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Lima IS, Solcá MS, Tafuri WL, de Freitas LAR, Dos-Santos WLC. Assessment of histological liver alterations in dogs naturally infected with Leishmania infantum. Parasit Vectors 2019; 12:487. [PMID: 31619264 PMCID: PMC6796381 DOI: 10.1186/s13071-019-3723-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Accepted: 09/16/2019] [Indexed: 01/19/2023] Open
Abstract
Background The liver plays a central role in the development of canine visceral leishmaniasis. Studies of natural infection in animals and humans indicate a direct relationship between resolution of infection and the formation and maturation of granulomas in the liver. However, in contrast to other reports in the literature, the present study found no differences in the characteristics of hepatic granulomas that could be related to resistance or susceptibility to Leishmania. Here, we describe the hepatic alterations observed in dogs with differing clinical manifestations of visceral leishmaniasis in an endemic area in the state of Bahia, Brazil. Methods We examined 148 animals in an endemic area. The animals were clinically examined, and the infection was determined by ELISA, spleen aspirate culture and quantitative PCR. The animals were grouped into asymptomatic or symptomatic based on the number of signs of LV. The histological liver evaluation was performed in a blinded way. Results Our results indicated no association between the characteristics of granulomas and clinical presentation. We found an association between the intensity of this inflammatory response and parasite load in the animals’ spleens. It is important to note that while hepatic alterations, such as portal and perivascular inflammation and the presence of larger amounts of granulomas, were linked with higher parasite loads, we found the inverse to be true with respect to intrasinusoidal lymphocytosis, the formation of intrasinusoidal inflammatory cell aggregates and Kupffer cell hypertrophy. Conclusions Our findings suggest that the presence of mononuclear inflammatory cells inside the sinusoids is more important than that of organized granulomas in terms of the containment of parasitism by the host. We suggest that the presence of granulomas indicates the failure of a first line of defense mechanism in the control of parasite infection, which could be related to the presence of inflammatory cells and Kupffer cell hypertrophy inside the sinusoids. We further demonstrated that dogs with active Leishmania spp. infection present a higher frequency of inflammatory changes in the liver. In addition to being correlated with the severity of clinical manifestation, these hepatic alterations were also associated with changes in hematological and biochemical parameters.
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Affiliation(s)
- Isadora S Lima
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, BA, Brazil.
| | - Manuela S Solcá
- Instituto Gonçalo Moniz, Fundação Oswaldo Cruz, Salvador, BA, Brazil
| | - Wagner L Tafuri
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
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Shahbazi M, Zahedifard F, Saljoughian N, Doroud D, Jamshidi S, Mahdavi N, Shirian S, Daneshbod Y, Hamid Zarkesh-Esfahani S, Papadopoulou B, Rafati S. Immunological comparison of DNA vaccination using two delivery systems against canine leishmaniasis. Vet Parasitol 2015; 212:130-9. [PMID: 26255093 DOI: 10.1016/j.vetpar.2015.07.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 06/30/2015] [Accepted: 07/04/2015] [Indexed: 12/01/2022]
Abstract
Visceral leishmaniasis (VL) is a fatal disease caused by the intracellular protozoan parasite Leishmania infantum. Dogs are the primary reservoirs of this parasite, and vaccination of dogs could be an effective method to reduce its transfer to humans. In order to develop a vaccine against VL (apart from the choice of immunogenic candidate antigens), it is necessary to use an appropriate delivery system to promote a proper antigen-specific immune response. In this study, we compared two vaccine delivery systems, namely electroporation and cationic solid-lipid nanoparticle (cSLN) formulation, to administer a DNA vaccine containing the Leishmania donovani A2 antigen, and L. infantum cysteine proteinases of type I (CPA) and II (CPB) without its unusual C-terminal extension. The protective potencies of these two vaccine delivery systems were evaluated against L. infantum challenge in outbred dogs. Our results show that the administration of pcDNA-A2-CPA-CPB(-CTE)GFP vaccine as a prime-boost by either electroporation or cSLN formulation protects the dogs against L. infantum infection. Partial protection in vaccinated dogs is associated with significantly (p<0.05) higher levels of IgG2, IFN-γ, and TNF-α and with low levels of IgG1 and IL-10 as compared to the control group. Protection was also correlated with a low parasite burden and a strong delayed-type hypersensitivity (DTH) response. This study demonstrates that both electroporation and cSLN formulation can be used as efficient vaccine delivery systems against visceral leishmaniasis.
