Hematological and phagocytic response of the fat snook, Centropomus parallelus, reared in net cages, before and after inoculation with Sacharomyces ceresivisiae

The aim of this study was to examine the blood and the macrophagocytic response of fat snook of Centropomus parallelus before and after injection with Saccharomyces cerevisiae. Ten adults were used, caught using net cages in the lagoon-estuarine region of Cananéia (SP), Brazil. The fi sh were anesthetized and blood was drawn followed by inoculation with yeast. After 8 hours, the fi sh were again removed from the cages and anesthetized. A new sample of blood was collected and the animals were then sacrifi ced by deep sedation. The blood was used for the determination: erythrocyte count, hemoglobin concentration and hematocrit, calculation of Mean Corpuscular Volume and Mean Corpuscular Hemoglobin Concentration, and preparation of smears, utilized for total and diff erential leukocyte counts white blood cells and thrombocyte count. There was a signifi cant decrease in almost all parameters 8hrs after inoculation (p0.05), with exception of mean corpuscular volume which showed a signifi cant increase (p>0.05). Leukopenia, lymphopenia, neutropenia and monocytosis occurred when comparing the values of the fi rst and second samples, in both inoculated and non inoculated fi sh. With the white blood cells, lymphocytes and neutrophils, values were signifi cantly higher in the inoculated fi sh versus those which were not inoculated, in both blood samplings. The number of thrombocytes

Comparative study on hematological parameters of farmed matrinxã, Brycon amazonicus Spix and Agassiz, 1829 (Characidae: Bryconinae) with others Bryconinae species

The aim of this study was not only to determine the red blood cells parameters, thrombocyte and leukocyte counts in farmed Brycon amazonicus (matrinxã), to compare these parameters among Bryconinae species from literature, and also to investigate the presence of special granulocytic cells in these fish. The results of the blood cells parameters here established for farmed B. amazonicus, a species of great economic importance in Brazilian aquaculture, could help a better understanding of the blood features in natural populations of this Amazon species. Blood parameters varied between Bryconinae species investigated, mainly the red blood cell counts, hemoglobin, hematocrit and mean corpuscular volume (MCV). The presence of the blood granulocytes, neutrophils and heterophils in matrinxã suggest that both leukocytes can be a characteristic for Bryconinae family. Furthermore, it indicates that the existence of special granulocytic cells in the blood of Bryconinae species from literature is an artifact, and this was herein discussed.

O objetivo deste estudo foi determinar os parâmetros eritrocíticos, as contagens de trombócitos e de leucócitos de espécimes de Brycon amazonicus (matrinxã), criados em cativeiro e compará-los com aqueles descritos na literatura para outras espécies de Bryconinae. Além disso, foi ainda investigada a presença de células granulocíticas especiais nestes peixes. Os resultados dos parâmetros sangüíneos apresentados para B. amazonicus podem ajudar a entender melhor as características sangüíneas em população natural desta espécie de grande importância para a aqüicultura brasileira. Os parâmetros sangüíneos das espécies de Bryconinae investigadas apresentaram variação interespecíficas principalmente a contagem de eritrócitos, hemoglobina, hematócrito e volume corpuscular médio (VCM). A presença dos granulócitos sangüíneos, neutrófilos e heterófilos em matrinxã sugere que esta pode ser uma característica das espécies pertencentes à subfamília Bryconinae. Além disso, indica que a existência de células granulocíticas especiais no sangue de espécies de Bryconinae da literatura é um artefato, e isto foi aqui discutido.

Effects of whole-body X-radiation on the neutrophils of the peripheral blood of the primate Cebus apella (weeping capuchin) / Ação dos raios X corpo total sobre os neutrófilos do sangue periférico em primata Cebus apella (macaco prego)

The effects of ionizing radiation on the neutrophils of Primate Cebus apella were studied after whole-body x-radiation to a single exposure of 25.8 mC/kg (100R), Wright"s stained preparations showed changes in the nucleus and the cytoplasm of neutrophils at 1, 3 and 6 days after irradiation. During this period of time, the cytochemical methods revealed a considerable variation in the pattern of distribution of glycogen, sudanophilic and myeloperoxidase positive granules. Under these same experimental conditions the number of caryoschizes increased on the first and third day. On the ninetieth day post exposure, the morphological and cytochemical appearances of neutrophils as well as the number of caryoschizes were similar to the controls.

