How shipworms can help human health


This 2018 video says about itself:

Giant Shipworm | World’s Weirdest Animals

Creeping and crawling below the earth’s surface is a worm you’ll have to see to believe, on this episode of world’s weirdest animals we bring you the shipworm.

-found in the Philippines
-lives in a long hard shell
-it’s long slimy like a worm but 3 feet long
-have been documented since the 18th century
-only recently have scientists have had access to living forms of the creature
-they belong to the mollusks family such as scallops, mussels and oysters
-they shell they inhabit is made of calcium carbonate
-they can be found in shallow lagoons immersed in mud, they are basically the geoduck of the Philippines
-they burrow in rotting pieces of wood and feed on bacteria in the mud, these creatures essentially hang upside down with a siphon protruding out of the mud and their mouth at the bottom of the tube
-the y-shaped siphon is used for taking in and expelling water
-the surrounding mud emits hydrogen sulfide which is used by the gills of the shipworm to produce carbon which they feed off
-simplified they convert chemicals from rotting wood into fuel which is similar with plants and sunlight.
-the hydrogen sulfide-rich mud also reeks of rotten eggs which apparently means mealtime for the shipworm.
-the shells of shipworms have been found for some time as they are very sturdy but only recently have scientists found the live shipworm itself
-the worms were once common all over the world but their numbers have declined
-to make things worse for the shipworm their shells are quite valuable to collectors
-prior to this shipworm finding, the best information scientists had was from drawings of a poorly preserved 1960s specimen that was dead
-when scientists opened the shell they said it was a lot like opening an egg and were shocked by how black the shipworm is and how beefy they are

From Washington State University in the USA:

Compound in the gills of clams may fight common infections

June 11, 2020

A compound discovered in the gills of wood-eating clams could be the solution to a group of parasites responsible for some of the world’s most common infections.

That compound is tartrolon E, a byproduct of bacteria that help shipworms, a group of saltwater clams, digest the wood they eat.

According to research recently published in PLOS Pathogens, the compound, unlike any other, is proven to kill causal parasites for malaria, toxoplasmosis, cryptosporidiosis, theileriosis and babesiosis.

“There are compounds that work against the individual parasites, but to find one that works against this entire group, that is what made this unique,” said Roberta O’Connor, an associate professor in Washington State University’s Veterinary Microbiology and Pathology unit, and first author on the paper.

While there are already effective drugs for many of the parasites mentioned here, O’Connor said this group of parasites, called apicomplexans, readily develops drug resistance.

“Development of new, effective drugs against apicomplexan parasites is an ongoing need for human and veterinary medicine,” she said.

One of those parasites in need of a more effective remedy is Cryptosporidium.

Cryptosporidium, a waterborne zoonotic parasite, is a major cause of diarrhea in children, immunocompromised patients, and in newborn animals worldwide. The parasite infects millions of humans and agricultural animals annually.

In addition to killing this class of parasites in vitro, tartrolon E was able to kill Cryptosporidium in newborn mice.

Beginning this summer, WSU researchers will test the compound against Cryptosporidium in lambs.

Currently, nitazoxanide is the only drug approved by the Food and Drug Administration to treat cryptosporidiosis.

“Nitazoxanide doesn’t work well for those [patients] who are immunocompromised or malnourished and those are the people most vulnerable to Cryptosporidium,” O’Connor said.

O’Connor is the principal investigator on the study which will characterize the specific effects of tartrolon E on Cryptosporidium parasites. Villarino will lead the pharmacokinetics portion of the study in immunocompromised mice to further assess tartrolon E’s effectiveness and optimal dose regimens.

The research is made possible by a recently awarded 5-year, $1.6 million grant from the National Institutes of Health.

“We will define how the drug behaves in the body and how much of the drug is needed to control Cryptosporidiuminfection,” Villarino said. “We want the maximum effect with minimal adverse effects.”

This aspect of the research on the compound is a key component for drug development.

“This could have a significant impact on human and veterinary medicine because there is no other drug that can effectively treat this condition,” Villarino said.

O’Connor and Villarino are hopeful tartrolon E will lead to a clinically developed drug but they know it is a long way to get there.

“Tartrolon E is obviously hitting some system that is common to [all] these parasites,” O’Connor said. “Even if this compound isn’t successful, if we can determine the mechanism, we will have identified a common drug target for all these parasites.”

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