Lactobacillus - A Gm +ve beneficial microbe resposible for the synthesis of Vit -B 12 in our cholon . For cholities / ameobiosys Lactobacillus therapy is a kind of PROBIOTIC MEDICINE .

Dr Zemali , you didnot clarify which pathogens you want to ask, weather these are plant pathogens or human pathogens. In plant pathogens , Xanthomonas is most common. in human pathogens, enteric group of bacteria are quite common. These include Closritidium, Salmonella, Shigella etc. Other pathogens include Mycobacterium, Klebsiella and some spore forming cocci. Clostridium tetani causes tetanus, Mycobacterium causes tuberclosis and Salmonella causes food poisoning. Some strains of E. coli are also gas formers and harmful to human beings.

Microbes required are: Salmonella, K.p, Staphylococcus, Pseudomonas, Erichia coli, terobacter, Stenotrophomonas

Escherichia coli is one of the commonest bacterial pathogen on which lot of work has been done. Staphylococcus and Pseudomonas are second to none.

For Staphyloccus common biochemical tests you can put catalase, coagulase (slide and tube), DNase, Phosphatase, Mannitol fermentation. You can put as many biochemical tests but not required like Citrate, Urease, Gelatin hydrolysis, Nitrate reduction, Methyl red, VP, OF test, Glucose, Galactose, Fructose, etc.

Basic Biochemical for E.coli will be IMViC, Motility, Catalase, Nitrate Reduction, Urease, Sugar Fermentation like Glucose, Lactose, Mannitol, Sorbitol, Arabinose, ONPG. You can also put Arginine and Lysin.

Biochemical properties of some microbes: : 1- Escherichia coli ; Oxydase (-),Nitrate(+), Glucose(+), Lactose(+), Indole(+) . 2- Enterobacteur ; Urease(-),Lipase(-),Gelatine(+),VP(+) .

a- Bacteria:

 Salmonella

Salmonellae are gram-negative bacilli, moving in all directions by flagella. They belong to the genus Enterobacteriaceae Salmonella. They cause two types of diseases: gastroenteritis by food poisoning (salmonellosis), and typhoid and paratyphoid fevers [1]. [1] -A. Brands., I. Alcamo., Salmonella., Chelsea House Publishers, Philadelphia, 2006.

 K.p

The bacterium Klebsiella, also called Friedländer bacterium, gram negative rod-shaped, non-mobile and usually encapsulated. Part of the intestinal flora and can be responsible for urinary and respiratory infections. It can only cause illness if the person is already vulnerable, weakened. The subcategory of Klebsiella pneumoniae is a bacterium that affects the respiratory tract, lungs, and can cause recurring diseases, such as angina, bronchitis, etc. [2]. [2] - P. R. Murray, E. J. Baron, J. H. Jorgensen, M. Landry L., Manual of Clinical Microbiology., 9th edition, ASM Press, Washington, 2007

 Staphylococcus

The bacteria of the genus Staphylococcus are gram-positive shells (cocci). The main ones are Staphyloccus aureus, S.epidermidis and S. saprophyticus. They are usually found on the skin or in the nostrils of people. In general, staphylococci do not cause infections in healthy people. Sometimes they can cause skin infections (eg, boils) or wound infections and, more rarely, pneumonias or blood infections [3]. [3] -A. Honeyman, H. Friedman, M. Bendinelli, Staphylococcus Aureus Infection and Disease, Kluwer Academic, New York, 2001.

opportunistic pathogens especially for debilitated individuals. Bacilli are also frequently involved in eye infections following accidental or surgical trauma [4]. [4] -W. Kluwer Microbiologie., 2nd edition, De Boeck, Brussels, 2002.

 Pseudomonas

The genus Pseudomonas is a Gram-negative aerobic mobile bacterium, 2 to 4 μm long, in the shape of swollen rods, with a polar flagellum that plays an important role in pathogenicity.

