LABI MUPEPE1,2*, BAGUMA ALIMBA Patrick3, BWANGA BWANGA Serge2, MEYA KOY Jean- Paul2, BALANGA MACHAFU Roger2, MAWA MBANGI4, SADEL NILONG Jacqueline2

Comparative analysis of certified and “all-coming” seeds

The aim of this work was to evaluate the quality of corn (maize), groundnut and cowpea (black-eyed pea) seeds bought on the market and used as seeds by farmers in the hinterland of Kinshasa. The evaluation method focused on the determination of water content, specific purity and germination capacity of these seeds according to the protocols used at the National Seed Laboratory in Kinshasa. The results of the quality analyses showed that the “all-coming” seeds globally had less seed quality, compared to certified seeds.

The average results showed that the "all coming" seeds had a humidity content of 11.60%; a specific purity of 93.92% and a germination capacity 61.33%, whereas certified seeds had respectively the values of 10.71%, 98.26 and 88.33%. These values allow us to conclude that’’ all coming’’ seeds contain impurities. In addition, one out of two seeds bought on the market and used as usable seed do not germinate. This situation is a loss for the farmer who uses them as reliable seeds, as the rate of purity (specific purity) and germination capacity are weak. Hence, the use of the certified seeds must be recommended. Télécharger l'article

KASONGO MUNYINGA Yvonne*, LEMA-KI-MUNSEKI Albert, LUMPUNGU KABAMBA Christophe, BANGATA BITHA NYI MBUNZI Jean Christian

Evaluation of loss of common bean seed by bruchs (Acanthoscelides obtectus Say) during bruchs breeding under laboratory conditions.

This study aims to evaluate the loss and to specify the importance of the damage done by bruchs on common bean. A hog mass culture is carried out, under laboratory conditions. The breeding was conducted during 5 weeks by seeding 15 pairs of weevils in 30 g of common bean seeds in 11 petri dishes; the control was a Petri dish with 30 g of bean seeds without insects. The results obtained show that: in the control Petri dish, the bean seeds kept their weight whereas in the 11 seeded petri dishes the mass of weevil increased from 0.133 to 2.299 g and their average number rose from about 30 to 519 weevils. The average loss of the bean seed mass is estimated at 33.20%, from 30.223 g to 20.166 g. The damage caused by the weevil, in breeding, expresses by the weight loss, is accompanied by the deterioration of the commercial quality of common bean seeds. Télécharger l'article

NSALAMBI NSUKA Steve1,2,4*, KABAMBA MWAMBA Matthieu Willy4, MBALE PEMBELE Yves6, KABAMBI NGABU Prosper1, MAKUMBU LUBAMBA Trésor3, MPIANA TSHIPAMBE Serge3, MASUMU MULUMBU Justin2,3,4,5

Identification and ecology of tick infesting cattles and sheeps in savannahs and Forest ecosystems in western Democratic Republic of Congo

An investigation was conducted in two ecosystems (savannas and forests) in western DRC to identify tick species circulating in cattle and sheep in order to update tick mapping in this part of the country, to assess their abundance and the risks they can cause on these animals, in order to propose a control program adapted to local conditions. These investigations were conducted at the Batéké Plateau (Savannah Zone) and the Mushie Ranch (Forest Zone) for six months, from November 2012 to April 2013. Out of 938 ticks harvested, three types were recorded using identification keys; they are Amblyomma sp (89.1%), Rhipicephalus sp (10.5%) and Hyalomma sp (0.4%). A strong predominance of Amblyomma variegatum was observed in both ecosystems. Thus, the three genera identified were present at the Batéké Plateau, whereas only one genus (Amblyomma) was found in Mushie and on animals, most ticks were collected on the ventro-genital part (75%). These results could already be a breach for updating tick mapping in western DRC.

