980 resultados para Magnus III Berfœtti, king of Norway, 1073-1103.


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There is no effective chemotherapy against diseases caused by Phytomonas sp., a plant trypanosomatid responsible for economic losses in major crops. We tested three triazolo-pyrimidine complexes [two with Pt(II), and another with Ru(III)] against promastigotes of Phytomonas sp. isolated from Euphorbia characias. The incorporation of radiolabelled precursors, ultrastructural alterations and changes in the pattern of metabolite excretion were examined. Different degrees of toxicity were found for each complex: the platinun compound showed an inhibition effect on nucleic acid synthesis, provoking alterations on the levels of mitochondria, nucleus and glycosomes. These results, together with others reported previously in our laboratory about the activity of pyrimidine derivatives, reflect the potential of these compounds as agents in the treatment of Phytomonas sp.

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This study analyzes the fluorimetric determination of alanyl- (Ala), glutamyl- (Glu), leucyl-cystinyl- (Cys) and aspartyl-aminopeptidase (AspAp) urinary enzymatic activities as early and predictive biomarkers of renal dysfunction in cisplatin-treated rats. Male Wistar rats (n = 8 each group) received a single subcutaneous injection of either saline or cisplatin 3.5 or 7 mg/kg, and urine samples were taken at 0, 1, 2, 3 and 14 days after treatment. In urine samples we determined Ala, Glu, Cys and AspAp activities, proteinuria, N-acetyl-β-D-glucosaminidase (NAG), albumin, and neutrophil gelatinase-associated lipocalin (NGAL). Plasma creatinine, creatinine clearance and renal morphological variables were measured at the end of the experiment. CysAp, NAG and albumin were increased 48 hours after treatment in the cisplatin 3.5 mg/kg treated group. At 24 hours, all urinary aminopeptidase activities and albuminuria were significantly increased in the cisplatin 7 mg/kg treated group. Aminopeptidase urinary activities correlated (p<0.011; r(2)>0.259) with plasma creatinine, creatinine clearance and/or kidney weight/body weight ratio at the end of the experiment and they could be considered as predictive biomarkers of renal injury severity. ROC-AUC analysis was made to study their sensitivity and specificity to distinguish between treated and untreated rats at day 1. All aminopeptidase activities showed an AUC>0.633. We conclude that Ala, Cys, Glu and AspAp enzymatic activities are early and predictive urinary biomarkers of the renal dysfunction induced by cisplatin. These determinations can be very useful in the prognostic and diagnostic of renal dysfunction in preclinical research and clinical practice.

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BACKGROUND A catheter-based approach after fibrinolysis is recommended if fibrinolysis is likely to be successful in patients with acute ST-elevation myocardial infarction. We designed a 2x2 randomized, open-label, multicenter trial to evaluate the efficacy and safety of the paclitaxel-eluting stent and tirofiban administered after fibrinolysis but before catheterization to optimize the results of this reperfusion strategy. METHODS AND RESULTS We randomly assigned 436 patients with acute ST-elevation myocardial infarction to (1) bare-metal stent without tirofiban, (2) bare-metal stent with tirofiban, (3) paclitaxel-eluting stent without tirofiban, and (4) paclitaxel-eluting stent with tirofiban. All patients were initially treated with tenecteplase and enoxaparin. Tirofiban was started 120 minutes after tenecteplase in those patients randomly assigned to tirofiban. Cardiac catheterization was performed within the first 3 to 12 hours after inclusion, and stenting (randomized paclitaxel or bare stent) was applied to the culprit artery. The primary objectives were the rate of in-segment binary restenosis of paclitaxel-eluting stent compared with that of bare-metal stent and the effect of tirofiban on epicardial and myocardial flow before and after mechanical revascularization. At 12 months, in-segment binary restenosis was similar between paclitaxel-eluting stent and bare-metal stent (10.1% versus 11.3%; relative risk, 1.06; 95% confidence interval, 0.74 to 1.52; P=0.89). However, late lumen loss (0.04+/-0.055 mm versus 0.27+/-0.057 mm, P=0.003) was reduced in the paclitaxel-eluting stent group. No evidence was found of any association between the use of tirofiban and any improvement in the epicardial and myocardial perfusion. Major bleeding was observed in 6.1% of patients receiving tirofiban and in 2.7% of patients not receiving it (relative risk, 2.22; 95% confidence interval, 0.86 to 5.73; P=0.14). CONCLUSIONS This trial does not provide evidence to support the use of tirofiban after fibrinolysis to improve epicardial and myocardial perfusion. Compared with bare-metal stent, paclitaxel-eluting stent significantly reduced late loss but appeared not to reduce in-segment binary restenosis. CLINICAL TRIAL REGISTRATION URL: http://clinicaltrials.gov. Unique identifier: NCT00306228.

