First molecular identification of Sarcocystis miescheriana (Protozoa, Apicomplexa) from wild boar (Sus scrofa) in Iran

Sarcocystis isolate obtained from the thigh muscle of a wild boar (Sus scrofa), captured from Gilan Province, northern Iran, was subjected to molecular analysis. Genomic DNA was obtained using a DNA extraction tissue kit and Polymerase chain reaction (PCR) for amplification of the 18S ribosomal DNA region yielded an 842. bp DNA band on agarose gel. Analysis of DNA sequencing by BLAST confirmed the isolate as Sarcocystis miescheriana and the sequence was deposited in GenBank by Accession No. GU395554. This is the first molecular identification of an isolate of S. miescheriana in Iran. © 2010 Elsevier Inc

Endoparasites of Rodents and Their Zoonotic Importance in Germi, Dashte–Mogan, Ardabil Province, Iran

Background: In order to verify the infectivity of rodents with endoparasites in Germi (Dashte-Mogan, Arda­bil Province) the current study was undertaken.Methods: Using live traps, 177 rodents were trapped during 2005-2007. In field laboratory, all rodents were bled prior to autopsy, frozen at -20°C, and shipped to the School of Public Health, Tehran University of Medical Sciences, Iran. In parasitological laboratory, every rodent was dissected and its different or­gans were examined for the presence of any parasite. Blood thick and thin smears as well as impression smears of liver and spleen were stained with Geimsa and examined microscopically.Results: Two species of rodents were trapped; Meriones persicus (90.4%) and Microtus socialis (9.6%). The species of parasites found in M. persicus and their prevalences were as follows: Hymenolepis di­minuta (38.8%), Hymenolepis nana (2.5%), Trichuris sp.(40.6), Mesocestoides larva (=tetrathyridium) (3.1%), Capil­laria hepatica (6.9%), Moniliformis moniliformis (11.3%), Syphacia obvelata (2.5%), Taenia endotho­racicus larva (0.6%), Physaloptera sp. (0.6%), Dentostomella translucida (0.6%), Heligmosomum mix­tum (0.6%), Strobilocercus fasciolaris (0.6%),and Aspiculuris tetraptera (0.6%). The species of para­sites found in M. socialis and their prevalences were as follows: H. diminuta (17.6%), Trichuris sp. (5.9%), Mesocestoides larva (5.9%), S. obvelata (11.8%), S. syphacia (11.8%), H. mixtum (17.6%), and Aspiculuris tetraptera (11.8%). There were no statistical differences between male and female for infectivity with parasites in either M. persicus or M. socialis. No blood or tissue protozoan parasite was found in any of the rodents examined. Conclusion: Among different species identified, some had zoonotic importance. Therefore, the potential health hazard of these species needs to be considered to prevent infectivity of humans

A case of fatal strongyloidiasis in a patient with chronic lymphocytic leukemia and molecular characterization of the isolate

Strongyloides stercoralis is a human intestinal parasite which may lead to complicated strongyloidiasis in immunocompromised. Here, a case of complicated strongyloidiasis in a patient with chronic lymphocytic leukemia is reported. Presence of numerous S. stercoralis larvae in feces and sputum confirmed the diagnosis of hyperinfection syndrome in this patient. Following recovery of filariform larvae from agar plate culture of the stool, the isolate was characterized for the ITS1 region of ribosomal DNA gene by nested-PCR and sequencing. Albendazole therapy did not have cure effects; and just at the beginning of taking ivermectin, the patient died. The most important clue to prevent such fatal consequences is early diagnosis and proper treatment

Comparison of Five Simple Methods for DNA Extraction from Echinococcus granulosus Protoscoleces for PCR-Amplification of Ribosomal DNA

"nBackground: Cystic hydatid disease is an important zoonosis, affecting humans and animals and is a significant public health and economic problem throughout the world and Iran. Since extraction of DNA from the parasite is a primary and crucial step which has a principal effect on PCR results, in the current study five simple methods for DNA extraction from protoscoleces of Echinococcus granulosus were ap­plied and compared with each other. "nMethods: After collecting hydatid cysts from an abattoir, DNA samples were extracted from two cyst isolates from sheep, two from goats and two from camels using five different methods involving the use of glass beads, mechanical grinder, freeze-thaw, boiling and crushing. For all DNA samples ex­tracted, one PCR assay based on amplifying rDNA-ITS1 region was performed and amplicons re­solved on 1.5% agarose gels. "nResults: The methods were compared regarding to DNA and PCR bands, time and cost effectiveness and laborious amount. The target DNA was successfully amplified from all samples using all methods produced an expected band size. All methods showed some advantages and disadvantages in PCR gels. The boiling method, which was the most time and cost effectiveness method, achieved the thick­est bands in the PCR following grinder, crushing, freeze-thaw and glass beads."nConclusion: Boiling and crushing methods were the most suitable methods regarding their amplicon quality, easiness, quickness and cost effectiveness

In vitro effects of tropisetron and granisetron against Echinococcus granulosus (s.s.) protoscoleces by involvement of calcineurin and calmodulin

