Is it Malaria Relapse?

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QUESTION

WHILE IN VIETNAM, I HAD VIVAX AND FACIPRIUM MALARIA. THE OLDER I GET I COME DOWN WITH THE CHILLS, FEVER AND PROFUSE SWEATING. BLOOD TEST NEVER DOES SHOW ANY MALARIA BUT DOES SHOW THE VIVAX ANTIBODIES. DOES THIS MEAN I STILL HAVE MALARIA OR HOW LONG DO THE ANTIBODIES REMAIN IN MY BODY AND WHY NO MALARIA CELLS?

ANSWER

Antibodies to malaria can persist in the body for years after the malaria infection, so if blood tests are not showing up malaria parasites but do show you have antibodies, then you probably don’t have malaria now, and it is just showing that you once had malaria, but it could have been many years ago. You should talk to your doctor about other possible infections that might be causing your symptoms.

Falciparum Long-term Outcomes

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QUESTION

My husband was admitted to ICU for 22% falciparum parasite load (with some mild kidney and liver failure, as well as low blood pressure) after being overseas two weeks earlier.

They treated him with IV artesunate and oral Malarone and an exchange transfusion, and discharged him after a week, as his kidneys had improved and so had his blood pressure, and he wasn’t yellow anymore. He never went unconscious.

He’s still quite short of breath and having a challenging time climbing stairs which hasn’t really improved over the past week. It’s not outright respiratory distress, as he was having this in the hospital as well and never actually needed oxygen. He’s also still feeling warm (though no documented fevers).

I am wondering about: a) Whether testing for recrudescence is useful almost two weeks after symptoms started b) how long this shortness of breath is anticipated to last (and is it secondary to a mild transfusion reaction, as his chest Xrays were always normal in the hospital) and c) will there be long-term sequelae I should be aware of (as I can’t find anything except for “falciparum infection has poor prognosis if not treated promptly’) and d) what are his risks of becoming this sick again?

ANSWER

It sounds as if your husband received good care and that you are very well informed which is excellent.  Recrudescence can occur up to 28 days after initial infection but it isn’t common if the above treatment was given.  One of the side effects of malaria is anemia, and this can cause fatigue and breathlessness.  My hunch is that he probably is anemic and should be eating iron rich foods (meats, greens) and taking an iron supplement. It is best to check with your primary care physician who can order a simple blood test to check for anemia and advise you on supplements and nutrition.  There shouldn’t be a poor prognosis in the long term for people treated and recovered from falciparum malaria. I hope this helps.

Malaria or Kidney Infection?

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QUESTION

Two months ago my daughter was in Uganda working and when came back to the States she was hospitalized for 4 days with Malaria symptoms. Her tests came back negative they really didn’t act like they knew how to treat this. They kept telling her they didn’t know how to diagnosis Malaria. So they treated her for it. She now after 2 months is once again hospitalized with the same symptoms. They are telling her they think it is a kidney infection. Can malaria be misdiagnosed as a kidney infection. She once again has all the symptoms as malaria?

ANSWER

What tests did the doctors do to try to diagnose malaria in your daughter when she first got back to the States? Usually, malaria is diagnosed by a blood test, whereby a trained technician will look at the patient’s blood under a microscope. The technician looks for signs of the malaria parasite in the patient’s blood, and if seen, can determine the intensity of the infection as well as the species of malaria. This is important information for accurate treatment. Alternatively, rapid diagnostic tests, which utilize a droplet of blood in a device which looks similar to a pregnancy test, and can very quickly determine whether someone is infected with malaria. It is important to know that malaria cannot be diagnosed by looking at standard blood parameters. If you don’t think your doctors know what is afflicting your daughter, you should take her to a clinic which specializes in tropical or travel medicine. There, they will certainly know how to effectively diagnose your daughter.

Given that your daughter experienced a resurgence of symptoms two months after returning, if she did have malaria, then there are two kinds which she might have: Plasmodium ovale and Plasmodium vivax. The other types of malaria, including the most deadly kind, P. falciparum, are not able to come back and relapse once they are treated. However, in order to prevent future relapses, your daughter may also have to be treated with another form of medication called primaquine. I will emphasize again, however, that it is crucial to gain an accurate diagnosis before taking any form of treatment for malaria.