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We investigated the effects of uninephrectomy (UNX) in 6-week-old male and female rats on blood pressure (BP), renal sodium handling, salt sensitivity, oxidative stress, and renal injury over 18 months postsurgery, studying control sham-operated and UNX-operated rats at 6, 12, and 18 months postsurgery, evaluating their renal sodium handling, BP, urinary isoprostanes, N-acetyl-β-D-glucosaminidase, and proteinuria before and after a 2-week high-salt intake period. At 18 months, plasma variables were measured and kidney samples were taken for the analysis of renal morphology and tissue variables. BP was increased at 6 months in male UNX rats versus controls and at 12 and 18 months in both male and female UNX rats and was increased in male versus female UNX groups at 18 months. UNX did not affect water and sodium excretion under basal conditions and after the different test in male and female rats at different ages. However, the renal function curve was shifted to the right in both male and female UNX rats. High-salt intake increased BP in both UNX groups at 6, 12, and 18 months and in the female control group at 18 months, and it increased proteinuria, N-acetyl-β-D-glucosaminidase, and isoprostanes in both UNX groups throughout the study. Renal lesions at 18 months were more severe in male versus female UNX rats. In summary, long-term UNX increased the BP, creatinine, proteinuria, pathological signs of renal injury, and salt sensitivity. Earlier BP elevation was observed and morphological lesions were more severe in male than in female UNX rats.

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Chagas disease, in the Amazon Region as elsewhere, can be considered an enzootic disease of wild animals or an anthropozoonosis, an accidental disease of humans that is acquired when humans penetrate a wild ecosystem or when wild triatomines invade human dwellings attracted by light or searching for human blood. The risk of endemic Chagas disease in the Amazon Region is associated with the following phenomena: (i) extensive deforestation associated with the displacement of wild mammals, which are the normal sources of blood for triatomines, (ii) adaptation of wild triatomines to human dwellings due to the need for a new source of blood for feeding and (iii) uncontrolled migration of human populations and domestic animals that are already infected with Trypanosoma cruzi from areas endemic for Chagas disease to the Amazon Region. Several outbreaks of severe acute cases of Chagas disease, as well as chronic cases, have been described in the Amazon Region. Control measures targeted to avoiding endemic Chagas disease in the Amazon Region should be the following: improving health education in communities, training public health officials and communities for vector and Chagas disease surveillance and training local physicians to recognise and treat acute and chronic cases of Chagas diseases as soon as possible.

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A description is presented of Lutzomyia tolimensis sp. nov., a new species of the subgenus Helcocyrtomyia, series sanguinaria. It was collected in dwellings, peridomestic environment and in nearby forest patches located in the foothills of the Andean Central Cordillera, where in 2004-2006 occurred the largest epidemic ever recorded of leishmaniasis in Colombia. The male of this species is differentiated from other members of the series sanguinaria based on the following combination of characters: (i) base of coxite with 0-3 subequal setae, (ii) spines of gonostyle organized in positions 2.1.2, (iii) spines inserted on distal half of gonostyle and (iv) relationship of alar indices. The female is recognized principally by the following characters: (i) palpomere V longer than III, (ii) length of labro-epipharynx and (iii) relationship of the alar indices.