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Affiliation(s)
- Mehdi Shahbazi
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran; Department of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, 69, Pasteur Ave., Tehran 13164, Iran
| | - Farnaz Zahedifard
- Department of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, 69, Pasteur Ave., Tehran 13164, Iran
| | - Noushin Saljoughian
- Department of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, 69, Pasteur Ave., Tehran 13164, Iran
| | - Delaram Doroud
- Department of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, 69, Pasteur Ave., Tehran 13164, Iran
| | - Shahram Jamshidi
- Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Niousha Mahdavi
- Department of Internal Medicine, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Sadegh Shirian
- Department of Molecular and Cytopathology, Daneshbod Pathology Laboratory, Shiraz, Iran
| | - Yahya Daneshbod
- Department of Molecular and Cytopathology, Daneshbod Pathology Laboratory, Shiraz, Iran
| | | | - Barbara Papadopoulou
- Research Centre in Infectious Disease, CHU de Québec Research Centre and Department of Microbiology, Infectious Disease and Immunology, Laval University, Quebec, Canada
| | - Sima Rafati
- Department of Immunotherapy and Leishmania Vaccine Research, Pasteur Institute of Iran, 69, Pasteur Ave., Tehran 13164, Iran.
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Bruno B, Maurella C, Falco S, Tarducci A, Zanatta R, D'Angelo A, Borrelli A. Thromboelastometric evaluation of hemostasis in dogs infected withLeishmania infantum. J Vet Emerg Crit Care (San Antonio) 2015; 25:502-11. [DOI: 10.1111/vec.12325] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 10/25/2013] [Accepted: 04/14/2015] [Indexed: 12/01/2022]
Affiliation(s)
- Barbara Bruno
- Department of Veterinary Science; Clinical Medicine Section; via Leonardo da Vinci 44 10095 Grugliasco (TO) Italy
| | - Cristiana Maurella
- the Istituto Zooprofilattico Sperimentale del Piemonte; Liguria e Valle D'Aosta (Maurella); via Bologna 148 10154 Torino Italy
| | - Sara Falco
- Department of Veterinary Science; Clinical Medicine Section; via Leonardo da Vinci 44 10095 Grugliasco (TO) Italy
| | - Alberto Tarducci
- Department of Veterinary Science; Clinical Medicine Section; via Leonardo da Vinci 44 10095 Grugliasco (TO) Italy
| | - Renato Zanatta
- Department of Veterinary Science; Clinical Medicine Section; via Leonardo da Vinci 44 10095 Grugliasco (TO) Italy
| | - Antonio D'Angelo
- Department of Veterinary Science; Clinical Medicine Section; via Leonardo da Vinci 44 10095 Grugliasco (TO) Italy
| | - Antonio Borrelli
- Department of Veterinary Science; Clinical Medicine Section; via Leonardo da Vinci 44 10095 Grugliasco (TO) Italy
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Honse CO, Figueiredo FB, de Alencar NX, Madeira MDF, Gremião IDF, Schubach TMP. Disseminated intravascular coagulation in a dog naturally infected by Leishmania (Leishmania) chagasi from Rio de Janeiro - Brazil. BMC Vet Res 2013; 9:43. [PMID: 23497531 PMCID: PMC3599858 DOI: 10.1186/1746-6148-9-43] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 02/09/2013] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Disseminated intravascular coagulation (DIC) is an acquired disorder characterized by the activation of intravascular coagulation and excessive fibrin formation. It always occurs in association with other clinical conditions, including parasitic diseases. DIC has been described as a unusual complication in human and canine visceral leishmaniasis. CASE PRESENTATION DIC was found in a seven-year-old male mongrel dog naturally infected by Leishmania (Leishmania) chagasi. Haemostasis parameters demonstrated changes in primary and secondary haemostasis and fibrinolysis. CONCLUSION DIC is a unusual condition described in canine visceral leishmaniasis and it seems to be associated with several immunological and pathological mechanisms involved in the disease.
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Affiliation(s)
- Carla O Honse
- Laboratório de Pesquisa Clínica em Dermatozoonoses em Animais Domésticos, Instituto de Pesquisa Clínica Evandro Chagas, Fundação Oswaldo Cruz (Fiocruz), Av, Brasil, 4365, Manguinhos, Rio de Janeiro 21045-900, Brasil.
