Ralph Lainson

Summary

Affiliation: Instituto Evandro Chagas
Country: Brazil

Publications

  1. ncbi request reprint Parasites of the squirrel Sciurus spadiceus (Rodentia: Sciuridae) from Amazonian Brasil, with particular reference to Eimeria damnosa n. sp. (Apicompiexa: Eimeriidae)
    R Lainson
    Department of Parasitology, Instituto Evandro Chagas, Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Parasite 12:305-15. 2005
  2. ncbi request reprint Eimeria lepidosirenis n.sp. (Apicomplexa:Eimeriidae) of the South American lungfish Lepidosiren paradoxa (Osteichthyes:Dipnoi) from Amazonian Brazil
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, 66090 000, Brasil
    Mem Inst Oswaldo Cruz 101:327-9. 2006
  3. ncbi request reprint The genus Cyclospora (Apicomplexa: Eimeriidae), with a description of Cyclospora schneideri n.sp. in the snake Anilius scytale scytale (Aniliidae) from Amazonian Brazil--a review
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante Barroso 492, 66090 000 Belém, PA, Brasil
    Mem Inst Oswaldo Cruz 100:103-10. 2005
  4. ncbi request reprint Blood and intestinal parasites of squirrels (Rodentia: Sciuridae) in Amazonian Brazil
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante Barroso 492, 66090 000 Belém, PA, Brazil
    Mem Inst Oswaldo Cruz 99:577-9. 2004
  5. ncbi request reprint Theileria electrophorin.sp., a parasite of the electric eel Electrophorus electricus (Osteichthyes: Cypriniformes: Gymnotidae) from Amazonian Brazil
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, Brasil
    Mem Inst Oswaldo Cruz 102:155-7. 2007
  6. ncbi request reprint Observations on Eimeria species of Dasyprocta leporina (Linnaeus, 1758)(Rodentia: Dasyproctidae) from the state of Pará, North Brazil
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, Brasil
    Mem Inst Oswaldo Cruz 102:183-9. 2007
  7. ncbi request reprint Haematozoan parasites of the lizard Ameiva ameiva (Teiidae) from Amazonian Brazil: a preliminary note
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante Barroso 492, 66090 000 Belém, PA, Brasil
    Mem Inst Oswaldo Cruz 98:1067-70. 2003
  8. ncbi request reprint Some coccidial parasites of the lizard Amphisbaena alba (Reptilia: Amphisbaenia: Amphisbaenidae)
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, 66090 000, Brasil
    Mem Inst Oswaldo Cruz 98:927-36. 2003
  9. ncbi request reprint Natural and experimental infection of the lizard Ameiva ameiva with Hemolivia stellata (Adeleina: Haemogregarinidae) of the toad Bufo marinus
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Parasite 14:323-8. 2007
  10. ncbi request reprint Development of Hepatozoon caimani (Carini, 1909) Pess a, De Biasi & De Souza, 1972 in the Caiman Caiman c. crocodilus, the frog Rana catesbeiana and the mosquito Culex fatigans
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, 66090 000, Belem, Para, Brasil
    Mem Inst Oswaldo Cruz 98:103-13. 2003

Collaborators

Detail Information

Publications37

  1. ncbi request reprint Parasites of the squirrel Sciurus spadiceus (Rodentia: Sciuridae) from Amazonian Brasil, with particular reference to Eimeria damnosa n. sp. (Apicompiexa: Eimeriidae)
    R Lainson
    Department of Parasitology, Instituto Evandro Chagas, Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Parasite 12:305-15. 2005
    ..Three animals were with a sheathed microfilaria in the peripheral blood and liver smears. Finally, a Trypanosoma cruzi-like trypanosome was isolated from the blood of one squirrel and a T. lewisi-like trypanosome from two others...
  2. ncbi request reprint Eimeria lepidosirenis n.sp. (Apicomplexa:Eimeriidae) of the South American lungfish Lepidosiren paradoxa (Osteichthyes:Dipnoi) from Amazonian Brazil
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, 66090 000, Brasil
    Mem Inst Oswaldo Cruz 101:327-9. 2006
    ..Site of development in the host uncertain: no evidence of endogenous stages was found in fresh scrapings and stained smears of the intestinal epithelium...
