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Hepatozoon pyramidumi sp. n. (Apicomplexa: Adeleorina) from the blood of Echis pyramidum: morphology and SSU rDNA sequence / Hepatozoon pyramidumi sp. n. (Apicomplexa: Adeleorina) do sangue de Echis pyramidum: morfologia e sequência de SSU rDNA
Mansour, Lamjed; Abdel-Haleem, Heba Mohamed; Department of BiologyAl-Malki, Esam Sharf; Al-Quraishy, Saleh; Abdel-Baki, Abdel-Azeem Shaban.
  • Mansour, Lamjed; King Saud University. College of Science. Zoology Department. Riyadh. SA
  • Abdel-Haleem, Heba Mohamed; Beni-Suef University. Faculty of Science. Zoology Department. Beni-Suef. EG
  • Department of BiologyAl-Malki, Esam Sharf; Majmaah University. College of Sciences. Department of BiologyAl-Malki, Esam Sharf. Majmaah. SA
  • Al-Quraishy, Saleh; King Saud University. College of Science. Zoology Department. Riyadh. SA
  • Abdel-Baki, Abdel-Azeem Shaban; Beni-Suef University. Faculty of Science. Zoology Department. Beni-Suef. EG
Rev. bras. parasitol. vet ; 29(2): e002420, 2020. graf
Article in English | LILACS | ID: biblio-1138064
ABSTRACT
Abstract Hepatozoon pyramidumi sp. n. is described from the blood of the Egyptian saw-scaled viper, Echis pyramidum, captured from Saudi Arabia. Five out of ten viper specimens examined (50%) were found infected with Hepatozoon pyramidumi sp. n. with parasitaemia level ranged from 20-30%. The infection was restricted only to the erythrocytes. Two morphologically different forms of intraerythrocytic stages were observed; small and mature gamonts. The small ganomt with average size of 10.7 × 3.5 μm. Mature gamont was sausage-shaped with recurved poles measuring 16.3 × 4.2 μm in average size. Infected erythrocytes were hypertrophied; their nuclei were deformed and sometimes displaced from their central position in the normal uninfected cell. Merogonic stages were observed in the lung endothelial cell and the liver parenchyma cells. Mature meront was 17.8 × 13.6 µm and contained banana-shaped merozoites with average size of ~15 × 2 µm. Phylogenetic analysis based on the SSU rDNA sequence clustered Hepatozoon pyramidumi sp. n with previously sequenced Hepatozoon spp., most of them infected reptilian hosts without geographic consideration. The morphological and molecular comparison with closely related species proved the taxonomic uniqueness and novelty of the present form.
RESUMO
Resumo Hepatozoon pyramidumi sp. n. é descrito a partir do sangue da víbora em escamas e quilhas serrilhadas, Echis pyramidum, capturada na Arábia Saudita. Cinco de dez espécimes de víbora examinadas (50%) foram encontradas infectadas com Hepatozoon pyramidumi sp. n. com nível de parasitemia de 20% a 30%. A infecção foi restrita apenas aos eritrócitos. Foram observadas duas formas morfologicamente diferentes de estágios intra-eritrocíticos gamontes de tamanho pequeno e madura. As formas menores de gamontes apresentaram média de 10,7 × 3,5 μm. Os gamontes maduros apresentaram forma de salsicha, com pequenos polos recurvados, medindo 16,3 × 4,2 μm, em média. Os eritrócitos infectados estavam aumentados de tamanho; seus núcleos encontravam-se deformados e, algumas vezes, deslocados de sua posição central, quando comparados às células normais não-infectadas. Foram observados estágios merogônicos em células endoteliais pulmonares e nas células do parênquima hepático. Os merontes maduros apresentavam 17,8 × 13,6 µm e continham merozoítos em forma de banana com tamanho médio de ~ 15 × 2 µm. A análise filogenética baseada nas sequências SSU rDNA agrupou Hepatozoon pyramidumi sp. n com Hepatozoon spp. detectados em répteis de várias regiões geográficas. Por meio de análises morfológicas e moleculares com espécies intimamente relacionadas, demonstrou-se a singularidade dessa nova espécie de Hepatozoon.
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Full text: Available Index: LILACS (Americas) Main subject: DNA, Protozoan / Apicomplexa / Viperidae Limits: Animals Country/Region as subject: Asia Language: English Journal: Rev. bras. parasitol. vet Journal subject: Veterinary Medicine / Parasitology Year: 2020 Type: Article Affiliation country: Egypt / Saudi Arabia Institution/Affiliation country: Beni-Suef University/EG / King Saud University/SA / Majmaah University/SA

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Full text: Available Index: LILACS (Americas) Main subject: DNA, Protozoan / Apicomplexa / Viperidae Limits: Animals Country/Region as subject: Asia Language: English Journal: Rev. bras. parasitol. vet Journal subject: Veterinary Medicine / Parasitology Year: 2020 Type: Article Affiliation country: Egypt / Saudi Arabia Institution/Affiliation country: Beni-Suef University/EG / King Saud University/SA / Majmaah University/SA