Pseudomonas aeruginosa is not very virulent in normal individuals and, on the contrary, highly pathogenic in subjects whose defenses are impaired. It is the prototype of opportunistic pathogenic bacteria [5,6,7]. [5] -M. Willcox., Pseudomonas aeruginosa infection and inflammation during contact lens wear., Optometry and Vision Science: Official Publication of the American Academy of Optometry, Vol. 84, pp. 273-278, 2007. [6] -N. Arora., R. Ramphal., FleN, a gene that regulates flagellar number in Pseudomonas aeruginosa., Journal of Bacteriology. Flight. 182, pp. 357-364, 2000. [7] -F. H. Kayser, K. A. Bienz, J. Eckert., Medical Microbiology, 10th Edition, Georg Thieme Verlag, Stuttgart, Germany, 2001.

 Escherichia coli

Escherichia coli, also known as E. coli or E. coli, is a very common intestinal bacterium in humans. In general, it is harmless and is part of our intestinal flora, but some strains of E. coli can lead to gastroenteritis (urinary tract infections). Some are pathogenic, they mainly cause infections of the digestive tract, the best known is the traveler's diarrhea, because of the contamination of water or food by the faecal flora of patients or carriers [8]. [8] -G.C. Ramos., Genotoxic effects of Escherichia coli strains producing Colibactin., Doctoral Thesis, University Toulouse III - Paul Sabatier, 2010.

 Morganella

Les souches du genre Morganella sont constituuées de bacilles de 0.6 to 1.0 μm de diamètre sur 1,0 à 3.0 μm de longueur. Morganella morganii et tout particulièrement les souches Morganella morganii subsp., Sont responsable d'infections opportunistes (Infections urinaires) [9]. [9] - P.R. Murray, E.J. Baron, M.A. Pfaller, F.C. Tenover., Manual of Clinical Microbiology, 7ème edition, ASM Press, Washington., 1999.

 Proteus

Les bactéries du genre Proteus sont des bacilles (en forme de bâtonnets). Elles font partie de la flore gastro-intestinale normale de l'humain135. Les espèces du genre Proteus sont fréquemment en cause dans les infections des voies urinaires (IVU) compliquées. Les bacilles sont habituellement observés dans les voies urinaires hautes (siège fréquent de l'infection) [10]. [10] - B. N. Kim, J. H. Woo., J. Ryu., Bacteraemia due to tribe Proteee: a review of 132 cases during a decade (1991-2000), Scandinavian Journal of Infectious Diseases. Vol. 35, pp. 98-103, 2003.  Stenotrophomonas

Bacille à Gram-négatif répandu dans l'environnement, opportuniste. Elle cause des infections nosocomiales variées et septicémies, souvent graves et difficiles à traiter en raison de la résistance multiple [11]. [11] -R. Amin1, V. Waters., Antibiotic treatment for Stenotrophomonas maltophilia in people with cystic fibrosis., John Wiley & Sons, Ltd, 2012.

Following answers.

Dr. Djaafar Zemali: What are your objectives, what is your research project in asking this very broad question and which, in my opinion, lacks precision, which did not allow researchers to interact with you?

Please have a look at these useful links.

Article Degradation of selected polycyclic aromatic hydrocarbons in ...

https://academic.oup.com/femsle/article-abstract/254/2/226/524468

Chapter Characterization of the diversity of ecologically important ...

Escherichia coli

Lactobacillus - A Gm +ve beneficial microbe resposible for the synthesis of Vit -B 12 in our cholon . For cholities / ameobiosys Lactobacillus therapy is a kind of PROBIOTIC MEDICINE .

https://www.researchgate.net/publication/335868820_INVISIBLE_UNIVERSE_OF_MICROBIOME_HUMAN_HEALTH_FUTURE_PERSPECTIVE_A_SEMINAR_PARTICIPATION?_sg=4YMaVHMMAvmEZNZPpgNsGQEZuPIFukEZUANHNNcTMx7pSO9fBpxuNTaNZa3KY473tQbO2OgbGqJWqvxHbFfOzX9Q8E5W0N7D-jVsGIjP.oDuIsAv-XlKdmFB57KTXya10iz79aVchHSVR-ru5MNzqQoHVdzSzzumGjK8rBjnp0ryh0RHOph4omAbxCsTUYg

Dear Djaafar Zemali, would you please make your question more specific and answerable?

Some microbes make us sick, others are important for our health. The most common types are bacteria, viruses and fungi. There are also microbes called protozoa. These are tiny living things that are responsible for diseases such as toxoplasmosis and malariaز