  3. ncbi request reprint The genus Cyclospora (Apicomplexa: Eimeriidae), with a description of Cyclospora schneideri n.sp. in the snake Anilius scytale scytale (Aniliidae) from Amazonian Brazil--a review
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante Barroso 492, 66090 000 Belém, PA, Brasil
    Mem Inst Oswaldo Cruz 100:103-10. 2005
    ..3 x 8.3-15.1 x 9.9), shape-index 1.4 (1.2-1.5) with an inconspicuous Stieda body. Sporozoites 11-13 x 2.5-3. Endogenous stages are intracytoplasmic in the epithelial cells of the small intestine and with the characters of the Eimeriorina...
  4. ncbi request reprint Blood and intestinal parasites of squirrels (Rodentia: Sciuridae) in Amazonian Brazil
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante Barroso 492, 66090 000 Belém, PA, Brazil
    Mem Inst Oswaldo Cruz 99:577-9. 2004
    ..were detected in the faeces of 10 animals (83.3%). The parasite develops in the epithelial cells of the intestine, where it may cause severe damage and sometimes results in death of the animal. No oocysts were detected in bile...
  5. ncbi request reprint Theileria electrophorin.sp., a parasite of the electric eel Electrophorus electricus (Osteichthyes: Cypriniformes: Gymnotidae) from Amazonian Brazil
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, Brasil
    Mem Inst Oswaldo Cruz 102:155-7. 2007
    ..This appears to be the second report of Theileria Bettencourt, Franca and Borges, 1907 in a fish...
  6. ncbi request reprint Observations on Eimeria species of Dasyprocta leporina (Linnaeus, 1758)(Rodentia: Dasyproctidae) from the state of Pará, North Brazil
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, Brasil
    Mem Inst Oswaldo Cruz 102:183-9. 2007
    ..paraensis) of a single parasite. Location of an endogenous site of development for E. paraensis that is distinctly separate from that of E. cotiae might establish more definitely the separate specific status of the two parasites...
  7. ncbi request reprint Haematozoan parasites of the lizard Ameiva ameiva (Teiidae) from Amazonian Brazil: a preliminary note
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante Barroso 492, 66090 000 Belém, PA, Brasil
    Mem Inst Oswaldo Cruz 98:1067-70. 2003
    ..Concomitant infections with a Plasmodium tropiduri-like malaria parasite were seen and were sometimes extremely heavy...
  8. ncbi request reprint Some coccidial parasites of the lizard Amphisbaena alba (Reptilia: Amphisbaenia: Amphisbaenidae)
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, 66090 000, Brasil
    Mem Inst Oswaldo Cruz 98:927-36. 2003
    ..alba measured 105 x 85 m and contained many hundreds of merozoites. A stained kidney smear of the same lizard revealed the presence of an unidentified parasite producing multinucleate cyst-like stages...
  9. ncbi request reprint Natural and experimental infection of the lizard Ameiva ameiva with Hemolivia stellata (Adeleina: Haemogregarinidae) of the toad Bufo marinus
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Parasite 14:323-8. 2007
    ..ameiva and pieces of liver containing tissuecysts from the same lizard. The remarkable lack of host specificity shown by H. stellata, in hosts so widely separated as an amphibian and a reptile, is discussed...
  10. ncbi request reprint Development of Hepatozoon caimani (Carini, 1909) Pess a, De Biasi & De Souza, 1972 in the Caiman Caiman c. crocodilus, the frog Rana catesbeiana and the mosquito Culex fatigans
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, 66090 000, Belem, Para, Brasil
    Mem Inst Oswaldo Cruz 98:103-13. 2003
    ..The finding of similar cysts containing cystozoites in the semi-aquatic lizard Neusticurus bicarinatus, experimentally fed with infected C. fatigans, suggests that other secondary hosts may be involved...
  11. ncbi request reprint American visceral leishmaniasis: wild animal hosts
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Avenida Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Trans R Soc Trop Med Hyg 96:630-1. 2002
    ..We have detected no infection in laboratory-bred specimens of another species, P. guyannensis, after their inoculation with promastigotes or amastigotes of this parasite from Amazonian Brazil...
  12. ncbi request reprint Trypanosoma (Megatrypanum) saloboense n. sp. (Kinetoplastida: Trypanosomatidae) parasite of Monodelphis emiliae (Marsupiala: Didelphidae) from Amazonian Brazil
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Parasite 15:99-103. 2008
    ..emiliae, or in laboratory mice inoculated with epimastigotes from a blood-agar culture. No division stages could be detected in the internal organs or the peripheral blood...
  13. ncbi request reprint New species of Eimeria and Isospora (Protozoa: Eimeriidae) in Geochelone spp. (Chelonia: Testudinidae) from Amazonian Brazil
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante, Barroso 492, Bairro Marco, 66090 000 Belém, Para, Brasil
    Parasite 15:531-8. 2008
    ..Eimeria motelo Hůrková et al., 2000, previously described in Geochelone denticulata from Peru, is here recorded in the some chelonid from Amazonian Brazil...
