Sida acuta Burm.f. (Fam. Malvaceae) is used in Siddha system of
medicine and in folk medical practice in Tamil Nadu under the
names Arivalmooku pachilai or vattatiruppi. The leaves of this
plant are used for their diuretic, demulcent, anthelmintic and
wound healing properties. The present paper discusses the
anatomy of petiole leaf and stem, microscopic constants,
physico-chemical standards and fluorescence analysis of the
drug. Many bacteria among the Enterobacteria family are involved
in infectious diseases and diarrhoea. Most of these bacteria
become resistant to the most commonly used synthetic drugs in
Cameroon. Natural substances seem to be an alternative to this
problem. Thus the aim of this research was to investigate the in
vitro antibacterial activity of the methanol and aqueous-
methanol extracts of Sida rhombifolia Linn (Malvaceae) against
seven pathogenic bacteria involved in diarrhoea. Acute toxicity
of the most active extract was determined and major bioactive
components were screened. The agar