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The lack of knowledge regarding polycystic hydatid disease results in delayed or even incorrect diagnosis. The lack of systematic information regarding treatment also makes it difficult to assess the results and prognosis in patients with peritoneal and hepatic lesions caused by Echinococcus vogeli. Here we describe the clinical features of patients, propose a radiological classification protocol and describe a therapeutic option for the treatment of hydatid disease that previously had only been used for cases of cystic echinococcosis (Echinococcus granulosus). A prospective cohort study was initiated in 1999 and by 2009 the study included 60 patients. These patients were classified according to the PNM classification (parasite lesion, neighbouring organ invasion and metastases) and placed in one of three therapeutic modalities: (i) chemotherapy with albendazole at a dose of 10 mg/kg/day, (ii) surgical removal of cysts or (iii) percutaneous puncture of the cysts via puncture, aspiration, injection and re-aspiration (PAIR). The results were stratified according to therapeutic outcome: "cure", "clinical improvement", "no improvement", "death" or "no information". The PNM classification was useful in indicating the appropriate therapy in cases of polycystic hydatid disease. In conclusion, surgical therapy produced the best clinical results of all the therapies studied based on "cure" and "clinical improvement" outcomes. The use of PAIR for treatment requires additional study.

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ABSTRACT :Azole antifungal drugs possess fungistatic activity in Candida albicans making this human pathogen tolerant to these agents. The conversion of azoles into fungicidal agents is of interest since their fungistatic properties increase the ability of C. albicans to develop drug resistance. In C. albicans, the phosphatase calcineurin (calcineurin) is essential for antifungal drug tolerance. Up to now, the only known target of calcineurin is Crzl, which is a transcription factor (TF) involved in responses to ionic stress. Thus, most of the components of the calcineurin signaling remain to be identified in C. albicans.In this work, the calcineurin pathway was investigated in order to i) characterize the role of calcineurin in the biology of C. albicans, ii) identify putative targets of calcineurin and iii) characterize the phenomenon of tolerance to antifungal drugs. Towards these aims, four different approaches were used.First, using C. albicans microarrays, an attempt was made to identify a set of calcineurindependent genes (CDGs). Since CDGs were highly dependent upon the external stimulus used to activate calcineurin (Ca2+ or terbinafine), this stimulus bias was bypassed by the construction of strains expressing a truncated autoactive form of calcineurin (Cmp1tr) in a doxycyclinedependent manner. The characterization of Cmpltr was undertaken and results showed that it mimicked awild-type activated calcineurin for all tested phenotypes (i.e. Cnbl-dependence, inhibition by FK506, phosphatase 2B activity, ability to dephosphorylate Crzl and to regulate Crz1-and calcineurin-dependent genes, role in antifungal drug tolerance and susceptibility, role in colony formation on Spider agar). Cmp1tr was therefore considered as a valid tool to study the calcineurin signaling pathway. In silico analysis of CDGs allowed the identification of i) a significant overlap between CDGs and genes regulated by the Cyrl signalíng pathway, ii) putative interactions between calcineurin activation and cell wall reorganization and phospholipid transport, iii) a putative interactión between calcineurin and the regulation of translation and iv) a putative relation between calcineurin and proteasome regulation. Further in silico analyses of the promoters of Crz1-independent CDGs were performed to identify TFs (other than Crz1) that were likely to regulate CDGs and therefore to be a direct target of calcineurin. The analyses revealed that Rpn4 and Mnl1 were TFs likely to be regulated by calcineurin.Second, in order to better characterize azole tolerance, an attempt was made to i) confirm the role of Hsp90 in fluconazole tolerance with a doxycycline-dependent Hsp90 expression system and ii) assess its calcineurin-dependence. Hsp90 was found to be significantly involved in fluconazole tolerance. However, results were not in agreement with the hypothesis that Hsp90 mediates fluconazole tolerance by the only downstream effector calcineurin. Rather Hsp90 is interacting with numerous components for fluconazole tolerance.Third, a collection of C. albicans TFs mutants were screened for loss of tolerance to terbinafine and fluconazole in order to identify TFs involved in antifungal drug tolerance. Out of the 265 TFs mutants screened, only the upc2Δ/Δ mutant showed a loss of fluconazole and terbinafine tolerance. Interestingly, no relation between Upc2 and calcineurin activity was found. These results suggested that the tolerance to antifungal drugs must not be only considered as a calcineurin-dependent phenomenon in C. albicans.Fourth, using FRCS analyses, an attempt was made to identify putative signs of programmed cell death (PCD) in calcineurin mutant cells upon loss of tolerance to terbinafine. A high proportion of cells died from both RO5-dependent (which is a sign of PCD) and ROS-independent (which is a sign