  14. ncbi request reprint Plasmodium carmelinoi n. sp. (Haemosporida: Plasmodiidae) of the lizard Ameiva ameiva (Squamata: Teiidae) in Amazonian Brazil
    R Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Avenida Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Parasite 17:129-32. 2010
    ..2 females. Prevalence of infection was low (5%) but, due to the very low parasitaemia which may result in a failure to detect parasites, it is probably higher than this...
  15. ncbi request reprint Lutzomyia longipalpis and the eco-epidemiology of American visceral leishmaniasis, with particular reference to Brazil: a review
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, Brazil
    Mem Inst Oswaldo Cruz 100:811-27. 2005
    ..Although effective control measures in foci of the disease will diminish the number of canine and human infections, the presence of such an enzootic in a variety of native animals will render the total eradication of AVL unlikely...
  16. doi request reprint Further evidences on a new diagnostic approach for monitoring human Leishmania (L.) infantum chagasi infection in Amazonian Brazil
    Fernando Tobias Silveira
    Parasitology Department, Evandro Chagas Institute Surveillance Secretary of Health, Ministry of Health, Belem, Para, Brazil
    Parasitol Res 106:377-86. 2010
    ..These results provided the conclusion that this diagnostic approach may be useful for monitoring human L. (L.) i. chagasi infection in endemic area and preventing the high morbidity of severe AVL cases...
  17. doi request reprint A prospective study on the dynamics of the clinical and immunological evolution of human Leishmania (L.) infantum chagasi infection in the Brazilian Amazon region
    Fernando T Silveira
    Parasitology Department, Evandro Chagas Institute Surveillance Secretary of Health, Ministry of Health, Avenida Almirante Barroso, 492, 66090 000, Belem, PA, Brazil
    Trans R Soc Trop Med Hyg 104:529-35. 2010
    ....
  18. doi request reprint A cross-sectional study on the clinical and immunological spectrum of human Leishmania (L.) infantum chagasi infection in the Brazilian Amazon region
    José Angelo B Crescente
    Tropical Medicine Institute, Para Federal University, Belem, PA, Brazil
    Trans R Soc Trop Med Hyg 103:1250-6. 2009
    ..4%; subclinical resistant infection (SRI) 15%; subclinical oligosymptomatic infection (SOI) 3%; symptomatic infection (AVL) 3% and indeterminate initial infection (III) 5%...
  19. ncbi request reprint Canine visceral leishmaniasis due to Leishmania (L.) infantum chagasi in Amazonian Brazil: comparison of the parasite density from the skin, lymph node and visceral tissues between symptomatic and asymptomatic, seropositive dogs
    Luciana Vieira R Lima
    Departamento de Parasitologia, Instituto Evandro Chagas, Ananindeua, Para, Brasil
    Rev Inst Med Trop Sao Paulo 52:259-66. 2010
    ..05) parasite density from skin (10.7/mm² x 15.5/mm²), the place where the vetor L. longipalpis takes its blood meal, compared with those from lymph node (6.3/mm² x 8.3/mm²) and viscera (1.4/mm²x 5.3/mm²)...
  20. doi request reprint A longitudinal study on the transmission dynamics of human Leishmania (Leishmania) infantum chagasi infection in Amazonian Brazil, with special reference to its prevalence and incidence
    Fernando T Silveira
    Parasitology Department, Evandro Chagas Institute Surveillance Secretary of Health, Ministry of Health, Av Almirante Barroso, 492, 66090 000, Belem, Pará State, Brazil
    Parasitol Res 104:559-67. 2009
    ..The combined tests diagnosed a total of 231 cases of infection leading to an accumulated prevalence of 24.4%...
  21. ncbi request reprint Ultrastructural study of the gametocytes and merogonic stages of Fallisia audaciosa (Haemosporina: Garniidae) that infect neutrophils of the lizard Plica umbra (Reptilia: Iguanidae)
    Edilene O Silva
    Laboratorio de Parasitologia, Departamento de Patologia, Centro de Ciencias Biologicas, Universidade Federal do Para, Av Augusto Corrêa s n, Bairro Guamá, 66075 110 Belem, Para, Brazil
    Protist 157:13-9. 2006
    ..The unusual presence of a parasitic protozoan within neutrophils, in some way interfering with or modulating the microbicidal activity of such cells, is discussed...
