Morphological Features of Trypanosomes from Squirrel Monkeys from the Brazilian Amazon

Ziccardi, Mariangela; Lourenço‐de‐Oliveira, Ricardo

doi:10.1590/s0074-02761998000100010

Cited by 12 publications

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“…Similar observations were made by Chagas (1909) and Hoare (1972) when they described the trypomastigote forms of T. cruzi, which also presented morphometric variation in total length [16.3-21.8 µm according to Hoare (1972)]. Pleomorphism in T. rangeli, Trypanosoma minasense and Trypanosoma saimirii was also observed by Ziccardi and Lourenço-de-Oliveira (1998) in primates of the Brazilian Amazon. Factors such as host species and stage of infection, as well as the Trypanosoma strain involved, may influence the occurrence of this variation (Brener and Chiari, 1965;Andrade, 1974;Urdaneta-Morales, 1983).…”

Section: Discussionsupporting

confidence: 78%

Trypanosoma rhipicephalis sp. nov. (Protozoa: Kinetoplastida) isolated from Rhipicephalus microplus (Acari: Ixodidae) ticks in Rio de Janeiro, Brazil

et al. 2018

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Parasites of the genusTrypanosomaare unicellular flagellated microorganisms of theTrypanosomatidae. This study describes an isolate of the genusTrypanosomanaturally infectingRhipicephalus microplusticks, characterized through molecular, morphological and biological analysis. Trypanosome cultures, designated strain P1RJ, were obtained by isolation fromR. microplushaemolymph in cultures of the tick cell line IDE8. After isolation, strain P1RJ grew well axenically in L15B medium at temperatures of 30, 32 and 34 °C. The new trypanosome remained stable in axenic culture over 14 passages in L15B at 30 °C and was successfully cryopreserved and resuscitated. Morphometric analysis was performed on randomly selected developmental forms. 18S rRNA and 24Sα rDNA sequence analyses confirmed that strain P1RJ is a new species of the genusTrypanosoma. The nucleotide sequences described were submitted to Genbank. Pathogenicity, involvement in vertebrate hosts, epidemiology, developmental cycle and transmission mechanisms of strain P1RJ are still unknown. Therefore, more studies will be necessary to determine life cycle aspects of this trypanosome, for which we propose the nameTrypanosoma rhipicephalissp. nov.

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Section: Discussionsupporting

confidence: 78%

Trypanosoma rhipicephalis sp. nov. (Protozoa: Kinetoplastida) isolated from Rhipicephalus microplus (Acari: Ixodidae) ticks in Rio de Janeiro, Brazil

et al. 2018

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“…In the experimental marmoset (No. 71) and squirrel monkey (B9) the blood trypomastigotes of T. minasense could be misidentified, for instance, with T. saimirii Rodhain (Ziccardi & Lourenço-de-Oliveira 1998). The results of the present paper strengthen our hypothesis that Rodhain (1937aRodhain ( ,b, 1941 was dealing with mixed infection (T. minasense + T. rangeli) when he described T. saimirii and that T. saimirii is a junior synonym of T. rangeli (Ziccardi & Lourenço-de-Oliveira 1998).…”

Section: Discussionsupporting

confidence: 66%

“…Rodhain (1937a) found blood trypanosomes similar to T. minasense in Saimiri sciureus, which were smaller than the typical T. minasense of marmosets (Carini 1909). Later, Rodhain (1937bRodhain ( , 1941, prompted by some biological differences, decided to describe the squirrel monkey's parasite as a new species, T. (Herpetosoma) saimirii, which recently was considered a synonym of T. (Tejeraia) rangeli (Ziccardi & Lourenço-de-Oliveira 1998). This paper describes experimental infections of both S. sciureus and C. penicillata by T. minasense and the morphological variations of blood trypomastigotes of this parasite with respect to hosts and time of infection.…”

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confidence: 98%

“…Trypanosoma (Megatrypanum) minasense Chagas has been detected in 32 species or subspecies of neotropical non-human primates, mostly in small monkeys (Cebidae), marmosets and tamarins (Callithrichidae), from Panama to southeastern Brazil (Carini 1909, Deane & Damasceno 1961, Dunn et al 1963, Deane 1979, Resende et al 1994, Ziccardi & Lourenço-de-Oliveira 1998.…”

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confidence: 99%

“…Several authors have noticed that blood trypomastigotes of T. minasense display a degree of morphological variation that makes their identification difficult or doubtful (Deane & Damasceno 1961, Dunn et al 1963, Ziccardi & Lourenço-de-Oliveira 1998. Indeed, the range of measurable attributes of blood trypomastigotes of T. minasense in naturally infected monkeys and marmosets has led some authors to think that the extremes would correspond to distinct species.…”

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confidence: 99%

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Polymorphism in Trypomastigotes of Trypanosoma (Megatrypanum) minasense in the blood of experimentally infected squirrel monkey and marmosets

Ziccardi¹,

Lourenço‐de‐Oliveira²

1999

Mem. Inst. Oswaldo Cruz

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Molecular Epidemiology of Trypanosomatids and Trypanosoma cruzi in Primates from Peru

Aysanoa

Mayor

Mendoza³

et al. 2017

EcoHealth

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We determined the prevalence rate and risk of infection of Trypanosoma cruzi and other trypanosomatids in Peruvian non-human primates (NHPs) in the wild (n = 126) and in different captive conditions (n = 183). Blood samples were collected on filter paper, FTA cards, or EDTA tubes and tested using a nested PCR protocol targeting the 24Sα rRNA gene. Main risk factors associated with trypanosomatid and T. cruzi infection were genus and the human–animal context (wild vs captive animals). Wild NHPs had higher prevalence of both trypanosomatids (64.3 vs 27.9%, P < 0.001) and T. cruzi (8.7 vs 3.3%, P = 0.057), compared to captive NHPs, suggesting that parasite transmission in NHPs occurs more actively in the sylvatic cycle. In terms of primate family, Pitheciidae had the highest trypanosomatid prevalence (20/22, 90.9%) and Cebidae had the highest T. cruzi prevalence (15/117, 12.8%). T. cruzi and trypanosomatids are common in Peruvian NHPs and could pose a health risk to human and animals that has not been properly studied.

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Morphological Features of Trypanosomes from Squirrel Monkeys from the Brazilian Amazon

Abstract: A morphometric analysis of blood trypomastigotes identified as

Cited by 12 publications

References 15 publications

Trypanosoma rhipicephalis sp. nov. (Protozoa: Kinetoplastida) isolated from Rhipicephalus microplus (Acari: Ixodidae) ticks in Rio de Janeiro, Brazil

Trypanosoma rhipicephalis sp. nov. (Protozoa: Kinetoplastida) isolated from Rhipicephalus microplus (Acari: Ixodidae) ticks in Rio de Janeiro, Brazil

Polymorphism in Trypomastigotes of Trypanosoma (Megatrypanum) minasense in the blood of experimentally infected squirrel monkey and marmosets

Molecular Epidemiology of Trypanosomatids and Trypanosoma cruzi in Primates from Peru

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