scholarly journals Ultrastructural and molecular identification of Sarcocystis tenella (Protozoa, Apicomplexa) in naturally infected Korean native goats

2016 ◽  
Vol 61 (No. 7) ◽  
pp. 374-381 ◽  
Author(s):  
EJ Hong ◽  
C. Sim ◽  
JS Chae ◽  
HC Kim ◽  
J. Park ◽  
...  
Keyword(s):  
Intermediate Host ◽  
Natural Infection ◽  
Low Frequency ◽  
Protozoan Parasite ◽  
First Record ◽  
Capra Hircus ◽  
Histopathological Study ◽  
Electron Microscopic ◽  
The Republic ◽  
Sarcocystis Tenella

Sheep is the intermediate host of the protozoan parasite Sarcocystis tenella, while the dog is its definitive host. This study was conducted to determine the prevalence of natural infection with S. tenella in slaughtered Korean native goat, Capra hircus coreanae, in the Republic of Korea. H-E stained heart tissues were investigated for the presence of sarcocysts. Of the 103 goats, three (2.91%) were diagnosed as positive for S. tenella by light, electron microscopic and molecular examination. The histopathological study showed a low frequency of microscopic Sarcocystis infection in slaughtered goats. In transmission electron microscopy, the sarcocysts were confirmed as S. tenella. Further DNA sequencing and phylogenic analysis support our identification of S. tenella with a 18S rRNA sequence identity of 100% between the experimental sequence and S. tenella. To our knowledge, this is the first record of S. tenella in Korean native goats from Korea. We thus report that the domestic goat is another intermediate host for S. tenella.

First record of the Glossy Ibis(Plegadis falcinellus) in the Republic of Korea

2019 ◽  
Vol 26 (1) ◽  
pp. 26-28
Author(s):  
Chang Wan Kang ◽  
Eum Mi Kim ◽  
Jin Young Park ◽  
Hwa-Jung Kim ◽  
Jae Woong Hwang ◽  
...  
Keyword(s):  
First Record ◽  
Republic Of Korea ◽  
The Republic

Temperature, Mitochondria, and Reye's Syndrome

PEDIATRICS ◽  
1983 ◽  
Vol 71 (6) ◽  
pp. 985-985
Author(s):  
RIF S. EL-MALLAKH
Keyword(s):  
Trypanosoma Cruzi ◽  
Chagas Disease ◽  
Protozoan Parasite ◽  
Mitochondrial Enzyme ◽  
Reye's Syndrome ◽  
Electron Microscopic ◽  
Microscopic Studies ◽  
Mitochondrial Defect ◽  
Intracellular Protozoan Parasite

To the Editor.— Mitochondrial failure, manifest by changes in mitochondrial enzyme activity1-3 and morphology,4-5 is central to Reye's syndrome (RS).6 Although it has been variously hypothesized that the mitochondrial changes are secondary to an exogenous toxin,7-12 or an intrinsic mitochondrial defect,6 the actual cause remains obscure. Electron microscopic studies have shown sweelling and loss of cristate in mitochondria of patients with RS. It is interesting that very similar changes occur in Trypanosoma cruzi.13-16 T cruzi is an extracellular/intracellular protozoan parasite which causes Chagas' disease.17

scholarly journals The first record of the invasive mosquito species Aedes albopictus in Chişinӑu, Republic of Moldova, 2020

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Tatiana Șuleșco ◽  
Galina Bușmachiu ◽  
Unchana Lange ◽  
Jonas Schmidt-Chanasit ◽  
Renke Lühken
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
First Record ◽  
Botanical Garden ◽  
Border Crossing ◽  
Molecular Barcoding ◽  
Republic Of Moldova ◽  
International Airport ◽  
Action Project ◽  
The Republic

Abstract Background In Europe, Aedes albopictus is an important vector of chikungunya virus and Dirofilaria nematodes and has been involved in local autochthonous circulation of dengue and Zika viruses. Due to the ongoing spread, targeted field surveillance at potential points of entry of invasive Aedes mosquitoes was initiated by the Republic of Moldova in 2020 as part of the transboundary “Invasive Aedes Mosquitoes COST-Action project.” Methods In 2020, ovitraps were positioned at each of three locations: the border crossing to Romania in Leuşeni (Hancesti region), Chişinӑu International Airport and Chişinӑu Botanical Garden. Results A total of 188 Aedes spp. eggs were collected at the Chişinӑu International Airport between August and September 2020. Twenty-three adults reared in the laboratory were identified morphologically as Ae. albopictus (Skuse, 1895), and 12 selected specimens were confirmed by molecular barcoding of the cytochrome oxidase subunit I gene region. In addition, one adult Ae. albopictus female at the same site was caught with a manual aspirator. Conclusions This is the first documented report of Ae. albopictus in the Republic of Moldova. The presence of immature and adult stages indicates the local reproduction of the species in the country. Therefore, it is crucial to extend and strengthen surveillance of the invasive Aedes mosquitoes to prevent Ae. albopictus and other exotic mosquito species from becoming established in the Republic of Moldova. Graphical abstract

scholarly journals Evidence of Neospora caninum exposure among native Korean goats (Capra hircus coreanae)

2014 ◽  
Vol 59 (No. 12) ◽  
pp. 637-640 ◽  
Author(s):  
BY Jung ◽  
SH Lee ◽  
D. Kwak
Keyword(s):  
Neospora Caninum ◽  
Control Strategies ◽  
Integrated Control ◽  
Protozoan Parasite ◽  
Capra Hircus ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serum Samples ◽  
Caninum Infection ◽  
One Year ◽  
And Control