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Aresu L, Benali S, Ferro S, Vittone V, Gallo E, Brovida C, Castagnaro M. Light and Electron Microscopic Analysis of Consecutive Renal Biopsy Specimens From Leishmania-Seropositive Dogs. Vet Pathol 2012; 50:753-60. [DOI: 10.1177/0300985812459336] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Canine visceral leishmaniasis frequently causes renal damage that leads to chronic kidney disease. Fifteen dogs seropositive for Leishmania were selected and biopsied before (T0) and 60 days later after (T1) treatment with a specific anti- Leishmania pharmacological agent. Various parameters were selected for evaluating the glomerular and tubulointerstitial damage. At T0, mesangioproliferative and membranoproliferative glomerulonephritis were observed in 6 dogs, chronic glomerulosclerosis in 5, and end-stage kidney in 3; renal tissue from 1 dog was within normal histologic limits. The most frequently observed ultrastructural changes were foot-process effacement, thickening of the basement membranes, and immune deposits. One dog had mesangial immune deposits at T1 that had not been present at T0, so the diagnosis was changed to mesangioproliferative glomerulonephritis. In dogs with end-stage kidney, the number of obsolescent glomeruli and cystic atrophied glomeruli was increased at T1. However, progression of the glomerular lesions was minimal in most dogs. Worsening of tubulointerstitial scores was evident in the dogs with the most severe lesions at the first biopsy. Progression of the tubulointerstitial damage was minimal in the mildly affected dogs, and the interstitial inflammation was abated. In conclusion, renal lesions can progress over a 60-day period in canine leishmaniasis. A longer period between the renal biopsies would be necessary to demonstrate more severe changes. In addition a specific anti- Leishmania treatment could have a significant effect in the early stages of the disease.
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Affiliation(s)
- L. Aresu
- Dipartimento di Biomedicina comparata e Alimentazione, Facoltà di Medicina Veterinaria, Università di Padova, Viale dell’università, Legnaro, Italy
| | - S. Benali
- Dipartimento di Biomedicina comparata e Alimentazione, Facoltà di Medicina Veterinaria, Università di Padova, Viale dell’università, Legnaro, Italy
| | - S. Ferro
- Dipartimento di Biomedicina comparata e Alimentazione, Facoltà di Medicina Veterinaria, Università di Padova, Viale dell’università, Legnaro, Italy
| | - V. Vittone
- BiEsseA s.r.l. Via Amedeo D’Aosta, Milano, Italy
| | - E. Gallo
- Dipartimento di Biomedicina comparata e Alimentazione, Facoltà di Medicina Veterinaria, Università di Padova, Viale dell’università, Legnaro, Italy
| | - C. Brovida
- Ospedale veterinario ANUBI Strada Genova, Moncalieri, Italy
| | - M. Castagnaro
- Dipartimento di Biomedicina comparata e Alimentazione, Facoltà di Medicina Veterinaria, Università di Padova, Viale dell’università, Legnaro, Italy
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Quiñonez-Díaz L, Mancilla-Ramírez J, Avila-García M, Ortiz-Avalos J, Berron A, González S, Paredes Y, Galindo-Sevilla N. Effect of ambient temperature on the clinical manifestations of experimental diffuse cutaneous leishmaniasis in a rodent model. Vector Borne Zoonotic Dis 2012; 12:851-60. [PMID: 22651383 DOI: 10.1089/vbz.2011.0844] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Dermal species of Leishmania have a relatively broad temperature range for optimal growth in vitro, with temperature differences accompanied by a form change. This suggests that when the host is living in moderate temperatures (22°C), infection may proceed at temperatures lower than those that occur in tropical regions (32°C), and a different clinical expression of the disease due to a different parasitic form may result. The aim of this study was to investigate the effect of environmental temperature on the clinical expression of the disease. BALB/C mice infected with Leishmania mexicana were housed at 32°±2°C or 22°±1°C, and assessed for the development of inflammation and the presence of parasites in organs using PCR and immunohistology. The clinical expression of leishmaniasis at 32°C included inflammation at the site of inoculation with swelling of the nose and tail, whereas at 22°C, up to 50% of the infected mice developed dry exfoliative dermatitis with alopecia on the dorsum. In both cases, parasite colonization was confirmed in the skin, with parasites at more external locations at 22°C. Parasite visceralization was confirmed in all internal organs and glands in both cases based on PCR and immunohistology. In conclusion, the clinical expression of diffuse leishmaniasis by Leishmania mexicana in laboratory mice is modified by temperature, from nodular inflammation at 32°C, to dry exfoliative dermatitis and alopecia at 22°C, with parasite visceralization in both cases.