Amostras de sangue periférico foram obtidas de cinco primatas Cebus apella (macaco prego), antes e após exposição aos raios X corpo inteiro, na dose única de 25,8 mC/kg (100R). Parte das amostras foi utilizada para a contagem global de cariosquizes e o restante para a realização de extensões sanguíneas e submetidas à coloração de Wright c aos seguintes métodos citoquímicos: ácido periódico Schiff (PAS) para a identificação de glicogênio, Sudan black B para a detecção de fosfolipídios e o-toluidina-água oxigenada para a demonstração da mieloperoxidase. Com o método de Wright foram observadas aos 1, 3 e 6 dias após exposição à radiação, alterações nucleares e citoplasmáticas. Após aplicação dos métodos citoquímicos acima referidos, foram observados, de modo geral, nos mesmos períodos de tempo após irradiação: alteração no padrão de distribuição dos grânulos de glicogênio, grânulos mieloperoxidase positivos e sudanófilos de neutrófilos. No que diz respeito a cariosquizes, constatou-se um aumento dos mesmos após 1 dia, persistindo até o 3º. dia após irradiação. Noventa dias após, não foi observada nenhuma alteração acima referida.

Hematological studies in Oreochromis niloticus (Linnaeus, 1758) (Cichlidae, Teleostei) - Part I / Estudos hematológicos em Oreochromis niloticus (Linnaeus, 1758) (Cichlidae, Teleostei) - Parte I

Hemogram and cell morphology of peripheric blood samples obtained from 10 Oreochromis niloticus fishes have been evaluated. Some of these samples have been used in the accomplishment of hematimetry: eritrocytes count (x = 2.35 x 106/mm3 ±0.12), hemoblobin rate ( x = 7.04 g/dL ± 0.38), hematocrit (x = 27.85% ± 1.62), MHC (x = 30.31 pg ± 1.64), MCV (x = 118.6 p3 ± 3.53), MCHC (x = 25.78% ± 1.72), total leucocytes count (x = 16.08 x 103/mm3 ± 1.28), trombocytes count ( x = 61.69 x 103/mm3 ± 5.96). Morphological evaluation of blood cells was performed by means blood smears extension submitted to Wright staining. Both nucleated eritrocytes and trombocytes presented an elliptical shape; neutrophiles and eosinophiles were spherical with spherical nucleus presenting different sizes, they also showed profuse citoplasms which were slightly basophilic and highly acidophilous, respectively. Polimorphonuclear shapes in these cells have not been verified. Basophiles have shown spherical nucleus and metachromic granulations. Monocytes as well as lymphocytes resembled morphologically those of mammals.

Avaliou-se o hemograma e a morfologia celular em amostras de sangue periférico obtidas de 10 peixes da espécie Oreochromis niloticus. Parte das mesmas foi utilizada para o estudo da hematimetria, isto é,  contagem de eritrócitos (x = 2,35 x 106/mm3 ± 0,12), taxa de hemoglobina, (x = 7,04 g/dL ± 0,38), hematócrito (x = 27,85% ± 1,62), HCM (x = 30,31pg ± 1,64), VCM (x = 118,6p3 ± 3,53), CHCM (x = 25,78% ± 1,72), contagem global de leucócitos (x = 16,08 x 103/mm3 ± 1,28), contagem de trombócitos (x = 61,69 x 103/mm3 ± 5,96), sendo a avaliação da morfologia das células do sangue reallizada através do estudo de extensões sangüíneas submetidas à coloração de Wright. Os eritrócitos e trombócitos nucleados apresentaram-se elípticos; neutrófilos e eosinófilos esféricos de tamanho variável, com o núcleo também esférico, apresentaram citoplasmas abundantes, ligeiramente basófilo e altamente acidófilo, respectivamente. Não foram vistas as formas polimorfonucleares dessas células. Os basófilos apresentaram núcleo esférico e granuiações metacromáticas. Os monócitos e os linfócitos assemelharam-se morfologicamente aos dos mamíferos.

Cytochemical aspects of the peripheral blood cells of Oreochromis (Tilapia) niloticus. (Linnaeus, 1758) (Cichlidae, Teleostei): part II / Aspectos citoquímicos das células do sangue periférico de Oreochromis (Tilapia) niloticus. (Linnaeus, 1758) (Cichlidae, Teleostei): parte II

Morphologicaly, seven types of cells were identified in the blood of Oreochromis niloticus: erythrocytes, thrombocytes, neutrophils, eosinophils, basophils, lymphocytes and monocytes. Glycogen was present not only in the cytoplasm of neutrophils and thrombocytes but also in some lymphocytes and monocytes. The positive reaction for myeloperoxidase and Sudan black was observed in neutrophils and eosinophils. The bromphenol blue method was strongly positive for erythrocytes and eosinophils.