of loss of homeostasis) processes in the calcineurin mutant. While these results suggest that calcineurin represses both loss of homeostasis and PCD, the role of calcineurin in PCD is still an open question.In conclusion, this work allowed i) the identification of several putative calcineurin targets, ii) the discovery of several links between calcineurin and signaling pathways and important biological processes and iii) the identification of novel components of calcineurin-independent mechanisms that participate in tolerance to antifungal drugs in C. albicans.RÉSUME :Les azoles sont des antifongiques qui présentent une activité fongistatique contre Candida albicans et rendent cette levure tolérante à ces agents. La conversion des azoles en agents fongicides est d'intérêts car leurs propriétés fongistatiques favorisent le développement de résistance aux drogues chez C. albicans. La calcineurine (calcineurin) est une phosphatase essentielle pour la tolérance aux antifongiques chez C. albicans. La seule cible connue de la calcineurin est Crz1, un facteur de transcription (FT) impliqué dans la réponse aux stress ionique. Ainsi, la plupart des constituants de la voie de signalisation de la calcineurin restent encore à être identifiés chez C. albicans.Dans ce travail de thèse, la voie de signalisation de la calcineurin a été étudiée de sorte à i) caractériser le rôle de la calcineurin dans la biologie de C. albicans, ii) identifier de nouvelles cibles de la calcineurin et iii) caractériser le phénomène de tolérance aux antifongiques. A ce propos, quatre approches ont été entreprises.Premièrement, des puces à ADN de C. albicans ont été utilisées afin d'identifier les gènes dépendants de la calcineurin (GDCs). Les GDCs étant étroitement dépendants du stimulus utilisé pour activer la calcineurin, le biais «stimulus» a été évité via la construction d'une souche exprimant une forme tronquée et autoactive de la calcineurin (Cmp1tr), en présence de doxycycline. La caractérisation de Cmp1tr a été entreprise et les résultats ont montré qu'elle mimait une calcineurin sauvage et activée pour la plupart des phénotypes testés (i.e. dépendance à Cnb1, inhibition par le FK506, activité phosphatase 2B, déphosphorylation de Crz1 et régulation de gènes dépendant de la calcineurin, rôle dans la tolérance et la susceptibilité aux antifongiques, rôle dans la formation des colonies sur milieu Spider). Cmp1tr a donc été considéré comme un outil pertinent pour l'étude de la voie de signalisation de la calcineurin. Les analyses in silico des GDCs ont permis l'identification i) d'un chevauchement entre les GDCs èt les gènes régulés par la voie de signalisation de Cyrl, ii) d'une interaction entre la calcineurin et la réorganisation de la paroi cellulaire ainsi que le transport des phospholipides, iii) d'une interaction entre calcineurin et la régulation de la traduction et iv) une relation entre la calcineurin et la régulation du protéasome. De plus, une analyse in silico des promoteurs des GDCs avec une régulation indépendante de Crz1 a permis d'identifier deux FTs qui pourraient être des cibles directes de la calcineurin, Rpn4 et Mnll.Deuxièmement, afin de caractériser la tolérance aux azoles, il a été entrepris i) de confirmer le rôle de Hsp90 dans la tolérance au fluconazole en utilisant un système d'expression dépendant de la doxycycline et ii) de caractériser sa dépendance à la calcineurin. Hsp90 a été montré impliqué dans la tolérance aux azoles. Cependant, les résultats n'ont pas corroboré une hypothèse expliquant le rôle d'Hsp90 dans la tolérance aux antifongiques par son unique. interaction avec la calcineurin. Il a été proposé que le rôle d'Hsp90 dans la tolérance aux antifongiques soit dû à ces multiples interactions avec le protéome de C. albicans plutôt que par son interaction avec un partenaire unique.Troisièmement, une collection de mutant pour des FTs de C. albicans a été criblée pour une perte de tolérance au fluconazole ou à la terbinafine, de sorte à identifier les FTs impliqués dans la tolérance aux antifongiques. Sur les 265 FTs passés au crible, seul le mutant upc2Δ/Δ a montré une perte de tolérance au fluconazole et à la terbinafine. Aucune relation n'a été trouvée entre la calcineurin et l'activité d'Upc2. Ces résultats suggèrent que la perte de tolérance aux antifongiques ne doit pas être considérée comme un phénomène exclusivement lié à la voie de signalisation de la calcineurin.Quatrièmement, en utilisant la cytométrie de flux, la présence de signes de mort cellulaire programmée (MCP) a été recherchée lors de la perte de tolérance du mutant calcineurin incubé avec de la terbinafine. Une grande proportion de cellules mortes incluant ou non une production de ROS (un signe de MCP) a été détectée dans le mutant calcineurin. Ces résultats préliminaires suggèrent que la calcineurin réprime autant la perte d'homéostasie qu'elle régule l'entrée en MCP. Cependant d'autres analyses sont nécessaires pour démontrer clairement le rôle de la calcineurin dans la régulation de la MCP.En conclusion, ce travail de thèse a permis i) l'identification de plusieurs cibles possibles de la calcineurine, ii) la découverte de plusieurs interactions entre la calcineurine et d'autres voies de signalisation et processus biologiques importants et iii) de démontrer la présence de voies indépendantes de la calcineurine impliquées dans la tolérance aux antifongiques chez C. albicans.