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Affiliation(s)
- Laura Quiñonez-Díaz
- Centro de Investigación, División Académica de Ciencias de la Salud, Universidad Juárez Autónoma de Tabasco, Villahermosa, Tabasco, México
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Pelagalli A, Ciaramella P, Lombardi P, Pero ME, Cortese L, Corona M, Oliva G, Avallone L. Evaluation of adenosine 5'-diphosphate (ADP)- and collagen-induced platelet aggregation in canine leishmaniasis. J Comp Pathol 2004; 130:124-9. [PMID: 15003469 DOI: 10.1016/j.jcpa.2003.09.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2003] [Accepted: 09/26/2003] [Indexed: 11/29/2022]
Abstract
Leishmania-infected dogs, which represent an important reservoir of infection in many parts of the world, frequently suffer from haematological disorders, including thrombocytopenia. In this study, the ability of platelets from healthy (control) dogs (n = 11) and from dogs with naturally acquired clinical leishmaniasis (n = 24) to aggregate in the presence of two different agonists (adenosine 5'-diphosphate [ADP] and collagen) was assayed. Haematological parameters examined consisted of the platelet count, prothrombin time, activated partial thromboplastin time (aPTT), fibrinogen concentration and D-dimer concentration. In dogs with leishmaniasis, a significant decrease in ADP- and collagen-induced platelet aggregation was observed. Compared with platelets from the control dogs, those from leishmania-infected dogs showed a higher sensitivity to collagen, as demonstrated by a reduction in platelet aggregation of up to 20.4%, and a significant (P < 0.0001) difference for all the doses tested. With ADP the reduction was up to 10.4%, the difference reaching a significant level of P < 0.0001 only at the maximum dose used. The nature of this response, which was not accompanied by any clinical signs of bleeding other than an increase in aPTT, emphasizes the role of platelets in the parasite-host cell interaction.
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Affiliation(s)
- A Pelagalli
- Dipartimento di Strutture, Funzioni e Tecnologie Biologiche, University of Napoli, Federico II, 80137 Napoli, Italy
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Travi BL, Ferro C, Cadena H, Montoya-Lerma J, Adler GH. Canine visceral leishmaniasis: dog infectivity to sand flies from non-endemic areas. Res Vet Sci 2002; 72:83-6. [PMID: 12002643 DOI: 10.1053/rvsc.2001.0527] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Canine visceral leishmaniasis (VL), caused by Leishmania infantum (Leishmania chagasi in the New World), is a zoonotic, endemic disease in Western Europe and Latin America. The potential spreading to new regions was suggested by the appearance of canine VL among foxhounds in the US. Although the sand fly vectors in the major foci of transmission have been described, no information exists on other sand flies that could propagate the infection outside endemic areas. We evaluated the capacity of Lutzomyia shannoni (Dyar) and Lutomyia youngi (Feliciangeli & Murillo), which are widely distributed in the New World, to acquire L chagasi (Cunha and Chagas) infections. A high proportion of L youngi were infected after feeding on an oligosymptomatic dog (51 per cent) or a polysymptomatic individual (95 per cent), but the intensity of infection was low (< 200 promastigotes/fly). L shannoni became infected only by feeding on the polysymptomatic dog, and the infection rate was lower (9 per cent) than in Lutzomyia longipalpis (36 per cent), and Lutzomyia evansi (Nunez-Tovar) (Lutz and Neiva) (38 per cent), but the intensity of infection (200 to > 500 promastigotes/fly) was comparable (L longipalpis) or higher (L evansi) than in the New World vectors. It is hypothesised that the presence of infected dogs in areas where L shannoni or L youngi occur could initiate new endemic cycles of VL in both South and North America.
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Affiliation(s)
- B L Travi
- Centro Internacional de Entrenamiento e Investigaciones Médicas CIDEIM, Cali, Colombia.
