had to take the drug he has lived with his to some masses for some time. going to be a vote of all the government i'm wondering if. they knew they were going to go into . another part of the job as health representative is to ensure that all children get their treatment. fair we knew we. wanted. the law allowed to give done a good many different lutie thousand bees about our border there would have been. dog up for. good you don't know when the top would so i'm a little hungry then you know what i don't want to do out at their door when.

the number of pills a child needs is determined by the height. of . the. market now and then and for me when joe got a phone i'm not going to be. listening with a billboard only down we'll get to. zero. in the so my. mom my island enough but the holland. bigger children need to swallow a number of pills in a single dose a tough challenge for some.

real good you're going to get them was a hell of a son of adoption so i knew none of economic middle of them were old well mughal and one lady obama got to know just about. yet even if they do manage to get their pills down it is not enough to keep them free of the disease. if you don't know the area. well for. the only drug that we have kills them worms inside you but it won't prevent you from getting reinfected tomorrow when you go to wash the dishes or three days later when you go to swim. thirty years later there's actually no cure or. even the most somebody piled up there. or not put in

a lot. no part of pacifism. but distribution of even a single dose a year seems impossible only a small percentage of the millions of people who need present gone to get it. the biggest problem i think that anybody faces in trying to treat or control schistosomiasis is the scale of the disease it is everywhere. the senegal river basin itself is larger than the u.k. it's huge so imagine trying to find small communities of five households spread out all over the landscape it's tragic they can't distribute present quartal in any meaningful way i'm sorry to say when in senegal fifteen percent of the people at risk actually get the treatment.

elizabeth was convinced that there was a completely different solution to the problem and the true was back at the dam wall. but boy and his sons live by fishing in the s. carried below the dam wall. like his father before him budge fishes for prawns a once abundant species now they're difficult to find. will move old. boss agog get the get rid of that. before the dam prawns thrived upstream in thousands of kilometers of freshwater away and only migrated to the solti estuary to lay their eggs laying in the new. guinea begin up and. they were having a feeble. bud to only find prawns against the dam he's

convinced they can smell the sweet water on the riverside. boarder be. with us most of them down. there you. know what. it would be. worth a thousand. you deal with to be a fairly. the province lifecycle involves needing to go to salt water to reproduce the female only migrates it goes to estuaries lays its eggs there and then she and the larva

move back up the river that's the natural cycle because the dam prevented them from reaching their breeding ground the species became extinct but the wall. could it be that the poor ones are the missing link between the building of the dam and the disease it's triggered. they knew the dam they knew that we know that dams cautiousness mises but how does it cause just as my says. we discovered that by removing the predator of the snail this population exploded. the prime disappeared this snail population exploded the disease exploded so bringing back the problem is like understanding the mechanism of disease you understand the mechanism of action you bring in the predator back to control that snail population and and you can control system or more elizabeth solution lies outside

a medical approach she plans to bring pronged back into the river but her dam wall sits between a good idea and its realisation. the cricket world isn't about match fixing i mean you have to think why would he give me a god because then he didn't burn to me and it's if i get into the big bang bang. al-jazeera is investigative unit reveals explosive new at the documentary confirms to me now is a very hard profile figure in match fixing and international cricket you know this man al-jazeera investigation cricket's match fixing the manoa files and monday put it well on the i j z the u.s. and british companies have announced the biggest discovery of natural gas in west africa but what to do with these untapped natural resources is already

a source of heated debate nothing much has changed they still spend most of their days looking forward to for the dry riverbeds like this one five years on the syrians still feel battered or even those who managed to escape their country have been truly unable to escape the war. if you were in beijing looking out the pacific ocean you'd see american warships when myth was that somehow time is aiming to replace america and going to run the world while the chinese are not that stupid things guys want to dominate a huge chunk of the planet this sounds like a preparation for war our first president george washington said if you want peace prepare for war the coming war on china to on a josie. i

know there are a colander how the top stories on al-jazeera u.s. president donald trump for the first time has appeared to hint at saudi crown prince moment been salmond's possible involvement in the murder of journalist jamal khashoggi in an interview with the wall street journal trump says the crown prince is running things in the kingdom so if anyone were to be involved it would be him his administration has revoked visas for twenty one saudi nationals nothing that they've done. is done well it certainly has not been. spoken properly they did the wrong thing even thinking about the idea they certainly did a better job of execution and they certainly did a better job of talking about it or covering it up if you'd like to see it but i would say it was a total fiasco. he's president wants those behind the murder of democracy to be extradited to face trial in his country. one has called for an independent