Morfologicamente foram identificados no sangue de Oreochromis niloticus sete tipos de células: eritrócitos, trombócitos, neutrófilos, eosinófilos, basófilos, linfócitos e monócitos. Em relação aos resultados citoquímicos foi contastada a presença de glicogênio em neutrófilos, trombócitos e em alguns linfócitos e monócitos. Os grânulos citoplasmáticos de neutrófilos e eosinófilos mostraram positividade para mieloperoxidade e Sudan black. O azul de bromofenol foi totalmente positivo em eritrócitos e eosinófilos.

Hematological and phagocytic response of the fat snook, Centropomus parallelus, reared in net cages, before and after inoculation with Sacharomyces ceresivisiae

The aim of this study was to examine the blood and the macrophagocytic response of fat snook of Centropomus parallelus before and after injection with Saccharomyces cerevisiae. Ten adults were used, caught using net cages in the lagoon-estuarine region of Cananéia (SP), Brazil. The fi sh were anesthetized and blood was drawn followed by inoculation with yeast. After 8 hours, the fi sh were again removed from the cages and anesthetized. A new sample of blood was collected and the animals were then sacrifi ced by deep sedation. The blood was used for the determination: erythrocyte count, hemoglobin concentration and hematocrit, calculation of Mean Corpuscular Volume and Mean Corpuscular Hemoglobin Concentration, and preparation of smears, utilized for total and diff erential leukocyte counts white blood cells and thrombocyte count. There was a signifi cant decrease in almost all parameters 8hrs after inoculation (p0.05), with exception of mean corpuscular volume which showed a signifi cant increase (p>0.05). Leukopenia, lymphopenia, neutropenia and monocytosis occurred when comparing the values of the fi rst and second samples, in both inoculated and non inoculated fi sh. With the white blood cells, lymphocytes and neutrophils, values were signifi cantly higher in the inoculated fi sh versus those which were not inoculated, in both blood samplings. The number of thrombocytes

Hematological values and morpho-cytochemical blood cells identification of tick parasited capybaras (Hydrochoerus hydrochoeris) and capybaras free of parasitism - DOI: 10.4025/actascianimsci.v25i1.2116 / Valores hematológicos e identificação morfo-citoquímica de células sangüíneas de capivaras (Hydrochoerus hydrochoeris) parasitadas por carrapatos e capivaras livres de infestação - DOI: 10.4025/actascianimsci.v25i1.2116

Blood samples were collected from thirty seven adult parasited capybaras and twenty one free of parasitism aiming the characterization of different circulating cell types and complete hemogram. After a morphological analysis, the blood cells were identified as heterophils, eosinophils, basophils, lymphocytes, monocytes and platelets. The PAS reaction revealed glycogen in heterophils and platelets cytoplasm. A positive reaction was found only in heterophils round granules and in all cytoplasmic granules of eosinophils for the demonstration of myeloperoxidase activity and lipids. The bromofenol blue method revealed strong positivity in heterophils, eosinophils, basophils granules and red blood cells. A positive reaction for alkaline phosphatase was observed in eosinophils and heterophils. The blood parameters studied showed statistic differences (p 0,05) between non- parasited capybaras and parasited capybaras in the red blood cell count (3,13±0.31 x 106/µL and 2,81±0,62 x 106/µL) , haematocrit (48.14±4.75% and 41,22±6.21%) and heterophils (39,38±11,02% and 16,14±7,13%) /eosinophils (8,57±3,78% and 21,92±10,24%) in differential count. In this case the ticks involved in the parasitism of these capybaras were identified as Amblyomma cajenense and Amblyomma cooperi. These data showed that the highly infested capybaras presented some anemia and a remarkable eosinophilia.

