapses, chronic courses and severe complications like bone and joint involvement, neurobrucellosis and endocarditis are characteristic for the disease. A definite diagnosis requires the isolation of Brucellae from blood, bone marrow or other tissues. However, cultural examinations are time-consuming, hazardous and not sensitive. Thus, clinicians often rely on the indirect proof of infection. The detection of high or rising titers of specific antibodies in the serum allows a tentative diagnosis. A variety of serological tests has been applied, but at least two serological tests have to be combined to avoid false negative results. Usually, the serum agglutination test is used for a first screening and complement fixation or Coombs' test will confirm its results. As Brucella ELISAs are more sensitive and specific than other serological tests, they may replace them step by step. This review will summarize advantages and disadvantages of the serological techniques used in clinical laboratories for indirect verification of human brucellosis.
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PMID:Laboratory-based diagnosis of brucellosis--a review of the literature. Part II: serological tests for brucellosis. 1465 29

Brucellosis is one of the most important reemerging zoonoses in many countries. Brucellosis is caused by Gram-negative coccobacillus belonging to genus Brucella. Human brucellosis often makes the diagnosis difficult. The symptoms and clinical signs most commonly reported are fever, fatigue, malaise, chills, sweats headaches, myalgia, arthralgia, and weight loss. Some cases have been presented with only joint pain, lower backache, and involuntary limb movement, burning feet, or ischemic heart attacks. The focus of this work was to develop a highly sensitive and specific indirect ELISA by using smooth lipopolysaccharide antigen of Brucella abortus 99 to detect anti-Brucella antibodies at Project Directorate on Animal Disease Monitoring and Surveillance. Serum samples collected from 652 individuals in whom fever was not the major symptom but the complaint was of joint pain, headache, lower backache, and so forth, were screened by Rose Bengal plate agglutination test (RBPT) and standard tube agglutination test (STAT). Subsequent testing of sera by indigenous indirect ELISA detected 20 samples positive (3.6% seroprevalence), and indirect ELISA was found to be more sensitive than RBPT and STAT. The seroprevalence in South Karnataka was 2.14%, and in North Karnataka it was 0.92%.
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PMID:Seroprevalence study of human brucellosis by conventional tests and indigenous indirect enzyme-linked immunosorbent assay. 2256 55

We present a 44-year-old man from a rural community in northern Ecuador who worked on a cattle farm where he was involved with primary veterinary care, including assistance during births (or calving) and placenta retention and artificial insemination, with minimal precautions. In September of 2009, quite abruptly, he developed asthenia and hypersomnia without any apparent cause or symptoms like fever, chills, or night sweats. On November 14, 2009, he suffered from pain and edema in the right testicle that coincided with pain in the abdomen. Clinical, serological, and bacteriological investigations confirmed the first case of unilateral orchitis in man in Ecuador caused by Brucella abortus biovar 1. Because brucellosis is a neglected disease, special attention should be given to it in the training of medical and veterinary students.
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PMID:First report of orchitis in man caused by Brucella abortus biovar 1 in Ecuador. 2282 90