Parasitological versus renal and hepatic stigmata after using a new chemotherapeutic agent in experimental schistosomiasis haematobium

This study aims to clarify the parasitological effect of a new antischistosomal drug: Ro 15-9268 [9-acridanone hydrazone derivative, synthesized by Hoffman La-Roche Co. Basel, Switzerland] in experimental schistosomiasis haematobium infection. It also aims to study the repercussion of using this compound on some of the major liver [ASAT and ALAT] and kidney [Serum urea, uric acid and creatinine concentrations] function tests. Forty Golden Syrian hamsters have been used in the experiment. Animals were divided into two major groups. Group I: Included infected [300 +/- 50 cercariae/ hamster] untreated control animals sacrificed at 13, 15, 17 and 19 weeks post infection respectively. Group II: infected hamsters further subdivided into three orally treated small subgroups: subgroup IIa: received Ro15-9268 [5mg/Kgb.wt.], subgroup lIb: treated with the same drug [10mg/Kgb.wt] and subgroup IIc: given oral praziquantel 150mg/kgb.wt. Sacrifice was done two days, two, four and six weeks post treatment respectively. It was found that the effect of Ro 15-9268 at the dose of 10mg/kg b.weight was superior to that of 5 mg/kg and praziquantel, with minimal worm and tissue egg load recovery especially two days and two weeks post treatment. A marked drop in the infection-induced risen liver enzymes [serum Aspartate Amino Transferase ASAT and Serum Alanine Amino transferase ALAT], was noted in the group given the 10mg/Kg drug regimen [P<0.001 from respective untreated control mice]. This drop was less salient in the other two treated groups. As regards the serum urea, it reached the lowest level with the high dose regimen at the second and six weeks post treatment respectively [P<0.05 and P<0.01 from respective infected untreated control animals]. Again, a significant drop in serum uric acid and creatinine was recorded in the group given the two dose regimens, as well as praziquantel at all the time intervalls post treatment for serum uric acid and at the 2[nd], 4[th] and sixth week post treatment for serum creatinine [P<0.001 from infected untreated control hamsters]. This drug could be used in endemic areas where resistance to praziquantel starts to be an emerging public health problem

Plagiorchis muris infection in Apodemus agrarius from northern Gyeonggi-do (Province) near the demilitarized zone

The small intestines of 6 species of rodents and 1 species of insectivore were examined seasonally for Plagiorchis muris infection in 3 different localities in northern Gyeonggi-do (Province), near the demilitarized zone (DMZ). A total of 1,496 animals, including 1,366 Apodemus agrarius, 54 Crocidura lasiura (insectivore), 32 Mus musculus, 28 Micronytus fortis, 9 Eothenomys regulus, 6 Micronys minutus, and 3 Cricetulus triton, were live-trapped at Yeoncheon-gun (n = 351), Paju-shi (804) and Pocheon-gun (343) at 3-mo intervals from December 2004 to September 2005. A total of 1,647 P. muris were collected from 72 (5.3%) A. agrarius. The infection rate was the highest in Pocheon-gun (8.2%), followed by Yeoncheon-gun (5.0%) and Paju-shi (4.2%). A higher infection rate was observed in A. agrarius captured during September (19.4%) than those captured during December (3.0%), June (2.6%), or April (0%). However, the worm burden was the highest in June (av. 32.1/animal), followed by September (24.7), December (4.0), and April (0). None of the other animal species were found infected with P. muris. The results reveal that A. agrarius is a natural definitive host for P. muris, and infection rates and worm burdens vary seasonally and geographically.

Apodemus agrarius as a new definitive host for Neodiplostomum seoulense

A total of 1,496 rodents and insectivores were live-trapped at Yeoncheon-gun (n = 351), Paju-shi (804), and Pocheon-gun (343), Gyeonggi-do (Province), and examined for intestinal helminths, including Neodiplostomum seoulense, seasonally from December 2004 to September 2005. Six species of rodents, including Apodemus agrarius (1,366), Mus musculus (32), Micronytus fortis (28), Eothenomys regulus (9), Micronys minutus (6), and Cricetulus triton (3), and 1 species of insectivores Crocidura lasiura (54) were collected. A total of 321 adult N. seoulense were collected from 19 (1.4%) A. agrarius. The worm burden ranged from 1 to 101 per A. agrarius (mean; 16.9). No N. seoulense was observed in other rodent or insectivore species examined. The infection rate during autumn (4.5%) was higher than those during spring (0.8%), summer (0.8%), and winter (0.5%). The average number of N. seoulense in infected A. agrarius was the highest in spring (66.0 specimens), followed by autumn (15.2), winter (4.5), and summer (3.3). This study first confirms that A. agrarius is a natural definitive host for N. seoulense, and demonstrates that the infection rates and intensities vary seasonally and geographically.

preliminary seport of babesia microtin in sodents thar were trapped from meshkin-Shahr district, ardabil province, Iran

Altogether, 132 rodents of 4 species of Meriones persicus, Cricetulus migratorius, Mus muscriius and Allactaga dater were collected with live traps from different parts of Meshkin - shahr district from summer 1373 to autumn 1374. The purpose of this survey was to identify the parasitic fauna of rodents. Before dissection, the mammals were measured for biometric purposes. Babesia microti, seen in thin smear, were prepared from hearts' blood in one of Meriones persicus, that was infected with Jxodidae ticks and showed local alopecia.This is the first report on the natural infection of a rodent with Babesia microti in Iran