Growth response of O1 and non O1/non O139 strains to algae extracts from stream water in far north Cameroon.

Background And Objectives: O1 or non O1/non O139 is found in water ecosystems where it colonizes phytoplankton and has different lifestyle. This study aimed to investigate the impact of some algae extracts on the survival/growth of both strains.

Materials And Methods: Algae extracts consisting of three fractions, F1 containing chlorophyll-a, F2 containing chlorophyll-b, and F3 containing carotenoids, and raw extract (RAE) were obtained from the algal bloom collected in the Kaliao stream (Maroua, Cameroon).

Unpredictable chronic mild stress induced anxio-depressive disorders and enterobacteria dysbiosis: Potential protective effects of Detariummicrocarpum.

Ethnopharmacological Relevance: Detarium microcarpum Guill. & Perr. is used traditionally in Far North Cameroun to treat stomach aches, anxiety, epilepsy, and other mental disorders.

Low prevalence of HIV in the northern Cameroon: contribution of some AIDS restriction genes and potential implications for gene therapy.

Background: HIV infection and its progression to AIDS depend on several factors including host genetic factors. The immunological mechanisms of host resistance to HIV infection greatly influence the prevalence of HIV in a given region. Worldwide, Cameroon not exempted, the frequency of AIDS-associated genes varies and may influence this prevalence.

Myxaoside A, a new triterpenoid saponin from L. (Boraginaceae).

The phytochemical study of L. led to the isolation, through chromatographic techniques, of a new triterpenoid saponin, 3--[--rhamnopyranosyl-(1→3)-(6--acetyl---glucopyranosyl)]-22-hydroxyolean-12-ene () namely Myxaoside A, together with three known compounds, Soyasaponine I (), oleanolic acid (), and 3--acetyl-oleanolic acid (). All structures were established, based on 1 & 2D-NMR spectroscopic analysis and comparison with previous published reports.

Chemical constituents from L. (Boraginaceae) and their antibacterial activity.

Chemical investigation of L. (Boraginaceae) resulted in the isolation of the following ten known compounds: 1-naphthaleneacetic-5-carboxy-1,2,3,4,4a,7,8,8a-octahydro-1,2,4a-trimethyl-[1-(1,2, 4a,8a)]-acid (), hexacosanoate-1-glyceryl (), 3-urs-12,20(30)-diene-27,28-dioic acid (), 3-D-glucopyranosylurs-12,20(30)-diene-27,28-dioic acid (), stigmasterol (), stigmasterol-3---D-glucopyranoside (), oleanolic-acid (), 3--acetyl-oleanolic acid (), betulin () and spinasterol-3--D-glucopyranoside (). The isolated compounds were characterised by using spectroscopic methods, 1D and 2D NMR, mass spectroscopy (ESI-MS) and by comparison with the literature data.

Ternifoliasaponin, a new triterpenoid saponin from the roots of Schumach & Thonn (Rubiaceae).

A new triterpenoid saponin, Ternifoliasaponin (), together with four known compounds () chikusetsusaponin IVa (), chikusetsusaponin IVa methyl ester (), bonushenricoside B ) and Dianoside C () were isolated from roots of Schumach. & Thonn (Rubiaceae). The structures of isolated compounds were elucidated on the basis of spectroscopic analysis and chemical methods.

[Diversity of synanthropic flies and their potential for transmitting diarrheal diseases in Maroua (Far North- Cameroon)].

Introduction: synanthropic flies are sometimes involved in the transmission of diarrheal diseases as mechanical vectors of pathogenic bacteria. The purpose of this study was to assess the diversity of synanthropic flies and to determine their potential involvement in the transmission of diarrheal diseases in the city of Maroua.

Methods: fly catching sessions were carried out per season in 12 wards, in five different sites and in three moments of the day, corresponding to the different daily sunshine hours.

Survival and Growth of Vibrio cholerae, Escherichia coli, and Salmonella Spp. in Well Water Used for Drinking Purposes in Garoua (North Cameroon).

The ability of strains of faecal bacteria (Vibrio cholerae, Escherichia coli ATCC 25922, and four strains of Salmonella isolated, resp., from well water, pig, poultry, and human urine in Garoua) to survive or grow in well water microcosms was compared. Water samples were obtained from two wells in Garoua (north Cameroun).