Organisms can end up in unfavourable conditions and to survive this they have evolved various strategies. Some organisms, including nematodes, survive unfavourable conditions by undergoing developmental arrest. The model nematode Caenorhabditis elegans has a developmental choice between two larval forms, and it chooses to develop into the arrested dauer larva form in unfavourable conditions (sp...

A case of acute intestinal anisakiasis has been reported; a nematode larva being found in the submucosa of the ileum of a woman in Jaén (Spain). The source of infection was the ingestion of raw Engraulis encrasicholus. On the basis of its morphology, the worm has been identified as a fourth-stage larva of Anisakis simplex. In Spain, this is the ninth report of human anisakiasis and also probabl...

toxocariasis or visceral larva migrans (vlm) is a parasitic infection resulting from the invasion of human visceral organs by nematode larvae of genus toxocara (dog ascaris). using gathered information of clinical manifestations, past history, biochemical and haematological tests, indirect fluorescence antibody test (ifa) and follow up of patients, totally 10 human cases (6 males and 4 females)...

case presentation here, we report three rare but well-documented cases of central nervous system hydatid cysts that occurred in patients in iran. conclusions we also provide a brief review of the literature examining similar occurrences. this article intends to provide thorough information about the disease for readers. introduction hydatid disease is caused most common by echinococcus granulos...

The last instar larva of Metapteron xanthomelas (Lucas, 1857) is described. This is the first description of a larva for the genus. Two live larvae collected in the Brazilian Atlantic coast Restinga Forest of Itanhaém, São Paulo, were reared, one to adult and one was fixed in the last instar. This larva differs from the known Calopterini larvae by the absence of urogomphi, the dorsal abdominal ...

Anopheles (Nyssorhynchus) lanei Galvão and Amaral is here redescribed using morphological characteristics of adult, male and female, fourth instar larva and pupa. The larva, pupa, and male genitalia are illustrated. Diagnostic morphological characters of adults, male genitalia, fourth instar larva and pupa are provided to distinguish An. lanei from other species of the Argyritarsis section. Spe...

We report a case of human nasal nosocomial myiasis in a 69-year-old rural man with numerous live maggots in nostrils. The patient was admitted in Emergency Ward due to dyspnea. After 72 hours the companion of patient discovered larva. The presence of the third instar larva indicated that the infestation was not more than three days. The collected instars were cleared, fixed and morphological st...

INTRODUCTION Cutaneous larva migrans is caused by infection with hookworm larvae in tropical and sub-tropical areas. A history of recent travel to the tropics is usually elicited. CASE PRESENTATION A case of cutaneous larva migrans is described in which symptoms did not appear until five months after travel to Tanzania. CONCLUSION Although the lesion of cutaneous larva migrans may appear im...