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Malnutrition affects 40-50% of patients with ear, nose and throat (ENT) cancer. The aim of this study was to assess changes induced by a specific nutritional supplement enriched with n-3 polyunsaturated fatty acids, fiber and greater amounts of proteins and electrolytes, as compared with a standard nutritional supplement, on markers of inflammation, oxidative stress and metabolic status of ENT cancer patients undergoing radiotherapy (RT). Fourteen days after starting RT, 26 patients were randomly allocated to one of two groups, 13 supplemented with Prosure, an oncologic formula enriched with n-3 polyunsaturated fatty acids, fiber and greater amounts of proteins and electrolytes (specific supplement), and 13 supplemented with Standard-Isosource (standard supplement). Patients were evaluated before RT, and 14, 28 and 90 days after starting RT. The results showed that there were no significant differences between the groups, but greater changes were observed in the standard supplement group, such as a decline in body mass index (BMI), reductions in hematocrit, erythrocyte, eosinophil and albumin levels, and a rise in creatinine and urea levels. We concluded that metabolic, inflammatory and oxidative stress parameters were altered during RT, and began to normalize at the end of the study. Patients supplemented with Prosure showed an earlier normalization of these parameters, with more favorable changes in oxidative stress markers and a more balanced evolution, although the difference was not significant.

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Abstract A prospective 1-year follow-up study in ear, nose, and throat (ENT) cancer patients was carried out one year after radiotherapy to assess the effect of varying consumption of ω3 fatty acid according to whether they consumed more or less than the 50th percentile of ω3 fatty acids. Clinical, analytical, inflammatory (CRP and IL-6), and oxidative variables (TAC, GPx, GST, and SOD) were evaluated. The study comprised 31 patients (87.1% men), with a mean age of 61.3 ± 9.1 years. Hematological variables showed significant differences in the patients with a lower consumption of ω3 fatty acids. A lower mortality and longer survival were found in the group with ω3 fatty acid consumption ≥50th percentile but the differences were not significant. No significant difference was reached in toxicity, inflammation, and oxidative stress markers. The group with ω3 fatty acid consumption <50th percentile significantly experienced more hematological and immune changes.

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Background: Isolated complex III deficiencies are caused by mutations in the mitochondrial CytB gene, in the BCS1L gene coding for a CIII assembly factor and in the UQCRQ gene that codes for the ubiquinone binding protein of complex III. Objective: Description of clinical features, mitochondrial function and molecular genetic analysis in a patient with an isolated complex III deficiency. Patient: A 17 year old boy, born to consanguineous parents who presented with hypoglycemia, glycosuria, deafness, growth retardation, Fanconi Syndrome and severe lactic acidosis in the neonatal period. Methods: Activities and assembly of OXPHOS complexes were investigated spectrophotometrically and by BN-PAGE. mt-DNAwas screened for deletions. Cytochrome b (CytB) and the BCS1L gene were sequenced. Results: Isolated complex III deficiency was detected in the patient's skeletal muscle. Using BN-PAGE blotting a complex III of lower molecular weight was detected. Staining the 2D reveals a missing subunit. No mutation was detected in the mitochondrial CytB gene. Sequence analysis of BCS1L revealed a novel homozygous point mutation p.M48V. Conclusion: The patients decreased complex III activity is most likely caused by incomplete assembly of complex III due to the homozygous p. M48V mutation in the BCS1L gene.

