What is heterophyiasis?
Heterophyiasis is infection with the intestinal fluke Heterophyes heterophyes, which is acquired by eating infected raw or undercooked fish from freshwater or brackish water.
What is the common name of Heterophyes heterophyes?
Causal Agents. The trematode Heterophyes heterophyes, a minute intestinal fluke.
What is the deadliest fluke?
F buski, known as the giant intestinal fluke, is found in the duodenum and jejunum of pigs and humans and is the largest intestinal fluke to parasitize humans. Humans are infected by eating freshwater aquatic plants such as water caltrops, water chestnuts, and water bamboo, which can harbor the metacercariae.
Which is the second intermediate host for Heterophyes heterophyes& metagonimus yokogawai?
The first intermediate hosts of Metagonimus yokogawai include freshwater snails Semisulcospira libertina, Semisulcospira coreana, and Semisulcospira reiniana. The second intermediate host include freshwater fish: Plecoglossus altivelis, Tribolodon hakonensis, Tribolodon ezoe, and Lateolabrax japonicus.
Is clonorchis hermaphroditic?
C. Clonorchis sinensis adults are flattened, lance shaped, and measure approximately 10 to 25 mm long by 3 to 5 mm wide. The oral and ventral suckers (acetabulum) are relatively small. Like other flukes, they are hermaphroditic.
What is the intermediate host of Clonorchis sinensis?
sinensis is a fish-borne trematode. There are three hosts in the life cycle of C. sinensis including freshwater snails (the first intermediate hosts), freshwater fish and occasionally shrimps (the second intermediate hosts), and human or carnivorous mammals (the definitive hosts).
Is Fasciola hepatica a trematode?
The trematodes Fasciola hepatica (also known as the common liver fluke or the sheep liver fluke) and Fasciola gigantica are large liver flukes (F. hepatica: up to 30 mm by 15 mm; F.
How does S japonicum differ from other trematodes?
Schistosoma. Unlike all other trematodes, schistosomes are not hermaphroditic but dioecious, forming separate sexes. Adult worms have elongate tubular bodies, each male having a unique gynecophoral canal (schisto-soma = split body) in which a female worm resides.
Is Clonorchis sinensis dioecious?
Clonorchis sinensis under a light microscope: Notice the uterus; this species is monoecious.
What disease does Clonorchis sinensis cause?
Clonorchiasis is an infectious disease caused by the Chinese liver fluke (Clonorchis sinensis) and two related species. Clonorchiasis is a known risk factor for the development of cholangiocarcinoma, a neoplasm of the biliary system.
How are p.summa eggs different from other heterophyids?
They differ from all heterophyid eggs in that they have prominent wrinkling (muskmelon pattern) at their shell surface. P. summa eggs are ovoid to pyriform in shape and characterized by the smallest size of all kinds examined, 19.8-22.9(21.6) micrometer long and 11.1-13.4 (12.1) micrometer wide and the ratio 1.63-1.99 (1.78).
Who are the intermediate hosts of Heterophyes heterophies?
In this figure, the following structures are labeled: oral sucker (OS), pharynx (PH), intestine (IN), ventral sucker, or acetabulum (AC), and eggs within the uterus (UT) Snail intermediate hosts of Heterophyes heterophyes. Like all trematodes, Heterophyes heterophyes requires a snail as an intermediate host.
How big are the eggs of h.heterophyes?
The eggs are hard to tell apart from other related species so there is no accurate estimate of human infection. H. heterophyes is a small trematode, ranging up to 1.4mm long and 0.5mm wide. It is covered with scale-like spikes and those spikes can range from 50–62.
Where do you find the adult Heterophyes worm?
Adults of Heterophyes heterophyes are minute flukes, measuring 1-2 mm in length. The tests are large and paired, and are situated near a small ovary. The surface of the worm is covered with minute spines. Adults reside in the small intestine of the definitive host.