Nutrients and Plankton Biomass in the Rift Lake Sources of the White Nile: Lakes Albert and Edward

Plasmodium falciparumis a predominant malaria species that infects humans in the African continent. A recent WHO report estimated 95% and 5% ofP. falciparumandP. vivaxmalaria cases, respectively, in Sudan. However many laboratory reports from different areas in Sudan indicated otherwise. In order to verify, we selected four hundred suspected malaria cases from Aljabalain area located in the White Nile state, central Sudan, and diagnosed them with quality insured microscopy and species-specific nested PCR. Our results indicated that the proportion ofP. vivaxinfections among suspected malaria cases was high. We found that on average 20% and 36.5% of malaria infections in both study areas were caused byP. vivaxusing both microscopy and PCR, respectively. This change in pattern is likely due to the recent demographic changes and high rate of immigration from neighbouring countries in the recent years. This is the first extensive clinical study of its kind that shows rising trend inP. vivaxmalaria cases in White Nile area, Sudan.

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Response of heterotrophic and autotrophic microbial plankton to inorganic and organic inputs along a latitudinal transect in the Atlantic Ocean

Biogeosciences ◽

10.5194/bg-7-1701-2010 ◽

2010 ◽

Vol 7 (5) ◽

pp. 1701-1713 ◽

Cited By ~ 22

Author(s):

S. Martínez-García ◽

E. Fernández ◽

A. Calvo-Díaz ◽

E. Marañón ◽

X. A. G. Morán ◽

...

Keyword(s):

Organic Matter ◽

Atlantic Ocean ◽

Bacterial Growth ◽

Heterotrophic Bacteria ◽

Growth Efficiency ◽

Bacterial Growth Efficiency ◽

Organic Nutrient ◽

Plankton Biomass ◽

Latitudinal Transect ◽

Microbial Plankton

Abstract. The effects of inorganic and/or organic nutrient inputs on phytoplankton and heterotrophic bacteria have never been concurrently assessed in open ocean oligotrophic communities over a wide spatial gradient. We studied the effects of potentially limiting inorganic (nitrate, ammonium, phosphate, silica) and organic nutrient (glucose, aminoacids) inputs added separately as well as jointly, on microbial plankton biomass, community structure and metabolism in five microcosm experiments conducted along a latitudinal transect in the Atlantic Ocean (from 26° N to 29° S). Primary production rates increased up to 1.8-fold. Bacterial respiration and microbial community respiration increased up to 14.3 and 12.7-fold respectively. Bacterial production and bacterial growth efficiency increased up to 58.8-fold and 2.5-fold respectively. The largest increases were measured after mixed inorganic-organic nutrients additions. Changes in microbial plankton biomass were small as compared with those in metabolic rates. A north to south increase in the response of heterotrophic bacteria was observed, which could be related to a latitudinal gradient in phosphorus availability. Our results suggest that organic matter inputs will result in a predominantly heterotrophic versus autotrophic response and in increases in bacterial growth efficiency, particularly in the southern hemisphere. Subtle differences in the initial environmental and biological conditions are likely to result in differential microbial responses to inorganic and organic matter inputs.

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The role of scientific research in achieving economic development Applied to White Nile state- Sudan (2015- 2018): دور البحث العلمي في تحقيق التنمية الاقتصادية دراسة ميدانية في ولاية النيل الأبيض – السودان (للفترة من 2015م - 2018م)

المجلة العربية للعلوم ونشر الأبحاث مجلة العلوم الاقتصادية والإدارية والقانونية ◽

10.26389/ajsrp.b191219 ◽

2020 ◽

Vol 4 (7) ◽

Author(s):

Mahdi Abdalla Mohamed, Musa Abdalla Mohamed

Keyword(s):

Economic Development ◽

Statistical Analysis ◽

Scientific Research ◽

Analysis Method ◽

Important Target ◽

Statistical Analysis Method ◽

White Nile ◽

Descriptive Method

The study is focusing on the factors which are leading to know the weakness link between the scientific research and economic development in the White Nile state. The important target of the study is to determinate the role of scientific research in the economic development. The study dependence on the statistical analysis method, historical and descriptive method. It aims to collect information related to the problem. The most important result of the study that state has significant savings in production. The most important recommendations of the study the necessity of using scientific research to achieve economic development.

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Comparison of the Change in the Prevalence and Intensity of Schistosoma haematobium Infection Between High and Low Prevalence Areas of White Nile State, Sudan

The Korean Journal of Parasitology ◽

10.3347/kjp.2020.58.4.421 ◽

2020 ◽

Vol 58 (4) ◽

pp. 421-430 ◽

Cited By ~ 1

Author(s):

Seungman Cha ◽

Sung-Tae Hong ◽

Jin-Su Lee ◽

Hoo Gn Jeong ◽

In-Sun Kwon ◽

...

Keyword(s):

Primary Schools ◽

Schistosoma Haematobium ◽

Geometric Mean ◽

Infection Intensity ◽

Baseline Survey ◽

Relative Reduction ◽

Cross Sectional Survey ◽

Cross Sectional ◽

Significant Difference ◽

White Nile

This study aimed to investigate whether mass drug administration (MDA) intervention has an equivalent effect on reducing the prevalence and intensity of Schistosoma haematobium infection regardless of the baseline values. A repeated cross-sectional survey was performed targeting students of 12 primary schools in Al Jabalain and El Salam districts of White Nile State, Sudan, at both 1 week before and 8 months after the MDA. Prior to the baseline survey, school-aged children in Al Jabalain had received MDA interventions twice in 4 years, while those in El Salam had not. The baseline prevalence was 9.1% in Al Jabalain and 35.2% in El Salam, which were reduced to 1.8% and 5.5% at 8 months after the MDA, respectively. The corresponding reduction rates were 80.3% and 84.4%, not significant difference between both districts. However, changes in the geometric mean intensity (GMI) of egg counts were significantly different between both districts. The baseline GMIs were 14.5 eggs per 10 ml of urine (EP10) in Al Jabalain and 18.5 EP10 in El Salam, which were reduced to 7.1 and 11.2 EP10 after treatment, respectively. The corresponding reduction rates were 51.0% and 39.5%. In conclusion, MDA interventions were found to bring about similar relative reduction in prevalence regardless of the baseline value; however, the relative reduction in infection intensity was more salient in the district with a low baseline value for both prevalence and intensity. This clearly points to the importance of repeated MDA interventions in endemic areas, which will eventually contribute to schistosomiasis elimination.

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