Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0038002 (splenomegaly)
 9,873 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The pathogenesis of haemorrhagic enteritis virus (HEV) infection in chickens 3-4 days post-infection was compared with that in turkeys. As expected, infected turkeys showed HEV-specific lesions that included enlargement and mottling of the spleen, as well as haemorrhagic enteritis. In infected chickens, only splenomegaly was observed. The number of HEV-infected cells in the spleen was significantly (P < 0.05) higher in the turkey than in the chicken. In both species, the immunohistochemical labelling of B-cell surface determinants was diminished and the splenic B-cell areas were undetectable after HEV infection. Infection with HEV resulted in an increase in nitric oxide production by macrophages in chickens but not in turkeys.
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PMID:Comparative pathogenesis of haemorrhagic enteritis virus (HEV) infection in turkeys and chickens. 980 27

Chronic urticaria is a common clinical disorder that is idiopathic in over 75% of cases. Less commonly, urticaria may be the presenting manifestation of an allergic or infectious disease, endocrinopathy, inherited syndrome, or autoimmune disorder. Rarely, urticaria may be a sign of underlying malignancy, including leukemia. C.C. is a 48-year-old white female who was referred for evaluation of recurrent urticaria for 3 years. The pruritic, erythematous wheals were pinpoint, and appeared to be precipitated by heat, stress, and effort. Prick tests were negative except to D. pteronyssinus. CBCs over the past 5 years revealed WBCs of 2,300-5,000 cells/mm3. Skin biopsy revealed interstitial edema with infiltration of eosinophils and mast cells consistent with urticaria. The impression was probable cholinergic urticaria, for which hydroxyzine was prescribed with fair symptomatic control. One year later, she presented with bright red blood per rectum. Repeat physical examination revealed lymphadenopathy and splenomegaly. Subsequent laboratory studies showed pancytopenia. Endoscopy was normal except for small, nonbleeding hemorrhoids. Bone marrow biopsy revealed histologic evidence of hair, cell leukemia that was treated with 2-chlorodeoxyadenosine. Upon initiation of chemotherapy her pruritus and urticaria subsided. Recent CBC revealed Hgb 9.2 g/dL, platelets 290,000 cells/mm3, and WBC 4,100 cells/mm3. Peripheral blood smear showed no hairy cells.
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PMID:Chronic urticaria as a presenting sign of hairy cell leukemia. 1007 10

Melioidosis is an infectious disease caused by the saprophytic gram-negative rod Burkholderia pseudomallei. The aim of this study was to establish and characterize a murine model of melioidosis to provide a basis for further investigations on the pathogenesis of the disease. After intravenous infection with B. pseudomallei, C57BL/6 mice were found to be significantly more resistant than BALB/c mice. There was a marked organotropism of B. pseudomallei for the spleen and liver in both strains of mice, with the highest bacterial load in the spleen. Electron microscopic investigations of the spleen clearly demonstrated intracellular replication within membrane-bound phagosomes. Electron micrographs of the liver provided evidence that B. pseudomallei-containing phagosomes in hepatocytes fuse with lysosomes, leading to degradation of bacteria. In both strains of mice, the course of infection was highly dependent on the infective dose and the bacterial strain used, ranging from death within a few days to death after several weeks. In comparison with BALB/c mice, the bacterial counts in C57BL/6 mice were decreased 12 h after infection, which is suggestive of an innate immune mechanism against B. pseudomallei in this early phase of infection contributing to the lower susceptibility of C57BL/6 mice. BALB/c mice developed a more pronounced lymphopenia, granulocytosis, and splenomegaly at a lower infective dose compared to C57BL/6 mice. Analysis of the antibody response against B. pseudomallei 11 days after infection revealed a significantly higher immunoglobulin G2A (IgG2a)/IgG1 ratio in C57BL/6 mice than in BALB/c mice, indicating that a T helper type 1 immune response is associated with resistance to infection with B. pseudomallei.
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PMID:Characterization of a murine model of melioidosis: comparison of different strains of mice. 1033 96