investigation. the u.s. and russian presence could meet in france next month over american plans to withdraw from a landmark nuclear weapons treaty. both attend a world war one commemoration of event in paris on the eleventh of november russia says they plan to hold a bilateral meeting on the sidelines u.s. national security adviser john bolton has held talks with putin in moscow the united nations says millions more people in yemen are facing famine than previously thought the un's humanitarian chief has given security council an update on the situation there. says the three year conflict has left some fourteen million people on the brink of famine and a completely reliant on aids. a palestinian teenager has died after he was shot by israeli forces at the gaza border last week seventeen year old was shot in the head during a protest on friday he later died in hospital. in iraq at least six people have

been killed in a bomb attack two soldiers were among those killed when a car exploded near a restaurant crowded market in the northern city of. and seven thousand people escaping poverty and violence in three central american countries are defying donald trump by continuing their march towards the u.s. border and are heading north through mexico us actually estate so the caravan poses a danger and warn the migrants to turn back now with all the headlines about with more news here on al-jazeera but first let's get you back to life lines. ever since the d.m. a dam was built thirty years ago the people of the center down river basin have been ravaged by schistosomiasis also known as bill has here.

when the down was built the river prime which is a migratory species disappeared from the dam that allowed the snail population to explode and once the interaction between humans started happening in the infection was present. just just exploded. in two thousand and twelve elizabeth started to project chris vets to test a theory that poems could solve the she still problem. the project aims to measure how effective they are in getting rid of the snails that a host to the parasite in the river. but first she and local health her son and i run a trial at a small test site at village. because this is a migratory species we thought well how are we going to keep them there so we built

a enclosure around the water point. at. the water point is used by over eight hundred people if just a few individuals urinate in the water it will keep the cycle of infection going. was interesting about this parasite is that can actually change the behavior of the human and. the human the urge to be when the human is up to in the water because the parasite wants to survive it wants to get in the water to hatch the eggs. these are hundreds of swimming larvae that hatched when fed to do urine was mixed with water in a laboratory. when the project started almost every snout at the test site was infected elizabeth will need hundreds of prone it had idea is to work.

and so it is to her roots are more than three and a hostiles and kilometers away that she must go to find them. the low b. rhythm is much the same as the senegal river was before the dam was built. like the fishermen in senegal my band in london traps prawns but there is no dam here and so they are abundant. as off the land or shall i. get over my grandpa and fun to be here for sick ok first call today as far. as the marginal cubical my. if i'm to follow canals salted aopa

should i lead around. my band has caught three hundred and kept them alive for elizabeth. these problems occur in rivers unknown the entire west african coastline. why are we re storing this animal that has to migrate to reproduce why don't we bring in some other prime the reproducers and precious water that will do the same job and the reason is that we really are dedicated to restoring biodiversity restoring indigenous species is the best thing to do. in the the poem my cycle hasn't been interrupted not even i want to fold will stop them from climbing up to fresh water off that they have bred in there with a mouth. even tiny do the nile's propel themselves upstream by hopping from rock

pool to rock. under natural conditions this plan would migrate fifteen hundred kilometers of river it's range is fifteen hundred kilometers so it's actively travelling up and down the river all the time. we were really worried about the cost of air freight because the most expensive aspect of shipping fish is the weight of the water that you have to ship in. makes me kind of nervous because it's a really really long journey it's four or five hours from here to do. a seven hour flight time on the ground and then another five hours to sound that we are where we

even get to take them out of the boxes and then we still have to transport them to the river to reverse so there can be casualties. the pain meds at two in the morning eighteen hours off to the poems left. there's always a risk that it won't work but we're trying very hard to do it. i don't think this is a crazy idea. i think we're doing it the most responsible way that we can. next is another trip to san luis and then on to the red. dawn and the last leg to the water point at lums.

the entire trip has taken twenty six hours. looks like they're looking at it that way if i don't i'm at third of the poems have not survived the journey from chama right. i'm going to do that not that i'm looking at it it is just a little. less sun intently transfers what's left of the precious predators to the new environment. what i've been wanting to get rid of amanda knox i want to hold a good full neck lay down from two other good. they're going down you know and you know part of me i'm going to get up to the red minded to be good when you know me with them when you define good and you

definitely made my thunder think i'm going over my to do it i may have to go left keep you as you can but if you're not going to read you know if you will and i can . get. the other. people. to do it.