Malaria Parasite Stool

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Перевести · 28.12.2014 · The apparently insoluble problem – how can you adequately study the evolution of malaria parasites, if you can’t test blood from apes? – was unexpectedly solved by a group of scientists far better known for their work on a very different human pathogen, HIV. Dr. Beatrice Hahn and her lab (University of Pennsylvania) had been working on trying to elucidate the origin of HIV, and had realized that they could analyze HIV-like viruses in apes… by looking at feces…
https://www.walldiscover.com/malaria-parasite-stool/d9hhdC1hcmUtbWVsZW5pYy1zdG-vbHMtd9...
Перевести · We've gathered our favorite ideas for Malaria Parasite Stool, Explore our list of popular images of Malaria Parasite Stool and Download Every beautiful wallpaper is high resolution and free to use. Download for free from a curated selection of Malaria Parasite Stool …
https://www.intechopen.com/chapters/62893
Перевести · The calculated average parasitic loads revealed 3089.2 tpz/μl of blood (95% CI, 591.1–5587.3) for malaria, 6.5 eggs per gram of stool (95% CI, 0.4–13.4) for intestinal helminths, and one (1) parasite …
https://advances.sciencemag.org/content/7/27/eabd6232
Перевести · 01.06.2021 · P. yoelii parasite stock was obtained from the Malaria Research and Reference Reagent Resource and was maintained and expanded by passage through CD-1 mice. Blood from multiple CD …
https://www.cdc.gov/dpdx/diagnosticprocedures/index.html
Перевести · 17.06.2019 · Stool Specimens. Key Points for Laboratory Identification of Cyclospora sp., Cryptosporidium sp., and Cystoisospora belli pdf icon [PDF, 109 KB] Key Points for Laboratory Diagnosis of …
https://www.cdc.gov/dpdx/diagnosticprocedures/blood/microexam.html
Перевести · 03.05.2016 · If this information is needed by the physician, malaria parasites can be quantified against blood elements such as RBCs or WBCs. To quantify malaria parasites against RBCs, count the parasitized …
https://apps.who.int/iris/bitstream/handle/10665/119362/9_5-6_2003_1048_1053.pdf?...
1048 La Revue de Santé de la Méditerranée orientale, Vol. 9, No 5/6, 2003 Malaria and intestinal parasitosis among children presenting to the Paediatric Centre in Sana’a, Yemen A.A. Azazy 1 and Y.A. Raja’a 2 1Department of Parasitology…
https://cddep.org/tool/life_cycle_malaria_parasite
Перевести · Transmission of malaria occurs through a vector, the mosquito, that ingests gametocytes the sexual form of the parasite when feeding on an infected human. Gametocytes, which are both male and female, …
https://apps.who.int/iris/rest/bitstreams/1339266/retrieve
5. After counting all the parasites and white cells in one field, move to the next, and repeat the counting procedure, and so on. 4.1. Performing a parasite count on a thick film and calculating parasite density Note: Before starting counting, examine 100 fields of the thick film to detect the presence of malaria parasites …
https://journals.plos.org/plosntds/article?id=10.1371/journal.pntd.0006801
Перевести · 06.12.2018 · Malaria is one such example where the parasite ( Plasmodium) causing malaria in humans has originated from non-human primate populations. To understand origin and evolution of human malaria parasites it is important to know the diversity and evolutionary relationships of these parasites …
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By Gaoussou Coulibaly, Kouassi Patrick Yao, Mathurin Koffi, Bernardin Ahouty Ahouty, Laurent Kouassi Louhourignon, Monsan N’Cho and Eliézer Kouakou N’Goran
Submitted: April 17th 2018Reviewed: June 21st 2018Published: April 24th 2019
A prospective study was carried out from 2010 to 2012 at the Hôpital Général d’Abobo (HGA) in Abidjan, in order to determine the impact of infectious and parasitic diseases on child cognitive development. Blood samples were examined by means of drop thick and blood smear, as for stool by direct examination and concentration by formalin-ether method. We evaluated the prevalence and the parasite load of malaria and gastrointestinal parasites and then investigated the risk factors for these disorders. Overall, 331 pregnant women in the last trimester of their pregnancy were enrolled. The plasmodic index was 3.9% with an infestation specific rate for P. falciparum of 100%. Concerning digestive protozoa, it has been observed 71.3% of nonpathogenic, against 9.7% of pathogens, either an overall prevalence of 51.4% of digestive parasites. The calculated average parasitic loads revealed 3089.2 tpz/μl of blood (95% CI, 591.1–5587.3) for malaria, 6.5 eggs per gram of stool (95% CI, 0.4–13.4) for intestinal helminths, and one (1) parasite by microscopic field for protozoa (common infestation). It has been shown that the occurrence of malaria has been linked to the nonuse of impregnated mosquito nets (χ2 = 0.012, p = 0.018) to age. No link could be established between the presence of digestive parasites and the age of pregnant women or socioeconomic conditions (level of education, profession, type of toilet). Malaria is less common in pregnant women, while the rate of digestive parasites remains high.