Sophisticated tests and time are needed to establish the diagnosis of fever of unknown origin (FUO). Bayes theorem can guide the clinician to early probabilistic diagnosis. The authors had estimated the a priori probabilities in a previous study yet. In this paper the diagnostic probabilities of four clinical signs (arthralgias, myalgias, splenomegaly, multiple micro-lymphoadenopathies) and the probabilities of abnormalities of some routine laboratory tests (neutrophils count, lymphocytes count, platelets count, hemoglobin, lactic-dehydrogenase, C3 and C4 complement subunits and fibrinogen plasma concentrations, erythrocyte sedimentation rate) and of the positive bacterial cultures, were estimated in the main groups of FUO disease (indefinite, aspecific bacteria infections, non-bacterial or specific bacteria infections, neoplasias, connective tissue diseases, miscellaneous group). The data suggest that the a priori probability is not affected by the clinical signs. Arthralgias increase the probability of connective tissue diseases. Normal erythrocyte sedimentation rate and plasma fibrinogen concentrations increase the probability of paraneoplastic and indefinite fever. Thrombocytosis increases the probability of paraneoplastic fever. Over 1200 U/l serum lactic-dehydrogenase serum concentrations guide to non-bacterial or specific bacteria infectious diseases and to malignancies. Neutrophilia decreases the probability of indefinite diagnosis, even though it is not specific. The heterogeneity of the miscellaneous group makes the interpretations of the data very hard.
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PMID:[Diagnosis of fever of unknown origin: use of Bayes theorem]. 1042 18

Splenomegaly and massive splenomegaly were diagnostically evaluated retrospectively at Stanford University Hospital in 147 patients over 8 years and compared to the nearby county hospital (Santa Clara Valley Medical Center; VMC) in 170 inpatients over 11 years. Hematologic diseases at Stanford (data for VMC in parentheses) occurred in 66% (35%; p < 0.001) of the patients with splenomegaly and in 84% (54%; p < 0.001) of those with massive splenomegaly. Hepatic diseases occurred in 9% (36%; p < 0.001) of the patients with splenomegaly and in 5% (29%; p < 0.001) of those with massive splenomegaly. Splenectomy was performed in 71% of the patients at Stanford and in 9% of those at VMC (p < 0.001). The combined Stanford-VMC series showed significant associations (p < 0.01): for hematologic diseases with massive splenomegaly, lymphadenopathy, and blood cytoses; for hepatic diseases with hepatomegaly, cytopenias as hypersplenism, and abnormal liver function tests, and for infectious diseases with fever.
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PMID:Splenomegaly at a university hospital compared to a nearby county hospital in 317 patients. 1052 11

Infection with blood-stage Plasmodium chabaudi chabaudi AS results in splenomegaly, peripheral leukocytosis, and a major activation of the immune system. The frequencies and absolute numbers of T-cell, B-cell, and macrophage populations in spleen and peripheral blood from P. chabaudi-infected BALB/c mice were compared and found to be significantly altered during acute infection. The kinetics of the redistribution of the different cell types in spleen and peripheral blood were different, with T and B cells appearing in the blood when their frequencies and absolute numbers in the spleen were low. The frequency and absolute number of apoptotic cells in the spleen were increased during acute P. chabaudi infection and involved both T cells, B cells, and macrophages. Both Fas and Fas-ligand expression were increased in the spleen. Taken together, our data provide new information on the complex cellular interactions that take place in the immune system during blood-stage malaria infection in a mouse model.
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PMID:Cellular changes and apoptosis in the spleens and peripheral blood of mice infected with blood-stage Plasmodium chabaudi chabaudi AS. 1120 40

Infection with Plasmodium falciparum is a major cause of anaemia in pregnancy, especially in primigravidae. Of 853 primigravidae visiting an antenatal clinic in Hoima district, western Uganda, for the first time, 530 (62.1%) were found to have P. falciparum parasitaemias and 305 (57.5%) of these had at least 1000 parasites/microliter blood. Plasmodium falciparum parasitaemia was significantly associated with anaemia (relative risk = 0.84, with 95% confidence limits = 0.74-0.96; P = 0.01). Malarial parasites were detected in > 80% of the women who had severe anaemia (P = 0.0008) and haemoglobin concentrations decreased with increasing intensity of infection (P = 0.03). Malarial hyper-reactive splenomegaly was associated with high parasite density (P = 0.01) and low haemoglobin level (P < 0.0001). Effective measures aimed at prevention of malaria and anaemia in pregnancy, especially in primigravidae, would significantly reduce anaemia and its deleterious effects on both the mother and the baby.
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PMID:Anaemia in pregnancy: Plasmodium falciparum infection is an important cause in primigravidae in Hoima district, western Uganda. 1069 Feb 41