  22. doi request reprint Reviewing the role of the dendritic Langerhans cells in the immunopathogenesis of American cutaneous leishmaniasis
    Fernando T Silveira
    Parasitology Department, Evandro Chagas Institute, Avenida Almirante Barroso, 492, 66090 000, Belem, Pará State, Brazil
    Trans R Soc Trop Med Hyg 102:1075-80. 2008
    ..These are probably the main immunological mechanisms of LCs regarding the immune response dichotomy that modulates infection outcome by these Leishmania parasites...
  23. ncbi request reprint Intestinal coccidia (Apicomplexa: Eimeriidae) of Brazilian lizards. Eimeria carmelinoi n.sp., from Kentropyx calcarata and Acroeimeria paraensis n.sp. from Cnemidophorus lemniscatus lemniscatus (Lacertilia: Teiidae)
    Ralph Lainson
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, 66090 000, Brasil
    Mem Inst Oswaldo Cruz 97:227-37. 2002
    ..Sporocysts 9 x 8, without a Stieda body. Endogenous stages epicytoplasmic, characteristic of the genus, in the upper ileum. The importance of a study of the endogenous stages of eimeriid coccidia is discussed...
  24. doi request reprint In vitro infectivity of species of Leishmania (Viannia) responsible for American cutaneous leishmaniasis
    Marliane Batista Campos
    Evandro Chagas Institute Surveillance Secretary of Health, Ministry of Health, Belem, Pará State, Brazil
    Parasitol Res 103:771-6. 2008
    ..11 microM). These results demonstrated a negative correlation between the infectivity and the ability of these parasites to escape from the microbicidal activity of the host cell...
  25. ncbi request reprint Further observations on clinical, histopathological, and immunological features of borderline disseminated cutaneous leishmaniasis caused by Leishmania (Leishmania) amazonensis
    Fernando T Silveira
    Departamento de Parasitologia, Instituto Evandro Chagas, Belem, PA, 66090 000, Brazil
    Mem Inst Oswaldo Cruz 100:525-34. 2005
    ..BDCL shows clinical and histopathological features which are different from those of both LCL and ADCL, and there is a good prognosis of cure which is generally not so in the case of frank ADCL...
  26. ncbi request reprint Clinical and immunopathological spectrum of American cutaneous leishmaniasis with special reference to the disease in Amazonian Brazil: a review
    Fernando T Silveira
    Departamento de Parasitologia, Instituto Evandro Chagas, Secretaria de Vigilância em Saúde, Ministerio da Saude, Belem, PA, 66090 000, Brasil
    Mem Inst Oswaldo Cruz 99:239-51. 2004
    ....
  27. ncbi request reprint Ultrastructural aspects of Fallisia effusa (Haemosporina: Garniidae) in thrombocytes of the lizard Neusticurus bicarinatus (Reptilia: Teiidae)
    Edilene O Silva
    Laboratorio de Parasitologia, Departamento de Patologia, Centro de Ciencias Biologicas, Universidade Federal do Para, Av Augusto Corrêa s n, Bairro Guamá, 66075 110 Belem, Para, Brazil
    Protist 156:35-43. 2005
    ..These observations confirm that Fallisia effusa displays characteristic features distinguishing it from other members of the Haemosporidian families, and that it has the ability to modulate microtubule assembly...
  28. ncbi request reprint Plasmodium kentropyxi n.sp. (Apicomplexa: Haemosporina: Plasmodiidae) and a Plasmodium tropiduri-like parasite in the lizard Kentropyx calcarata (Lacertilia: Teiidae) in north Brazil
    R Lainson
    Department of Parasitology, Instituto Evandro Chagas, Avenida Almirante Barroso 492, , , Brazil
    Parasite 8:107-13. 2001
    ..calcarata possessed small rounded or fan-shaped meronts producing from 4-14 merozoites, and spherical to subspherical gametocytes of approximately 6.0 x 5.0 microns. The parasite was consistently polar in its position in the erythrocyte...
  29. ncbi request reprint Some observations on the fine structure of trophozoites of the haemogregarine Cyrilia lignieresi (Adeleina: Haemogregarinidae) in erythrocytes of the fish Synbranchus marmoratus (Synbranchidae)
    J A Diniz
    Unidade de Microscopia Eletrônica, Instituto Evandro Chagas, Av Almirante Barroso 492, Bairro Marco, 66090 000 Belém, Para, Brazil
    Parasitol Res 88:593-7. 2002
    ..Secondly, some of the dense bodies, which are usually spherical organelles, may appear as elongated structures. Thirdly, peculiar invaginations of the inner membrane appear to divide the parasite into compartments...
