for investination of causes of silkworm mortality, the sick larva specimens in different levels of growth examined for parasite, viral,fungal and bacterial diseases. the samples included some dead larva and bed materials contained eggs, leaves and stool which were examined ordinary diagnostic methods. the complementary tests were also used for all cases. in wet smear prepared from intestine wal...

We report that a stage-specific developmental program, dauer larva formation, is temporally regulated by four heterochronic genes, lin-4, lin-14, lin-28, and lin-29. The effects of mutations in these four genes on dauer larva formation have revealed that they regulate two different processes of dauer larva formation: (1) a decision specifying the larval stage at which dauer larva development in...

In this observation a total of 140 schistosomula of schisto­soma mansoni and 36 schistosomula of schistosoma haematobium which were obtained from 36 Laboratory albino mice,each infec­ted with 1000 cercaria were studied.The animals were sacrificed in a certain intervals and the schistosomula from the skin, lung and liver were collected by special technique. The result of this study showed that t...

We report a case of human nasal myiasis caused by flower fly larva in a 14-year-old rural girl in Central Province of Iran. Entomological studies on larva showed the larva as Eristalis tenax which is a rarely cause of nasal myiasis. This is the first reported case of E. tenax larva causing human nasal myiasis in Iran.

1. The second-stage larva of the plant parasitic nematode Heterodera rostocfaensis shows very little movement while confined to the egg; on the other hand, the larva of the closely related Meloidogyne incognita is very active 2. Using interference microscopy, it is shown that the water content of the Heterodera larva increases immediately it is liberated from the egg while that of the Meloidogy...

alter a definition of the condition of larva migrants and a description of the types of helminthes which cause this affection in man a brief account of the pathology and clinical manifestations of both visceral and coetaneous larva migrants is given. studies undertaken in iran have revealed the presence of most of 1ihe animal helminthes which cause coetaneous larva migrants of the parasites whi...

Contamination of human and animal body tissues with flies' larvae and diptera cause myiasis. A 26 yr old female patient refers to Kashan Shahid Beheshti Hospital, central Iran because of urogenital infection, pain in the right part of stomach, smelly and reddish vaginal discharge and frequent urination. In the first checking, urine sample was taken. In the sample, active and alive larvae were s...

This is the first description of larva and puparium of Oplodontha rubrithorax (Macquart, 1838) from the Oriental Region. Larvae were found at a hot spring in North Thailand. The morphological features and cuticular structures of the larva are documented by drawings and SEM micrographs and the main characters are compared with the European O. viridula (Fabricius, 1775), the only described larva ...

During 1997, gross and histopathologic examinations were performed on an adult female raccoon (Procyon lotor) that was live-trapped in Corvallis, Oregon. Multifocal eosinophilic granulomas indicative of neural and visceral larva migrans were observed. However, within these granulomas, the presence of parasitic larva was seen only in the cerebrum. Morphologic characteristics indicated that the n...