Recurrence of Malaria

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QUESTION

If a person treated for malaria after being infected from a malaria endemic country of West Africa and cured then he travel back to his country which does not known for malaria endemic region of the world. Question is: Is there any chance of re-occurrence even he is not being exposed to malaria spreading mosquito for some time may be year?
Is it true Malaria parasites stays in liver as hibernation for a long period and attack after many months or year?
If so what treatment can prevent it?

Please advise.

ANSWER

There are several different types of malaria which are found in West Africa, and the most common and deadly form, Plasmodium falciparum, is not able to hibernate in the liver. However, two other types of malaria are able to lay dormant in the liver – these two kinds are called Plasmodium vivax and P. ovale. Both are not nearly as common as P. falciparum in West Africa, though P. ovale has been reported at prevalences of over 10% in some areas, which is double its usual prevalence elsewhere in the world. Weeks, months or even years after an initial infection with P. vivax or P. ovale, the patient may experience what is known as a relapse, which is when the dormant liver forms become active again and re-invade the blood stream, causing a renewal of malaria symptoms. These relapses can be treated with normal anti-malarial drugs (even chloroquine, in many cases), but a different drug is required to kill the dormant liver forms and prevent future relapse. This drug is called primaquine, and may not be suitable for people with certain types of G6DP deficiencies, so you should talk to your doctor about having a test for this condition before taking primaquine.

Malaria in Pakistan

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QUESTION

4 years ago I traveled to FATA Pakistan and in every year in the month of August I caught malaria. Last few days I feel much Headache and fever in the evening and go to doctor. He diagnosed malarial parasites in blood and has advised me take tab artem ds 2 BD for three days after complete the course I feel same headache fever with shivering. Please recommend something.

ANSWER

I am not sure which malaria treatment you have taken—was it just artemisinin, or a combination drug which also included another anti-malarial? The latter type is what is recommended by the World Health Organization (WHO); treatments only containing artemisinin are very effective short term, but can sometimes leave a few parasites alive at the end of the course, which not only may result in a recurrence of symptoms (known as recrudescence) but is very bad in terms of leading to drug resistance in the malaria parasite. However, it is also possible that you are merely experiencing some slight side effects to the medication you took; often these mild side effects are very similar to the symptoms of malaria! If you don’t feel better in a few days, it might be worth visiting the doctor again to check that you don’t still have malaria parasites in your blood.

Malaria Symptoms

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QUESTION

What are the symptoms of Malaria?

ANSWER

Symptoms of malaria include fever and flu-like illness, including shaking chills, headache, muscle aches, and tiredness. Nausea, vomiting, and diarrhea may also occur. Malaria may cause anemia and jaundice (yellow coloring of the skin and eyes) because of the loss of red blood cells. Symptoms usually appear between 10 and 15 days after the mosquito bite. If not treated, malaria can quickly become life-threatening by disrupting the blood supply to vital organs. Infection with one type of malaria, Plasmodium falciparum, if not promptly treated, may cause kidney failure, seizures, mental confusion, coma, and death. In many parts of the world, the parasites have developed resistance to a number of malaria medicines.

For most people, symptoms begin 10 days to 4 weeks after infection, although a person may feel ill as early as 7 days or as late as 1 year later. Two kinds of malaria, P. vivax and P. ovale, can occur again (relapsing malaria). In P. vivax and P. ovale infections, some parasites can remain dormant in the liver for several months up to about 4 years after a person is bitten by an infected mosquito. When these parasites come out of hibernation and begin invading red blood cells (“relapse”), the person will become sick.

Infection with malaria parasites may result in a wide variety of symptoms, ranging from absent or very mild symptoms to severe disease and even death. Malaria disease can be categorized as uncomplicated or severe/complicated. In general, malaria is a curable disease if diagnosed and treated promptly and correctly.

Recurrence of Malaria Symptoms

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QUESTION

If a person suffering from malaria is given the proper treatment and he gets well but he again develops the symptoms of malaria..? These symptoms would arise from liver or blood? Who’ll be responsible for the recurrence of the symptoms?

ANSWER

Malaria can come back in three ways: first of all, the person could have been successfully treated, but then re-infected again by being bitten by an infected mosquito. In these cases, the person should focus on improved malaria prevention, such as sleeping under a long-lasting insecticide treated bednet.

