Master's student Aliou Amadou Dia (L) inspects a Nile tilapia with other students at the aquaculture department of Gaston Berger University in Saint-Louis on August 21, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)

Workers fill bags with rough rice harvested from a paddy field in Lampsar, on August 20, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)

Master's student Aliou Amadou Dia holds freshwater snails, used by the Schistosoma parasitic flatworms as an intermediate host in their life cycle, at the aquaculture department of Gaston Berger University in Saint-Louis on August 21, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)

A worker harvests rice using a combine in a paddy field in Lampsar, on August 20, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)

A general view of a bag full of rough rice harvested from a paddy field in Lampsar, on August 20, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)

A worker harvests rice using a combine in a paddy field in Lampsar, on August 20, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)

Robane Faye, professor in the aquaculture department at Gaston Berger University, feeds Nile tilapia kept in a breeding tank at the university in Saint-Louis, on August 19, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)

An aerial view of paddy fields in Lampsar, on August 20, 2026. In Senegal, rice and fish are ubiquitous dietary staples and practically a matter of national pride, so growing the two side-by-side is logical, those involved say. The fish eat snails that cause the parasitic disease schistosomiasis, while also fertilizing the rice with their poop. The disease, which has a wide range of symptoms from itchy skin to anaemia or organ scarring, can be treated with medicine. But that doesn't prevent reinfection nor mitigate the time and money lost when children miss school and adults miss work, furthering cyclical poverty. (Photo by PATRICK MEINHARDT / AFP via Getty Images)