Infection of turkeys with the haemorrhagic enteritis virus (HEV), a type II avian adenovirus, results in varying rates of morbidity and mortality. The disease is characterised by splenomegaly, intestinal haemorrhage, sudden death and immunosuppression. The mechanisms of HEV immunopathogenesis and immunosuppression are not fully understood. Recent studies indicate that immune responses play a central role in disease pathogenesis. HEV infects B cells and macrophages and induces necrosis as well as apoptosis in infected and possibly in by-stander cells. The ability of the infected birds to mount an optimum humoral immune response as well as normal macrophage functions such as phagocytosis may be impaired. Elevated numbers of splenic CD4(+) cells during the acute phase of infection may be associated with viral clearance. Types I and II interferons (IFN) and pro-inflammatory cytokines such as interleukin-6 and tumour necrosis-like factors (TNF) are released at the peak of the infection. Cytokines may play a protective as well as a destructive role. While a massive release of proinflammatory cytokines may lead to systemic shock associated with haemorrhagic enteritis and death, release of IFNs may protect turkeys from the disease. Treatment with thalidomide, which is a potent TNF down-regulatory drug, prevented HEV-induced intestinal haemorrhage and treatment with an IFN-inducing chemical prevented HEV-replication and inhibited HEV-induced pathological and histopathological lesions.
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PMID:Immunopathogenesis of haemorrhagic enteritis virus (HEV) in turkeys. 1071 90

Risk factors, prevalence, and intensity of infection with Schistosoma sp. and prevalence and magnitude of morbidity caused by schistosomiasis was assessed in a stratified random sample of 16,433 subjects from 2,409 households in 33 rural communities in Minya Governorate, Egypt. The prevalence of S. haematobium ranged from 1.9% to 32.7% among the communities and averaged 8.9%. The average intensity of infection was a geometric mean egg count (GMEC) of 8.5 per 10 ml of urine and ranged from 1.6 to 30.9. Prevalence was maximum (18-20%) in those 10-20 years of age and higher in males than in females. Intensity of infection followed the same pattern. Infection with S. mansoni was present almost exclusively in a single village, confirming spread of this species up the Nile River and its focality in Minya. Risk factors for S. haematobium infection were an age from 11 to 20; male gender; males bathing in, women washing clothing or utensils in, and children swimming or playing in canals; and a history of, or treatment for, schistosomiasis. Recent history of burning micturition was associated with infection in children but not in adults, while a history of blood in urine correlated with S. haematobium infection in both age groups. Reagent strip-detected hematuria and proteinuria were highly associated, particularly in children, with S. haematobium infection. The presence of hepatomegaly or splenomegaly on physical examination was not associated with S. haematobium ova in the urine. Hepatomegaly, as measured by ultrasonography in the midclavicular line or the midsternal line, or ultrasonography-detected splenomegaly were not present more frequently in infected subjects than in uninfected subjects. Schistosoma ova were not detected more frequently in urine of subjects with ultrasonography-detected periportal fibrosis than in the urine from subjects without this finding. Ultrasonography-detected urinary bladder wall lesions were detected in only 6 (0.3%) subjects and obstructive uropathy was observed in 54 (2.7%) subjects. The absence of an association between prevalence of urinary tract morbidity and S. haematobium infections was surprising. Two possible explanations are 1) that repeated chemotherapy has reduced the prevalence of urinary tract morbidity and 2) that morbidity was not being detected by the ultrasonographic operators.
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PMID:The epidemiology of schistosomiasis in Egypt: Minya Governorate. 1081 2

In the Assiut, Egypt Epidemiology 1, 2, 3 investigation, a sample of 14,204 persons in 10 villages, 31 ezbas (satellite communities), and 2,286 households was drawn from a rural population of 1,598,607. Parasitologic examination of urine and stool were made for Schistosoma haematobium and S. mansoni, and physical and ultrasound examinations were made on a 20% subsample. The overall estimated prevalence of S. haematobium was 5.2 +/- 0.5 (+/- SE). This varied considerably by village and ezba, ranging from 1.5% to 20.9%, with ezbas having a slightly higher overall prevalence than villages. The overall estimated geometric mean egg count was 6.6 +/- 0.5 eggs per 10 ml of urine and was consistently low throughout the communities. Infection with S. haematobium was associated with age (peak prevalence of 10.6 +/- 1.5% in 15-19-year-old age group) males, children playing in the canals, a history of blood in the urine, and reagent strip positivity for hematuria and proteinuria. The prevalence of either hepatomegaly or splenomegaly detected by physical examination was low (4.0% and 1.5%, respectively). The prevalence of hepatomegaly determined by ultrasonography was substantially higher, 24.1%. The prevalence of periportal fibrosis (PPF) was 12.0%, but grade II or III PPF was present in less than 1%. Ultrasonography-determined hepatomegaly, in both the midclavicular line and the midsternal line, increased by age to more than 30%. Periportal fibrosis was more common in the age groups in which infection rates were the highest. At the village and ezba level of analysis, the prevalence of hepatomegaly, splenomegaly, and PPF tended to be higher in communities having the highest prevalence of infection with S. haematobium.
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PMID:The epidemiology of schistosomiasis in Egypt: Assiut governorate. 1081 3


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