Amostras de sangue foram colhidas de 37 capivaras parasitadas por carrapatos e de 21 capivaras livres de infestação para a identificação dos diferentes tipos celulares circulantes e para realização de hemograma. Após análise morfológica, as células sangüíneas foram identificadas como heterófilos, eosinófilos, basófilos, linfócitos, monócitos e plaquetas. A reação de PAS demonstrou glicogênio no citoplasma dos heterófilos e plaquetas. Reação positiva para mieloperoxidase e lipídeos foi demonstrada apenas nos grânulos citoplasmáticos esféricos dos heterófilos e em todos os grânulos citoplasmáticos dos eosinófilos. O método do azul de bromofenol revelou reação fortemente positiva nos grânulos de heterófilos, eosinófilos, basófilos e nas hemácias. Reação positiva para fosfatase alcalina foi observada nos heterófilos e eosinófilos. Os valores hematimétricos que mostraram diferenças estatisticamente significantes (p 0,05), quando comparados aos animais parasitados com aqueles livres de infestação, foram: contagem total de hemácias (3,13±0.31 x 106/µL e 2,81±0,62 x 106/µL), hematócrito (48.14±4.75% e 41,22±6.21%), e, na contagem diferencial, os heterófilos (39,38±11,02% e 16,14±7,13%) e, eosinófilos (8,57±3,78% and 21,92±10,24%). Os carrapatos foram identificados como Amblyomma cajenense and Amblyomma cooperi. As capivaras altamente infestadas por esses carrapatos apresentaram ane

Hematological values and morpho-cytochemical blood cells identification of tick parasited capybaras (Hydrochoerus hydrochoeris) and capybaras free of parasitism - DOI: 10.4025/actascianimsci.v25i1.2116 / Valores hematológicos e identificação morfo-citoquímica de células sangüíneas de capivaras (Hydrochoerus hydrochoeris) parasitadas por carrapatos e capivaras livres de infestação - DOI: 10.4025/actascianimsci.v25i1.2116

Blood samples were collected from thirty seven adult parasited capybaras and twenty one free of parasitism aiming the characterization of different circulating cell types and complete hemogram. After a morphological analysis, the blood cells were identified as heterophils, eosinophils, basophils, lymphocytes, monocytes and platelets. The PAS reaction revealed glycogen in heterophils and platelets cytoplasm. A positive reaction was found only in heterophils round granules and in all cytoplasmic granules of eosinophils for the demonstration of myeloperoxidase activity and lipids. The bromofenol blue method revealed strong positivity in heterophils, eosinophils, basophils granules and red blood cells. A positive reaction for alkaline phosphatase was observed in eosinophils and heterophils. The blood parameters studied showed statistic differences (p 0,05) between non- parasited capybaras and parasited capybaras in the red blood cell count (3,13±0.31 x 106/µL and 2,81±0,62 x 106/µL) , haematocrit (48.14±4.75% and 41,22±6.21%) and heterophils (39,38±11,02% and 16,14±7,13%) /eosinophils (8,57±3,78% and 21,92±10,24%) in differential count. In this case the ticks involved in the parasitism of these capybaras were identified as Amblyomma cajenense and Amblyomma cooperi. These data showed that the highly infested capybaras presented some anemia and a remarkable eosinophilia.

Amostras de sangue foram colhidas de 37 capivaras parasitadas por carrapatos e de 21 capivaras livres de infestação para a identificação dos diferentes tipos celulares circulantes e para realização de hemograma. Após análise morfológica, as células sangüíneas foram identificadas como heterófilos, eosinófilos, basófilos, linfócitos, monócitos e plaquetas. A reação de PAS demonstrou glicogênio no citoplasma dos heterófilos e plaquetas. Reação positiva para mieloperoxidase e lipídeos foi demonstrada apenas nos grânulos citoplasmáticos esféricos dos heterófilos e em todos os grânulos citoplasmáticos dos eosinófilos. O método do azul de bromofenol revelou reação fortemente positiva nos grânulos de heterófilos, eosinófilos, basófilos e nas hemácias. Reação positiva para fosfatase alcalina foi observada nos heterófilos e eosinófilos. Os valores hematimétricos que mostraram diferenças estatisticamente significantes (p 0,05), quando comparados aos animais parasitados com aqueles livres de infestação, foram: contagem total de hemácias (3,13±0.31 x 106/µL e 2,81±0,62 x 106/µL), hematócrito (48.14±4.75% e 41,22±6.21%), e, na contagem diferencial, os heterófilos (39,38±11,02% e 16,14±7,13%) e, eosinófilos (8,57±3,78% and 21,92±10,24%). Os carrapatos foram identificados como Amblyomma cajenense and Amblyomma cooperi. As capivaras altamente infestadas por esses carrapatos apresentaram ane