Keywords
Abidjan
Côte d’Ivoire
intestinal parasites
malaria
pregnant women
*Address all correspondence to: gaoussoubrava@yahoo.fr
Parasites and Parasitic DiseasesEdited by Gilberto Antonio Bastidas Pacheco
Intestinal parasitosis and malaria remain the most important diseases in sub-Saharan Africa [1, 2]. With hundreds of millions of sick people every year and about three million deaths per year, intestinal parasites and malaria remain the most important diseases in sub-Saharan Africa and mainly affect children and pregnant women [3, 4].
In pregnant women, these parasitic infections cause maternity accidents such as premature births, maternal-fetal death, and malformations [5, 6, 7].
In Côte d’Ivoire, malaria is the main cause of morbidity (40%) and mortality (10%) in the general population. Children under 5 years and pregnant women are the most affected. In addition to malaria, Côte d’Ivoire is facing other diseases such as intestinal parasitosis.
Long rural the tropical countries are confronted with the urban growth, with the biggest upheavals of the lifestyles of its history. Urbanization rate increased from 27.3% in 1975 to 49% in 2000 according to the United Nations estimates [8]. This represents an increase of about 1.3 billion people. Cities on the African continent are currently experiencing the strongest growth. The urbanization rate, which was only 13.2% in 1950, exceeded 37% in 2000, i.e., 270 million more urban dwellers [9]. This was the case for the city of Abidjan, the economic capital of Côte d’Ivoire, and more precisely in the municipality of Abobo. The urbanization of this town, which began in the 1970s, is so fast that nowadays Abobo already has more than one million inhabitants. However, infrastructure development has not kept pace with these rapid changes. In this context, precarious housing areas focus on pathologies linked to promiscuity, insalubrity, lack of drinking water supply, and/or poverty; these diseases are intestinal parasitosis and malaria [10, 11]. Moreover, it must be noted that few studies have been carried out on these parasites and particularly on pregnant women in this municipality. As part of a research project on the impact of infectious and parasitic diseases on the physical and mental development of children, pregnant women were followed up. The work consisted of evaluating the prevalence, parasite load of malaria, and digestive parasites and then determining risk factors of these parasitic infections in pregnant women in Abobo district in Abidjan.
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Our prospective study, which took place from May 2010 to June 2012 at the General Hospital of Abobo (GHA) in Abidjan, involved 331 pregnant women recruited in the last quarter of pregnancy; these future mothers all provided informed consent before being included in the study. They were aged 18–46 years. The mothers were recruited during antenatal clinic visits by gynecologists. Detailed explanations of the study were given by them in local languages if necessary.
The fact sheets on the socioeconomic status and study of risk factors have been met by community health workers (CHWs) in an interview with the mother following the signing of informed consent. It includes information on factors favoring the transmission of these parasites, namely, age, type of neighborhood, level of education, occupation, type of toilet, and use or not of impregnated mosquito nets.