Secondly, the patient could have recrudescence: when the patient takes medication, the treatment kills most of the malaria parasites in the blood, and enough so the patient feels better again, but some parasites still remain. Then, after the treatment finished, the parasite is able to replicate again, they increase in number in the blood and the patient feels ill again. In this case, you would say the infection came back from the blood, and the patient should take another dose of anti-malarials, but of a different kind to that which they originally had, in order to kill all of the parasites.

Finally, there is what is called relapse, which only occurs with two types of malaria: Plasmodium vivax and Plasmodium ovale. These are able to form dormant stages in the liver, so even when all the parasites are killed in the blood by the malarial treatment, these dormant forms survive. Many weeks, months or even years later, these dormant liver stages can re-activate and enter the blood again, causing new malaria symptoms. In this case, the liver was the source of the parasites. Again, the active blood infection should be treated with anti-malarials, but the patient should also talk to their doctor about taking primaquine, a drug which can kill any remaining dormant liver forms and thus prevent future relapses.

Trophozoites of Plasmodium Vivax

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QUESTION

What should I take in this condition? After treatment I came to know that Rechocin should be taken for 6 months 2  weekly.

ANSWER

I am not sure I understand your question, but if you have been diagnosed with trophozoites of Plasmodium vivax in your blood, then you can be treated with normal anti-malarials (the World Health Organization recommends artemisinin-based combination therapies for first line treatment of uncomplicated malaria, but depending where you are, you might even just be able to take chloroquine), as these kill the blood stages of malaria. To prevent relapse, caused by hypnozoites dormant in the liver, you should talk to your doctor about the possibility of also taking a course of primaquine, which usually lasts 14 days. This drug is not suitable for people with G6DP deficiency, however, so you may need a test for this condition before you can take the treatment.

Dormant Malaria

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QUESTION

I was bitten by mosquitoes many years ago and I was wondering can the symptoms lie dormant for as long as 40 years? The reason I am asking is that every summer I am ill with several of these symptoms. I do not have a good immune system.

ANSWER

There are a couple of types of malaria, namely Plasmodium vivax and Plasmodium ovale, which can lie dormant for many years, and often cause relapses at regular intervals.

Next time you suffer from these symptoms, you should go to your doctor and have a blood test to check for malaria; while you are experiencing symptoms, if you have malaria, the parasites will be visible in your blood.

Once positively diagnosed, your doctor can provide you with treatment. If you do have malaria, you will need one medication to clear the infection from your blood (which kind depends on where you were when you got those mosquito bites; malaria has become resistant to certain types of medication in some areas), plus another type of medication to kill the dormant forms which are responsible for the yearly relapses. This latter medication is called primaquine, and is not recommended for people with G6DP deficiency, so you should be tested for this prior to taking the medication.

Having said all of that, it is very important to get the blood test if you suspect you have malaria, because the symptoms of malaria are very general (fever, chills, nausea, aches) and can be mistaken for many other illnesses. If your blood test is negative for malaria, then you should talk to your doctor about other possible infections.

Am I more susceptible to malaria?

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QUESTION

I contracted common malaria, vivax?, when i was 20 yrs old from long visit to Papua NewGuinea, 1970. Returned to USA and was treated with chloro, primaquine drugs and really no problems since treatment.

Now going to Thailand for week, Chiang Mai and region. If bitten by local malarial mosq. am i more likely to recur? And should I certainly choose prophylaxis? thnx

ANSWER

If you were treated successfully with chloroquine and primaquine then there is no reason for your malaria to reoccur. Since it has been a long time since you had malaria, you probably also don’t have any antibodies against the parasite in your system anymore; this just means you don’t have any extra immunity against P. vivax (which you might have done if you had returned to a malaria area, and particularly one with the same strain of P. vivax as that which infected you, within a few months or years of being infected the first time), but it doesn’t mean you will be any more susceptible than someone who never had malaria.

In terms of where you are going, the city of Chiang Mai itself is not considered to have malaria transmission, but the areas surrounding it are, particularly as you get closer to the Burmese border. As such, if you will be travelling in rural and/or forested areas, you might want to consider taking prophylactic medication (and other preventative measures, like sleeping under a long-lasting insecticide treated bednet).

Thailand unfortunately has seen the emergence of resistance to a couple widely used prophylactic measures, namely chloroquine and mefloquine (sold as Lariam), so these are not appropriate preventative medicine in this region. Instead, you should consider taking doxycycline or atovaquone-proguanil (sold as Malarone).