Good breeding behavior and weekly application of acaricides on animals in the form of bathing or spraying are solutions considered in the first line in the fight against ticks. Télécharger l'article

KIBADI VANGA Moïse1*, MALONGA Bertne2, MUKWELA MUTEKISEL Marie3

Divagation local hens’ gastro-intestine parasites in OTT an entity in Ngulunzamba quarter, Kikwit city, Democratic Republic of Congo.

This study of hens parasites in incubators (breeders), raised in traditional mode in Kikwit Bulwen region, took place from November 2015 to May 2016. Out of 36 hens euthanized and examined for the purpose of identifying helminths, parasites in small intestine, the following helminths were identified:1 species of nematodes: Ascaridia galli ;1 species of cestodes: Davainea proglottina; 1 mixed species of parasites: Ascaridia galli and Davainea proglottina.

The infestation and parasitism rates varied from one species to another. Davainea proglottina was the most dominant.

Twenty- two (22) cases out of 36 were infested whereas 14 hens (39 %) were found without parasites. The diversified fauna of parasites was made of cestodes (33% prevalence), nematodes (17%), and a mixed species of parasites or polyparasitarian cestodes-nematodes (11%); with a global rate of 61%. The variables sex, weight, place of origin did not influence the infestation except the season which had a positive influence. The statistical result did not show a significant difference p<0.05 for the parameters studied, except for the season. Télécharger l'article

MBEKO PONGOMBO Andre1*, MALEGELA ILUNGA Leon2, KAPOUR KIENG Germain3,4, TUAKUILA KABENGELE Jöel5, MASUMU MULUMBU Justin2, KIMPANGA DIANGS Prince5.

Spatial distribution of neglected tropical diseases in the Haut-Uele province in the Democratic Republic of Congo.

The Neglected Tropical Diseases (NTDs), diseases of poverty, are prevalent in low-income regions around the world. They are grouped into two classes, those for case management and those preventable by preventive chemotherapy. They cause a high morbidity that can be visible or hidden.

The overall objective of this work is to describe the spatial distribution of NTDs, mainly Lymphatic Filariasis, soil-transmitted helminthiasis, and schistosomiasis in Haut Uele province. This is a retrospective cross- sectional study conducted in 2015. Thirteen (13) Health Zones of Haut Uele provincial Health Division were involved in the study. The data used are those related to three NTDs . They were organized in an Excel spreadsheet and the software QGIS 2.2, 0 allowed to generate the cards.

The Rungu health zone is most affected by Lymphatic Filariasis (TA: 0.8427 to 1.2321) followed by two other health Zones, Niangara and Faradje (TA: 0.4539 to 0.8426). Isiro, Niangara and Faradje health zones are the most affected by soil-transmitted helminthiasis (TA: 0.894). Isiro health zone is more affected by schistosomiasis (TA> 1.9958).

The majority of health zones are co-infected by these three NTDs. Understanding their spatial distribution will enable policy makers and intervention partners to target these challenges and implement NTDS awareness and management programs. Télécharger l'article

N’SINABAU EYAY Raïs1*, KASONGO MADIBULAYA Moïse1,2, MESOPAMBA KIANA Jacques1, AMULI KABALI Sophie1, MBUMBA MPANYA Valentin1, MUYUKU MUSEMA Lionel1

Antibiotic prophylaxis and surgical site infection at N'djili general reference hospital/ ISTM-Kinshasa

Antibiotic prophylaxis, also known as antibioprevention, is the use of an antibiotic for therapeutic purposes to prevent the occurrence of a potentially dangerous infection. The aim of this study is to estimate the infection rate at the surgical site (ISO) in clean and clean contamined surgery after antibiotic prophylaxis and in precarious environment. The present study was conducted at the reference general hospital of N’djili from March 1st, 2017 to March 30th, 2018 from 253 patients. Among the 83 who complied with antibiotic prophylaxis, 689 were female with a sex ratio of 0.20 for females. Infection at the operation site occurred in 4.8% of cases receiving antibiotic prophylaxis. The cumulative percentage of surgical site infections was 8.3%. The rate of surgical site infections after antibiotic prophylaxis is close to the incidence of ISO in sub-Saharan Africa. Télécharger l'article

MUANZA KANT Patrick1*, MPIANA KENABABU Charles2, KANDA NKULA Valentin1

Lithostratigraphic and sedimentological study of the Kimbungu massive in the Kongo- Central province.