A blood sample of 5 ml was taken from patients by nurses, in a labeled EDTA tube (patient ID number) by venipuncture in the antecubital fossa, after disinfection of the sampling region by ethyl alcohol. Blood samples were stained in a solution of 10% Giemsa and microscopic reading of immersion oil at a magnification of 100. In the positive case, the parasitic identification was carried out on thin film, and parasite densities were evaluated from the thick drop of 200 or 500 leukocytes. Individual values obtained for parasitemia were finally reduced to microliter (1 μl) of blood on the basis of 8000 leucocytes by taking the product of the number of parasites obtained by 40 or 16, respectively, for 200 or 500 erythrocytes [12, 13].
A box for the stool sample was given to the mothers, and they were asked to return the next morning at the hospital with the boxes containing feces. The stools collected in the morning were labeled with the patient ID and were the subject of a direct microscopic examination between slide and cover glass. In addition, 1–1.5 g of stool was placed into a falcon tube containing 10 ml of sodium acetate–acetic acid formalin (SAF) solution, broken and homogenize with a wooden spatula and vigorously shaken. Within 1 month of stool collection, the SAF-fixed samples were subjected to an ether concentration method [14]; the SAF-fixed stool samples were re-suspended and filtered through medical gauze placed in a plastic funnel into a centrifuge tube. The first centrifugation is made at 2000 towers/min for 1 min. After centrifugation, the supernatant was discarded, and 7 ml of 0.9% NaCl plus 2–3 ml of ether was added to the remaining pellet. After shaking for 10–30 s, the tube and its content were centrifuged for 4–5 min at the same speed. Finally, from the four layers formed, the three top layers were discarded. The bottom layer, including the sediment, was examined under a microscope. With regard to the parasite load, the exact number of eggs of each species of helminth was marked; the presence of a species of protozoan was mentioned by a positive (+) sign. The number of + ranges from 1 to 3 depending on the intensity of the parasite. Indeed, 1+ corresponds to 1–5 parasites per analyzed microscopic slide, 2+ 1 parasite per microscopic field, and 3+ more than 1 parasite per microscopic field.
MS Excel software was used for entering data collected (parasitological data and those fact sheets) and perform figures.
Descriptive analysis was done to describe the data as counts, percentages, averages, using tables and figures. Statistical tests were carried out with the Stata software 11.0.
The chi-square test (χ2) allowed us to appreciate the link between the occurrence of malaria and/or helminth infections and exposure factors (age, use of non-treated nets, socioeconomic conditions). The value of the probability (p) showed the degree of significance of the links at the 0.05 level. The Fisher exact test was used for small numbers (more than 5% of the theoretical frequencies less than 5).
The study conditions have been reviewed and approved by the National Ethics and Research Committee of Côte d’Ivoire (N ° 4169/MSHP). Detailed explanations of the study were given to mothers in local languages, if necessary. The participation was voluntary. When the mother consented, she signed or affixed a fingerprint on the informed consent sheet.
The study included 331 pregnant women from 13 neighborhoods in Abobo commune. The average age was 28.9 years old. The largest group of women was between 28 and 32 years old (31.7%) (Figure 1).
Distribution of population according to age.
After the blood and stool examinations, 157 (47.4%) women presented no parasite. Four (4) women (1.2%) presented plasmodium, 161 (48.6%) digestive parasites, and nine (9) (2.7%) both parasites (Table 1).
Distribution of participants according to the results of blood tests and stool.
In total 13 women presented a positive thick smear of Plasmodium sp., with a parasite rate of 3.9%. Parasite mean of Plasmodium falciparum is 3089.2 trophozoїtes/μl of blood with a minimum of 360 trophozoїtes/μl and maximum of 13,400 trophozoїtes/μl. The highest prevalence (12.5%, 2/16) was recorded with the age group of 38 years and older and the lowest (1.2%, 1/83) with that of 23–27 years. The differences in prevalence observed between age groups are not statistically significant (χ2 = 5.11, p = 0.276). Infestation of P. falciparum is not age-related. Women not using treated nets are much more infested (6% 12/200) than those using insecticide (0.8%, 1/131). The parasitic porting is influenced by the use of treated mosquito nets (χ2 = 0.012, p = 0.018). Women not using bed nets are the most vulnerable to malaria (Table 2).
