A. Choudhury

Bio: A. Choudhury is an academic researcher from University of Calcutta. The author has contributed to research in topic(s): Shrike & Turtle (robot). The author has an hindex of 3, co-authored 8 publication(s) receiving 44 citation(s).

Life histories of three new coccidian parasites from three coleopteran stored-grain pests of India.

Abstract: Summary. Life histories of three new coccidian parasites (Protozoa: Apicomplexa: Coccidia) obtained from the larvae of three different coleopteran stored-grain pests, Tribolium castaneum Herbst, Alphitobius piceus Olivier and Palorus ratzeburgii Wissmann, respectively, have been described in detail. These coccidian parasites belong to the genus Adelina Hesse 1911 and are named as Adelina castana sp. n., Adelina picei sp. n. and Adelina palori sp. n. The complete life histories of these parasites are observed on the fat bodies along with the body fluid of the hosts. A comprehensive comparative account of three life histories is presented in tabular form.

Trypanosoma evansi: Hematologic changes in experimentally infected cats

Abstract: This study aimed at evaluating hemogram and erythropoietic changes in cats experimentally infected with Trypanosoma evansi. Thirteen adult female non-breeding Felix catus were separated into two groups: seven animals were infected with 108 trypomastigotes each, and six animals were used as negative controls. Animals were kept in air-conditioned rooms and blood smears were performed daily for 49 days. Blood samples were collected from the jugular vein at days 0, 7, 21, 35 and 49 and stored in blood-collecting tubes containing anticoagulant. Bone marrow was collected from the proximal epiphysis of the right femur at days 14 and 42 post-inoculation (PI). Total erythrocyte count, hematocrit and hemoglobin showed statistical differences among groups from the seventh day PI onwards (P

Trypanosoma evansi infection in three cats

Abstract: Cet article rapporte trois cas cliniques de trypanosomose a Trypanosoma evansi (« surra ») chez des chats Koweitiens. Les symptomes, les anomalies hematologiques et les resultats du traitement sont decrits.

Diminazene aceturate in the control of Trypanosoma evansi infection in cats.

Abstract: The aim of this study was to investigate the efficacy of diminazene aceturate in the control of the infection by Trypanosoma evansi in cats. Fourteen animals were infected with 10(8) trypomastigote forms each and six were used as negative control (group A). Seven of the infected cats were used as positive control (group B) and seven were treated with diminazene aceturate (3.5 mg kg(-1)) for 5 consecutive days (group C). Biochemical and hematological parameters were evaluated during the experiment. Blood with anticoagulant was collected at day 49 post-inoculation and preserved in ethanol for DNA extraction. Samples were analyzed using PCR T. evansi-specific to assess the effectiveness of treatment. The treatment with diminazene aceturate had an efficacy of 85.7%. Alanine aminotransferase, gamma-glutamyltransferase, urea, and creatinine values remained within the normal physiological range in the treated cats. Hemogram was normalized in all the cured animals. Therefore, the therapy used is effective in controlling T. evansi in cats.

Influence of Trypanosoma evansi in blood, plasma, and brain cholinesterase of experimentally infected cats.

Abstract: Changes in blood, plasma and brain cholinesterase activities in Trypanosoma evansi- infected cats were investigated. Seven animals were infected with 10 8 trypomastigote forms each and six were used as control. Animals were monitored for 56 days by examining daily blood smears. Blood samples were collected at days 28 and 56 post-inoculation to determine the activity of acetylcholinesterase (AChE) in blood and the activity of butyrylcholinesterase (BChE) in plasma. AChE was also evaluated in total brain. The activity of AChE in blood and brain, and the activity of BChE in plasma significantly reduced in the infected cats. Therefore, the infection by T. evansi influenced cholinesterases of felines indicating changes in the responses of the cholinergic system.

Haemogregarines of freshwater turtles from Southeast Asia with a description of Haemogregarina sacaliae sp. n. and a redescription of Haemogregarina pellegrini Laveran and Pettit, 1910

Abstract: The uniform morphology of the developmental stages of Haemogregarina species and the insufficient information supplied by the simplistic descriptions of previous authors complicates their differential diagnosis and proper species identification. In this study, we detected Haemogregarina spp. in 6 out of 22 (27·2%) examined turtles originating from Southeast Asia, Malayemys subtrijuga (n = 4), Sacalia quadriocellata (n = 1) and Platysternon megacephalum (n = 1), and compared them with the available literature data. Microscopic analysis of our isolates distinguished 2 morphological species, Haemogregarina pellegrini and one new species, being described in this paper as Haemogregarina sacaliae sp. n. Phylogenetic analyses based on 1210 bp long fragment of 18S rDNA sequences placed both haemogregarines firmly within the monophyletic Haemogregarina clade. Isolates of H. pellegrini from 2 distantly related turtle hosts, M. subtrijuga and P. megacephalum, were genetically identical. Despite the fact that numerous Haemogregarina species of turtles have been described, the incompleteness of the morphological data and relatively low host specificity provides the space for large synonymy within this taxon. Therefore, a complex approach combining microscopic analyses together with molecular-genetic methods should represent the basic standard for all taxonomic studies.