Neospora caninum is a protozoan parasite that causes abortion in ruminants, including goats. The objective of the present study was to determine the seroprevalence of N. caninum in native Korean goats (Capra hircus coreanae). A commercial enzyme-linked immunosorbent assay kit was used to analyse 464 serum samples for the presence of N. caninum antibodies. Four samples (0.9%, 95% confidence intervals – CI: 0.0–1.7) were found to be positive for N. caninum antibodies. The seroprevalence was analysed according to age (less than to one year, young; more than or equal one year, adult; and unknown), sampling season (April to September, warm; October to March, cold), and region (northern, central, and southern). However, there were no statistically significant differences in seroprevalence according to age, season, and region (P > 0.05). This is the first report on the seroprevalence of N. caninum in native Korean goats. The results of this study indicate a nationwide distribution of N. caninum among goats, with a relatively low prevalence. Therefore, the implementation of integrated control strategies as well as measures for prevention and control of N. caninum infection among goats is recommended.

First record of the Dollman’s tree mouse (Prionomys batesi; Mammalia: Nesomyidae) in the Republic of Congo and additional description of this rare Central African rodent

Zootaxa ◽  
2006 ◽  
Vol 1318 (1) ◽  
pp. 59
Author(s):  
CHRISTIANE DENYS ◽  
MARC COLYN ◽  
VIOLAINE NICOLAS
Keyword(s):  
National Park ◽  
Central African Republic ◽  
Intraspecific Variability ◽  
First Record ◽  
Morphological Description ◽  
Republic Of Congo ◽  
The Republic ◽  
First Time

We present new data on the poorly known rodent Prionomys batesi Dollman, 1910. Recently, five specimens of this species were collected in Odzala National Park, which represent the first record of this species in Republic of Congo. These new captures, combined with the preparation of 15 specimens from Central African Republic allowed us to complete the morphological description of the species as well as, for the first time, to document intraspecific variability. This species is actually known from three countries (Cameroon, Central African Republic and Republic of Congo) and four localities (Bitye, Obala, La Maboké and Odzala). It seems to be restricted to areas of forest-savannah mosaic where the forest is actually colonising the savannah.

scholarly journals Unusual Kinetic and Structural Properties Control Rapid Assembly and Turnover of Actin in the Parasite Toxoplasma gondii

2006 ◽  
Vol 17 (2) ◽  
pp. 895-906 ◽  
Author(s):  
Nivedita Sahoo ◽  
Wandy Beatty ◽  
John Heuser ◽  
David Sept ◽  
L. David Sibley
Keyword(s):  
Critical Concentration ◽  
Microscopic Analysis ◽  
Protozoan Parasite ◽  
Gliding Motility ◽  
Host Cells ◽  
Filamentous Actin ◽  
Unusual Behavior ◽  
Electron Microscopic ◽  
Unusual Form ◽  
Kinetics Of

Toxoplasma is a protozoan parasite in the phylum Apicomplexa, which contains a number of medically important parasites that rely on a highly unusual form of motility termed gliding to actively penetrate their host cells. Parasite actin filaments regulate gliding motility, yet paradoxically filamentous actin is rarely detected in these parasites. To investigate the kinetics of this unusual parasite actin, we expressed TgACT1 in baculovirus and purified it to homogeneity. Biochemical analysis showed that Toxoplasma actin (TgACT1) rapidly polymerized into filaments at a critical concentration that was 3-4-fold lower than conventional actins, yet it failed to copolymerize with mammalian actin. Electron microscopic analysis revealed that TgACT1 filaments were 10 times shorter and less stable than rabbit actin. Phylogenetic comparison of actins revealed a limited number of apicomplexan-specific residues that likely govern the unusual behavior of parasite actin. Molecular modeling identified several key alterations that affect interactions between monomers and that are predicted to destabilize filaments. Our findings suggest that conserved molecular differences in parasite actin favor rapid cycles of assembly and disassembly that govern the unusual form of gliding motility utilized by apicomplexans.

Neomysis americana (Crustacea: Mysidacea) as an Intermediate Host for Sealworm, Pseudoterranova decipiens (Nematoda: Ascaridoidea), and Spirurid Nematodes (Acuarioidea)

1992 ◽  
Vol 49 (3) ◽  
pp. 513-515 ◽  
Author(s):  
David J. Marcogliese
Keyword(s):  
Nova Scotia ◽  
Intermediate Host ◽  
First Record ◽  
Enzymatic Digestion ◽  
Life Cycles ◽  
First Report ◽  
Pseudoterranova Decipiens

Amphipods (Gammarus oceanicus) and mysids (Neomysis americana) were collected from three brackish ponds on Sable Island, 290 km east of Halifax, Nova Scotia. Thirteen nematodes were recovered from 3950 mysids subjected to enzymatic digestion. Four of the nematodes were identified as larval sealworm (Pseudoterranova decipiens). The remaining nematodes belong to two species: Paracuaria adunca and Cosmocephalus obvelatus (Acuarioidea). This is the first record of N. americana as an intermediate host for P. decipiens. It is also the first report of a mysid as intermediate host for either of the acuarioid nematodes and the first evidence of these two nematodes undergoing part of their life cycles in brackish or marine conditions. No nematodes were observed in 2364 amphipods or 1462 mysids examined microscopically, but unidentified metacercariae were found in 1.9% of the amphipods.

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