  30. ncbi request reprint Leishmania (Viannia) utingensis n. sp., a parasite from the sandfly Lutzomyia (Viannamyia) tuberculata in Amazonian Brazil
    R R Braga
    Departamento de Parasitologia, Instituto Evandro Chagas, Av Almirante Barroso 492, 66090 000 Belém, Para, Brazil
    Parasite 10:111-8. 2003
    ..It is described here under the name of Leishmania (Viannia) utingensis n. sp...
  31. ncbi request reprint An outbreak of cutaneous leishmaniasis among soldiers in Belém, Pará State, Brazil, caused by Leishmania (Viannia) lindenbergi n. sp. A new leishmanial parasite of man in the Amazon region
    F T Silveira
    Departamento de Parasitologia, Instituto Evandro Chagas FNS, Caixa Postal 1128, Belem, Para, Brazil
    Parasite 9:43-50. 2002
    ..V.) lindenbergi is discussed: by far the most abundant anthropophilic sandfly in the type locality was identified as Lutzomyia (Nyssomyia) antunesi (Coutinho), and this remains high on the list of possible vectors...
  32. doi request reprint Immunopathogenic competences of Leishmania (V.) braziliensis and L. (L.) amazonensis in American cutaneous leishmaniasis
    F T Silveira
    Parasitology Department, Evandro Chagas Institute Surveillance Secretary of Health, Ministry of Health, 66090 000, Belem, Pará State, Brazil
    Parasite Immunol 31:423-31. 2009
    ..These are probably the main immunopathogenic competences of L. (V.) braziliensis and L. (L.) amazonensis regarding the immune response dichotomy that modulates human infection outcome by these Leishmania parasites...
  33. ncbi request reprint Leishmania (Viannia) shawi sp. n., a parasite of monkeys, sloths and procyonids in Amazonian Brazil
    R Lainson
    Wellcome Parasitology Unit, Para, Brazil
    Ann Parasitol Hum Comp 64:200-7. 1989
    ....
  34. ncbi request reprint Blood monocyte alteration caused by a hematozoan infection in the lizard Ameiva ameiva (Reptilia: Teiidae)
    Edilene O Silva
    Laboratorio de Parasitologia, Departamento de Patologia, Centro de Ciencias Biologicas, Universidade Federal do Para, Av Augusto Corrêa s n, Bairro Guamá, 66075 110, Belem, Brazil
    Parasitol Res 93:448-56. 2004
    ..These observations indicate that this infection alters the physiological state of the host and suggest that this parasite has the ability to modify monocyte vimentin assembly...
  35. ncbi request reprint Lutzomyia (Nyssomyia) whitmani s.l . (Antunes & Coutinho, 1939)(Diptera: Psychodidae: Phlebotominae): geographical distribution and the epidemiology of American cutaneous leishmaniasis in Brazil--mini-review
    Simone M da Costa
    Laboratório de Transmissores de Leishmanioses, Departamento de Entomologia, Instituto Oswaldo Cruz, Escola Nacional de Saúde Pública FIOCRUZ, Av Brasil 4365, 21045 900 Rio de Janeiro, Brasil
    Mem Inst Oswaldo Cruz 102:149-53. 2007
    ..l. has been found in association with a variety of vegetation types, including the Amazonian forest, savanna ("campos cerrados"), and northeastern savanna ("caatingas nordestinas" or "savana estépica")...
  36. ncbi request reprint Fine structure of erythrocytic stages of a Plasmodium tropiduri-like malaria parasite found in the lizard Kentropyx calcarata (Teiidae) from north Brazil
    Ilan Paperna
    Department of Animal Sciences, Faculty of Agriculture of the Hebrew University of Jerusalem, Rehovot, Israel
    Folia Parasitol (Praha) 49:2-8. 2002
    ..The microgametocyte contains an electron-dense aggregate, and the macrogametocyte has a large mitochondrion and a complex of tubuli and cisternae. These features are compared with those described in other malarial parasites...
  37. ncbi request reprint Comparative studies of populations of Lutzomyia umbratilis (Diptera: Psychodidae) in Brazil and Venezuela
    Alfredo C R Azevedo
    Departamento de Entomologia, Fundacao Oswaldo Cruz, Rio de Janeiro, Brasil
    J Med Entomol 39:587-600. 2002
    ..When the Student-Newman-Keuls test was applied, no pattern was found that could separate them. However, in part, the phenetic analysis showed some evidences of heterogeneity in MT population...