The lithostratigraphic and sedimentological survey of rocks belonging to the summit of Sansikwa sub- group at Kongo- Central allows to describe the true facies of these rocks, the sedimentary model, the intrusions found and the cartographic consequences of all observations made in the region. The sedimentary rocks of Kimbungu massive have not been an object of a thorough survey or detailed. They have been mapped on the geological map of the region as being the low diamictit. The field work shows that it is not Diamictite but rather a shale. In fact, analyzes of this rock shows that it has a fine granulometry, a dark grey color and contain a high proportion in total carbon [> 5%]. It is almost composed of quartz angular to subangular forms swimming in clay or clay-micritic matrices and enclosed by pyrite. In the outcrop, some sedimentary structures of erosion and deposits are observed. This description corresponds to the one of shale. The characteristics described above and the extension of this shale suggest that it could have been deposited in a marine environment close to the coast with a possibility of enriching in carbonate and organic matter by the phenomenon of marine transgression. Doleritic intrusions were set up by tectonic activity [rifting] during the Middle Neoproterozoïc causing the sea transgression as well as the cleft volcanism. The Kimbungu massive is only occupied by the rocks with pelitic facies that we have described as the “shale”. This has led us to propose the modification of the geological map of Kimbungu region and its legend. Télécharger l'article

Michel KIMUHA KIRUMBA* and Richard VALL RICARDO

This study investigates experimentally the uniaxial stress-strain behavior of reinforcing steel bars under various low strain rates, quasi-static from 0.001 12 s-1 to 0.006 70 s-1. The main objective of these tests was to give an indication of the effect of the low strain rate variation on the uniaxial, monotonic, stress-strain, elongation-strain, section reduction-strain curves of reinforcing steel bars. The results of the tensile tests indicate that the yield strength and the ultimate tensile strength of reinforcing steel bars increase as the strain rate increases; while the elongation and section reduction of reinforcing steel bars do not appear to be substantially affected by the low strain rate variation. It was also observed that the smaller reinforcing steel bars were more affected by low strain rate variation, although sometimes inconsistently, than the relatively bigger ones. Thus, one should be more precautious while testing smaller reinforcing steel bars. Furthermore, a new regression formula is proposed for both yield strength and ultimate tensile strength with an “R squared” of 80%. This formula may be used as a means by which some quick verifications and checking may be done. Télécgarger l'article

DIANGITUKULU NDIMBA Samuel* et MUSESA LANDA Alain

Lie-Rinehart Algebra Structure on the Leaf Space
We consider a transversally oriented foliation ℱ defined on a smooth manifold 𝑀. In this paper, wedenote by 𝑀/ℱ the leaf space of ℱ, 𝐶𝑏∞(𝑀, ℱ) its ring of basic functions, 𝑙ℱ(𝑀) its 𝐶𝑏∞(𝑀, ℱ)-module of the transverse vector fields on 𝑀/ℱ and 𝐷𝑖𝑓𝑓ℝ[𝐶𝑏∞(𝑀, ℱ)] the 𝐶𝑏∞(𝑀, ℱ)-module of differential operators of order
≤ 1 of 𝐶𝑏∞(𝑀, ℱ). We establish that if ℱ is a simple foliation on 𝑀, its leaf space 𝑀/ℱ is provided with a LieRinehart algebra structure and let us deduce from it that it is not possible to provide the leaf space 𝑀/ℱ of a Lie-Rinehart algebra structure if ℱ is not simple. Télécharger l'article