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Small daily positive energy imbalances of 200 to 800 kJ (about 50 to 200 kcal) due to reduced resting energy expenditure (REE), reduced diet-induced thermogenesis, or physical inactivity are believed to predispose to obesity. However, estimates of the magnitude of the weight gain often fail to account for concurrent changes in body composition and increases in maintenance energy requirements as weight increases and energy equilibrium is re-established. Using previously reported data on body composition and REE in women and the energy cost of tissue deposition, we used mathematical models to predict the theoretical effect of a persistent reduction in energy expenditure on long-term weight gain, assuming no adaptation in energy intake. The analyses indicate the following effects of a reduced level of energy expenditure in lean and obese women: (i) REE rises more slowly with increasing degrees of obesity due to a declining proportion of the more metabolically active fat-free mass; so, for the same positive energy balance, a significantly greater weight gain is expected for obese than for lean women before energy equilibrium is re-established; (ii) due to the greater energy density of adipose tissue, the time course of weight gain to achieve energy balance is longer for obese subjects: in general, this is approximately five years for lean and ten years for obese women; (iii) the magnitude of weight gain of lean women in response to a reduced energy expenditure of 200 to 800 kJ/day is only about 3 to 15 kg, amounts insufficient to explain severe obesity.

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Flow cytometry (FCM) is emerging as an important tool in environmental microbiology. Although flow cytometry applications have to date largely been restricted to certain specialized fields of microbiology, such as the bacterial cell cycle and marine phytoplankton communities, technical advances in instrumentation and methodology are leading to its increased popularity and extending its range of applications. Here we will focus on a number of recent flow cytometry developments important for addressing questions in environmental microbiology. These include (i) the study of microbial physiology under environmentally relevant conditions, (ii) new methods to identify active microbial populations and to isolate previously uncultured microorganisms, and (iii) the development of high-throughput autofluorescence bioreporter assays

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We have mapped the genes coding for two major structural polypeptides of the vaccinia virus core by hybrid selection and transcriptional mapping. First, RNA was selected by hybridization to restriction fragments of the vaccinia virus genome, translated in vitro and the products were immunoprecipitated with antibodies against the two polypeptides. This approach allowed us to map the genes to the left hand end of the largest Hind III restriction fragment of 50 kilobase pairs. Second, transcriptional mapping of this region of the genome revealed the presence of the two expected RNAs. Both RNAs are transcribed from the leftward reading strand and the 5'-ends of the genes are separated by about 7.5 kilobase pairs of DNA. Thus, two genes encoding structural polypeptides with a similar location in the vaccinia virus particle are clustered at approximately 105 kilobase pairs from the left hand end of the 180 kilobase pair vaccinia virus genome.

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Family Caregiver Support Program (Title III-E) - The Administration on Aging (AoA) has determined that for Title III-E, the actual family caregiver is the client, not the older person receiving the services. Iowa NAPIS (National Aging Program Information System) collects and reports Title III-E service/performance data and related program management information to the federal and state government in a format like the other Title III services. The major shift in reporting relates to who is the client. As a result, this Title III-E Client/Service Unit Report shows the number of caregivers who receive services and the number of units by service category from the Title III-E funding of the Older Americans Act, the AoA, and limited state general fund dollars. Additionally, it shows the number of persons served by individual services and total "unduplicated" client count across all services. In other words, if you add the total number of clients (caregivers) from all services, it is higher than the actual number of persons served across all services because some people need and receive more than one service. (Please note: this is preliminary data, and may be subject to change.) Title III-E Report YTD 1st Quarter 2007 Title III-E Report YTD 2nd Quarter 2007 Title III-E Report YTD 3rd Quarter 2007 Title III-E Report YTD 4th Quarter 2007