Malaria in pregnancy: why the risk changes and what actually prevents it

Adults who have grown up in a place where malaria is constant build up partial resistance. It does not stop them being infected, but it usually keeps the illness moderate. Pregnancy weakens that resistance, and the effect is strongest in a first pregnancy.

The result is a woman who can be seriously unwell from an infection her husband would shrug off. Mothers in Kamuli and Napak often describe it as malaria that hit differently this time, and that description is accurate rather than imagined.

The parasite also collects in the placenta, where it can affect the baby's growth even when the mother does not feel especially ill. That is why prevention matters in a pregnancy where nothing has gone wrong yet.

In the mother, malaria destroys red blood cells, which is one of the main routes into anaemia. A mother who has had repeated malaria through a pregnancy often arrives at delivery with low blood and less capacity to withstand bleeding.

In the baby, malaria in pregnancy is associated with low birth weight, early delivery and, in severe cases, losing the pregnancy. A small baby is harder to feed, harder to keep warm and more likely to need the sort of care that is not available at a health centre III.

Severe malaria in a pregnant woman is a medical emergency. Confusion, fits, difficulty breathing, being unable to keep fluids down or being too weak to stand mean going to the nearest facility immediately, at any hour.

Owning a net and sleeping under one are different things, and the gap between them is where most infections happen. The mosquitoes that carry malaria bite mainly at night, so a net that is up at eleven o'clock is doing the whole job.

Hang it so it covers the whole sleeping surface and tuck the edges under the mattress or mat before you lie down. A net with a hole is still worth using, and a hole is worth sewing rather than ignoring. Wash it gently and dry it in the shade rather than in full sun.

The hard months are the hot ones, when people move outside to sleep on a mat in the compound. If that is your household, hang a net outside too, or accept that the compound is not a safe place to sleep while pregnant. Nets also disappear into gardens and fishing. A net used for either is a net nobody is sleeping under.

Antenatal care in Uganda includes preventive treatment for malaria given during the pregnancy at set visits, swallowed at the clinic in front of the midwife rather than taken home. This is one of the concrete reasons that attending all the visits changes outcomes rather than just filling in a card.

Clinics also test when you have symptoms, check your blood for anaemia, and are where nets are often distributed to pregnant women. If you are given a net at the clinic, hang it that same evening rather than keeping it folded for a visitor.

If you miss a visit, go as soon as you can and say which one you missed. Do not skip the next one because you feel behind. Tell your village health team member too, since following up missed visits is exactly what she is there for.

Mosquitoes breed in standing water, and most compounds have more of it than anyone notices: an old tin, a broken basin, a tyre, a pot behind the kitchen, a puddle where the washing water is thrown, a blocked drainage channel after the rains.

Walk your compound once a week in the wet season and tip out everything holding water. Fill in the low spot where the washing water collects, or dig a channel so it drains away. Clear tall grass and bush from immediately around the house.

Close doors and windows before dusk, and screen them if you can. None of this replaces the net. It reduces how many mosquitoes are around the house, which is worth doing, but the net is the part that protects you while you sleep.

Go to a health facility the same day and ask for a malaria test. In pregnancy, a fever is not something to sleep off for a night to see whether it settles. The distance and the queue are the reasons people wait, and waiting is what turns ordinary malaria into severe malaria.

Say at the desk that you are pregnant and how many months. That changes how you are assessed and what you are given. Bring your antenatal card so the clinician can see your blood result and your history.

Take the full treatment you are given, exactly as the clinician explains it, even after you feel better. Stopping halfway is one of the reasons a mother is back with the same fever a fortnight later.

Buying something over the counter is faster and cheaper than the queue, which is exactly why so many households do it. In pregnancy it is a poor trade for three reasons.

First, not every fever is malaria, and treating the wrong thing means the real cause carries on untreated. Second, not everything sold for malaria is suitable in pregnancy, and the shop attendant is not in a position to judge that. Third, a shop does not test, so nobody ever knows what you had.

If money is the obstacle, say so to your village health team member rather than solving it at the shop counter. Transport and the facility are usually a smaller cost than a mother admitted with severe malaria at seven months.

The newborn needs the net as much as you do, and the simplest arrangement is the baby sleeping under the same net as the mother. Do not put the net over the bed and the baby on a mat beside it.

Fever in a young baby is an emergency in its own right and needs a health worker the same day. Do not give a newborn anything bought for an adult.

Keep the net in use through the months when you are recovering. A mother with low blood after delivery has even less to spare if malaria arrives on top of it.