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Owens SD, Oakley DA, Marryott K, Hatchett W, Walton R, Nolan TJ, Newton A, Steurer F, Schantz P, Giger U. Transmission of visceral leishmaniasis through blood transfusions from infected English foxhounds to anemic dogs. J Am Vet Med Assoc 2001; 219:1076-83. [PMID: 11700704 DOI: 10.2460/javma.2001.219.1076] [Citation(s) in RCA: 110] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To conduct serologic surveillance for Leishmania spp in English foxhounds from a kennel, as well as recipients of blood from these dogs, and determine whether L infantum organisms could be transmitted via blood transfusion. DESIGN Serologic prevalence survey. ANIMALS 120 English foxhounds and 51 dogs of various breeds receiving blood from these donors. PROCEDURE Foxhound blood donors, foxhound nondonors, and nonfoxhound blood recipient dogs were evaluated serologically for Leishmania spp by indirect fluorescent antibody testing. Dogs that received packed RBC (PRBC) transfusions from foxhound donors from mid-1996 through mid-2000 were identified. Furthermore, dogs were serologically evaluated if they had received fresh frozen plasma (FFP) transfusions in 1999 and 2000 from seropositive foxhound blood donors. RESULTS Thirty percent of the English Foxhounds were seropositive for Leishmania spp (titer > or = 1:16), although the degree of seropositivity varied considerably during the period. Furthermore, 57 foxhounds had been used as donors from 1996 to 2000, and 342 units of PRBC had been transfused to at least 227 patients. All 25 dogs screened that received PRBC from seronegative foxhound donors tested negative, whereas 3 of 7 dogs that received PRBC from seropositive donors tested positive. All 9 dogs that received FFP from seropositive foxhound donors remained seronegative. CONCLUSIONS AND CLINICAL RELEVANCE To our knowledge, this report documents the first transmission of Leishmania spp by blood transfusion. The use of foxhounds as blood donors may not be advisable in North America.
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Affiliation(s)
- S D Owens
- Penn Animal Blood Bank, Department of Clinical Studies, School of Veterinary Medicine, University of Pennsylvania, Philadelphia 19104-6010, USA
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Abstract
Secondary haemostasis was evaluated in 26 dogs with leishmaniasis and 10 normal dogs by measurements of modified one-stage prothrombin time (m-OSPT), activated partial thromboplastin time (APTT), thrombin time, fibrinogen concentration and fibrin degradation products. There were no significant differences between the groups in the m-OSPT, fibrinogen concentration, or levels of fibrin degradation products. The APTT was significantly (P = 0.006) longer in the infected dogs than in the control group, and in infected dogs with alanine aminotransferase (ALT) activities > 50 U/litre. There was a significant linear regression between ALT and APTT. Thrombin time was significantly (P = 0.003) longer in the infected dogs than in the normal dogs. There were no significant differences between the thrombin times of sick dogs with different levels of creatinine or activities of ALT, or between male and female dogs, whether diseased or normal.
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Abstract
Primary haemostasis was evaluated by measurements of bleeding time and platelet count in 26 dogs with leishmaniasis and 10 normal dogs. Bleeding time was significantly (P = 0.02) longer in the infected dogs than in the control group, and in infected dogs with creatinine concentrations > 1.5 mg/dl than in infected dogs with normal creatinine levels. There was a significant linear regression between the concentration of creatinine and bleeding time (P = 0.02) although the coefficient of determination was low (r2 = 0.194). There were no significant differences in platelet counts between the normal and diseased dogs, and there were no significant differences between male and female dogs in either group.
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Affiliation(s)
- P Moreno
- Department of Clinical Pathology, Veterinary Faculty, Córdoba, Spain
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Abstract
This report contains the clinical, histologic, immunohistochemical, and electron microscopic findings in two cases of equine cutaneous leishmaniasis. Nodular, sometimes crusty or ulcerated lesions were confined to the pinna and adjacent neck in both animals. The dermal inflammatory infiltrate was lymphohistiocytic in horse No. 1 and pyogranulomatous with formation of tuberculoid granulomas in horse No. 2. Numerous Leishmania organisms were found within macrophages in both animals. There was moderate to intense and specific reaction by immunoperoxidase using a polyclonal antiserum against Leishmania in both horses. Leishmania amastigotes were also revealed by electron microscopy. This is the first report of equine cutaneous leishmaniasis recognized in North America and Puerto Rico. Leishmaniasis should be considered in the differential diagnosis of cutaneous nodular diseases in the horse.
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Affiliation(s)
- J A Ramos-Vara
- Animal Health Diagnostic Laboratory, College of Veterinary Medicine, Michigan State University, East Lansing 48824, USA
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Ramos-Vara JA, Briones V, Segalés J, Vilafranca M, Sordé A, Miller MA. Concurrent infection with Streptococcus equisimilis and Leishmania in a dog. J Vet Diagn Invest 1994; 6:371-5. [PMID: 7948211 DOI: 10.1177/104063879400600317] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Affiliation(s)
- J A Ramos-Vara
- Department of Animal Pathology, Veterinary School of Barcelona, Spain
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