Prevalence of malaria according to the use or non-use of insecticide-treated bed nets.
After stool examinations, eight (8) species of intestinal protozoa belonging to six (6) different kinds were diagnosed in Abobo. These are Entamoeba histolytica/dispar, Giardia lamblia, Endolimax nana, Entamoeba coli, Iodamoeba butschlii, Chilomastix mesnili, Entamoeba hartmanni, and Blastocystis hominis. The term “Entamoeba histolytica/dispar” was used because the method used for stool examinations did not allow to distinguish the species Entamoeba histolytica and Entamoeba dispar.
In addition to these protozoa, three species of helminths were observed: Schistosoma mansoni, Trichuris trichiura, and Ascaris lumbricoides. Of the 331 women screened, 170 were carriers of digestive parasites, with an overall prevalence of 51.4%. The prevalence of species of digestive parasites (pathogenic and nonpathogenic protozoa of digestive and intestinal helminths) is presented in Table 3. With protozoa, the highest prevalence was observed with Entamoeba coli (31.4%, 104/331) and Endolimax nana (16.9%, 56/331). Concerning intestinal helminths, in the three species, Schistosoma mansoni was the most abundant with a prevalence of 2.7%. In terms of parasite load protozoa, the trend observed in our study was 2+, namely, 1 parasite per microscope field, the latter being described as frequent infestation. As regards the helminths, the average worm burden was 7.8 eggs/gram of feces. The most infested age group is that of 23–27 years (59%, 49/83), while the least infested was that of 18–22 years (45.1%, 23/51). Age had no significant association with gastrointestinal parasites (χ2 = 3.77, p = 0.438). These parasites infest all age groups. No significant binding was recorded between the digestive parasites and level of schooling (χ2 = 6.88, p = 0.76), occupation (χ2 = 2.66, p = 0.103) (Table 5), and the type of toilets (χ2 = 1.57, p = 0.456). The occurrence of intestinal parasites is not related to the socioeconomic conditions.
Prevalence of intestinal parasites species.
We examined 331 pregnant women of which 13 showed positive thick smear, with a parasite rate of 3.9%. Menan et al. [15] had reported in 1996 had a higher prevalence of 18.8% among the population of Abidjan. Our low rate could be explained by the fact that pregnant women receive intermittent preventive treatment (IPT) with sulfadoxine-pyrimethamine (SP) against malaria during pregnancy.
P. falciparum has been the only species identified during our work with a specific index of 100%. During these works in Côte d’Ivoire [16, 17], all cases of infection were also due to P. falciparum. By cons, it was highlighted at Taї southwestern Côte d’Ivoire the coexistence of P. falciparum, P. malariae, and P. ovale with specific rates of 84, 14, and 2% [18]. These studies highlight the prevalence of P. falciparum in Côte d’Ivoire (80–97% of infections) [19, 20].
The minimum parasitemia is 360 tpz/μl and the maximum 13,400 tpz/μl of blood. The average parasite density was 3089.2 tpz/μl of blood during the study. Our low parasite density could be explained by the fact that we have a gradual reduction in parasite densities with age [19]. Furthermore, it was suggested that the gradual decline in parasite densities with age is associated with the acquisition of immunity [21].
Our study revealed that the incidence of malaria is not related to age of the pregnant woman. This observation is similar to that of Menan et al. [15] in 1996 at the Abidjan population.
It appears from our study that there is a link between malaria and the use or non-treated nets. Women using treated nets are much less infested than those not using bed nets. Furthermore, the use of treated nets is a means of prevention against malaria [22].
During our study, slightly more than half of pregnant women were carriers of digestive parasites (pathogenic and nonpathogenic protozoa and intestinal helminths), with a rate of 51.4%. This rate is similar to that reported in pregnant women fr
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