Trypanosomes of some Fennoscandian birds

Bennett, Gordon F.; Siikamäki, Pirkko; Rätti, Osmo; Allander, Klas; Gustafsson, Lars; Squires-Parsons, Debbie

doi:10.1590/s0074-02761994000400007

Cited by 16 publications

(24 citation statements)

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“…Identification of the haemoproteids was performed using the descriptions published by Valkiūnas (1997). Hepatozoon and Trypanosoma parasites were identified using the descriptions in Bennett et al (1992Bennett et al ( , 1994, respectively.…”

Section: Methodsmentioning

confidence: 99%

Spatial and temporal differences in the blood parasite fauna of passerine birds during the spring migration in Bulgaria

Shurulinkov

Ilieva

2009

Parasitol Res

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Species composition and prevalence of the blood parasites of three migratory Acrocephalus species of warblers (Acrocephalus arundinaceus, Acrocephalus scirpaceus and Acrocephalus schoenobaenus) were studied during spring period in Bulgaria. For each of the studied species, we compared the parasite fauna during their spring migration at three study sites in search of infection patterns in time and space. Spatial differences were registered in the blood parasites and their prevalence for two of the studied species-A. arundinaceus and A. scirpaceus, whereas for the third one-A. schoenobaenus, there were no significant differences. The parasite species Haemoproteus belopolskyi was present in migrating A. arundinaceus only at Kalimok station, but not at the other two sampling locations. Plasmodium prevalence in A. arundinaceus migrating through Kalimok was also different between years. A decrease of H. belopolskyi prevalence was detected for A. schoenobaenus at Petarch during the spring of 2006. On the contrary, Plasmodium (Haemamoeba) sp. infections of the same bird species increased during the spring period. The differences found between sites could be explained with the different origin of the migrants at different migration stopover points. Climatic conditions and vector abundance in the zones of origin are probable reasons for the observed differences between years.

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Section: Methodsmentioning

confidence: 99%

Spatial and temporal differences in the blood parasite fauna of passerine birds during the spring migration in Bulgaria

Shurulinkov

Ilieva

2009

Parasitol Res

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“…1982). However, the legitimacy of many of these species is in doubt since they were described based on the assumption that each trypanosome species is host‐specific (Bennett et al . 1994).…”

Section: Introductionmentioning

confidence: 99%

“…Experimental evidence has shown that one avian trypanosome can be transmitted to a variety of host bird species (Bennett 1961; Woo & Bartlett 1982), thus refuting the host‐species specificity hypothesis. In addition, based on morphological criteria, Bennett et al . (1994) found that many bird species from different families in natural sub‐Saharan populations are infected with trypanosomes that are morphologically indistinguishable.…”

Section: Introductionmentioning

confidence: 99%

“…(1994) found that many bird species from different families in natural sub‐Saharan populations are infected with trypanosomes that are morphologically indistinguishable. However, due to the highly pleiomorphic nature of these protozoa, an accurate morphology‐based classification of Trypanosoma at the species level has proven elusive (Bennett et al . 1994).…”

Section: Introductionmentioning

confidence: 99%

“…In addition, T. avium is designated as one species although it is found in Africa, North America and Europe, and differs substantially in pertinent morphological criteria (Kirkpatrick et al . 1986; Bennett et al . 1994).…”

Section: Introductionmentioning

confidence: 99%

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Host specificity and incidence ofTrypanosomain some African rainforest birds: a molecular approach

2001

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Studies of host-parasite interactions in birds have contributed greatly to our understanding of the evolution and ecology of disease. Here we employ molecular techniques to determine the incidence and study the host-specificity of parasitic trypanosomes in the African avifauna. We developed a polymerase chain reaction (PCR)-based diagnostic test that amplified the small subunit ribosomal RNA gene (SSU rRNA) of Trypanosoma from avian blood samples. This nested PCR assay complements and corroborates information obtained by the traditional method of blood smear analysis. The test was used to describe the incidence of trypanosomes in 479 host individuals representing 71 rainforest bird species from Cameroon, the Ivory Coast and Equatorial Guinea. Forty-two (59%) of these potential host species harboured trypanosomes and 189 individuals (35%) were infected. To examine host and geographical specificity, we examined the morphology and sequenced a portion of the SSU rRNA gene from representative trypanosomes drawn from different hosts and collecting locations. In traditional blood smear analyses we identified two trypanosome morphospecies, T. avium and T. everetti. Our molecular and morphological results were congruent in that these two morphospecies had highly divergent SSU rRNA sequences, but the molecular assay also identified cryptic variation in T. avium, in which we found seven closely allied haplotypes. The pattern of sequence diversity within T. avium provides evidence for widespread trypanosome mixing across avian host taxa and across geographical locations. For example, T. avium lineages with identical haplotypes infected birds from different families, whereas single host species were infected by T. avium lineages with different haplotypes. Furthermore, some conspecific hosts from geographically distant sampling locations were infected with the same trypanosome lineage, but other individuals from those locations harboured different trypanosome lineages. This apparent lack of host or geographical specificity may have important consequences for the evolutionary and ecological interactions between parasitic trypanosomes and their avian hosts.

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Deforestation does not affect the prevalence of a common trypanosome in African birds

2016

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Trypanosomes of some Fennoscandian birds

Cited by 16 publications

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Spatial and temporal differences in the blood parasite fauna of passerine birds during the spring migration in Bulgaria

Spatial and temporal differences in the blood parasite fauna of passerine birds during the spring migration in Bulgaria

Host specificity and incidence ofTrypanosomain some African rainforest birds: a molecular approach

Deforestation does not affect the prevalence of a common trypanosome in African birds

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