Background: Cystic echinococcosis (CE) is a disease caused by the larval stage of Echinococcus granulosus sensu lato (s.l.). The treatment of CE mainly relies on the use of benzimidazoles, which can commonly cause adverse side effects. Therefore, more efficient treatment options are needed. Drug repurposing is a useful approach for advancing drug development. We have evaluated the in vitro protoscolicidal effects of tropisetron and granisetron in E. granulosus sensu stricto (s.s.) and assessed the expression of the calcineurin (CaN) and calmodulin (CaM) genes, both of which have been linked to cellular signaling activities and thus are potentially promising targets for the development of drugs. Methods: Protoscoleces (PSC) of E. granulosus (s.s.) (genotype G1) obtained from sheep hepatic hydatid cysts were exposed to tropisetron and granisetron at concentrations of 50, 150 and 250 µM for various periods of time up to 10 days. Cyclosporine A (CsA) and albendazole sulfoxide were used for comparison. Changes in the morphology of PSC were investigated by light microscopy and scanning electron microscopy. Gene expression was assessed using real-time PCR at the mRNA level for E. granulosus calcineurin subunit A (Eg-CaN-A), calcineurin subunit B (Eg-CaN-B) and calmodulin (Eg-CaM) after a 24-h exposure at 50 and 250 µM, respectively. Results: At 150 and 250 µM, tropisetron had the highest protoscolicidal effect, whereas CsA was most effective at 50 µM. Granisetron, however, was less effective than tropisetron at all three concentrations. Examination of morphological alterations revealed that the rate at which PSC were killed increased with increasing rate of PSC evagination, as observed in PSC exposed to tropisetron. Gene expression analysis revealed that tropisetron at 50 μM significantly upregulated Eg-CaN-B and Eg-CaM expression while at 250 μM it significantly downregulated both Eg-CaN-B and Eg-CaM expressions; in comparison, granisetron decreased the expression of all three genes at both concentrations. Conclusions: Tropisetron exhibited a higher efficacy than granisetron against E. granulosus (s.s.) PSC, which is probably due to the different mechanisms of action of the two drugs. The concentration-dependent effect of tropisetron on calcineurin gene expression might reflect its dual functions, which should stimulate future research into its mechanism of action and evaluation of its potential therapeutical effect in the treatment of CE. Graphic Abstract: Figure not available: see fulltext. © 2021, The Author(s)

Ectoparasites of Rodents Captured in Bandar Abbas, Southern Iran

Background: Rodents play important role as host of ectoparasites and reservoir of different zoonotic diseases. The aim of this study was to asses the infestation of commensal rodents with ectoparasites in Bandar Abbas, a port city lo­cated in the northern part of the Persian Gulf in Iran. Methods: Rodents were captured using live traps during the study period in year 2007. After transferring the rodents to the laboratory, they were identified and then their ectoparasites were collected and mounted for species identifica­tion using appropriate systematic keys. Results: A total of 77 rodents were identified including Rattus norvegicus (74%), R. rattus (16.9%), Mus musculus (7.8%) and one hamster. Among all rodents, 40.3% were found infested with ectoparasites. A total of 69 ectopara­sites were collected comprising flea, lice, mite and tick. Two species of fleas; Xenopsylla cheopis and X. astia were identi­fied with higher index of X. astia. Two genera of ticks including Hyalomma sp. and Rhipicephalus sp. were identi­fied. Laelaps nuttalli was the only mite found. The Polyplax spinulosa was considered as lice ectoparasite. Conclusion: Among all arthropods collected, flea and lice had the most and the least frequency, respectively. Nearly all rodent species were infested with Xenopsylla. These fleas are important due to their role in plague and murine ty­phus transmission. Ticks are important due to their role in CCHF (Crimean-Congo Hemorrhagic Fever), theileriosis, babe­siosis, anaplasmosis and ehrlichiosis transmission .Monitoring of ectoparaiste infestation is important for prepared­ness and early warning preparation for possible control of arthropod-borne diseases

Characterization of Visceral leishmaniasis in Reservoir Host (dogs) and Determination of Agent by PCR in Boyer-Ahmad District, Iran

Background & Aim: Visceral Leishmaniasis (VL) is an endemic disease in some parts of Iran. Leishmania infantum is the agent of disease in studied areas. The aim of the present study was the characterization of visceral leishmaniasis in reservoir host (dogs) and determination of agent by molecular method in Boyer-Ahmad district, Iran Methods: In this study 15 infected dogs with symptoms of canine visceral leishmaniasis were selected from 5 VL endemic villages of Boyer-Ahmad district in 2010. All cases were tested by DAT for evaluation of anti leishmanial antibodies. After necropsy, parasitological study was conducted by use of impression smear of liver and spleen. Nested PCR was use to detect the parasite DNA in the liver and spleen tissues. Results: From fifteen cases, fourteen dogs had antibody titer above of 1:320 while one of the cases was seronegative. Leishmania amastigotes was seen in 13 smears of liver and spleen (13 cases). The agent of disease in 14 dogs determined as Leishmania infantum by nested PCR. Conclusion: This study confirmed that Leishmania infantum is the causative agent of canine VL in Boyer-Ahmad and the diseases pattern is similar to the rest of country.