This research consisted to the assessment of the degree of pollution of the waters of the Kivu lake: case of the basin of Bukavu, being given the different affluents that himself pours there with all ways of garbages.
The objective of this last is to achieve a qualitative survey of the waters of the Kivu lake according to the ecological norms in the determination of the temperature, the pH, the alkalinity or the acidity, of the dissolved oxygen and of the biologic and chemical demand in oxygen on one hand; and on the other hand the comparison of the pollution degree in the different mentions retained: SNCC, BRALIMA, PHARMAKINA, BWINDI, KAZINGO and RUZIZI, the waters of large having served like witnesses.
After analysis of results, he/it cleared himself/itself what follows:
- The temperature of the waters of the Kivu lake is variable next one seasons with an average of 23°C;
- The waters of the lake are alkali and variable according to seasons;
- The dissolved oxygen is variable between 2,92 and 4,84mg/l, what is an admissible value for a better life in the aquatic middle because lower to 5mg/l.
He/it is therefore conclusive that the waters of the coastline of the Kivu lake in the basin of Bukavu are polluted in the decreasing order in sites of the following manner: SNCC, PHARMAKINA, KAZINGO, BRALIMA and BWINDI.

This work deals with the phytochemical screening of Entada abyssinica and that of Rhoïcissus erythroïdes it also deals with the activity test against Escherichia coli, Schigella flexneri and Salmonella polyvalento.
After a qualitative analysis, the activity test has been verified through the method of antibiogram discs.
By the end of this work, we noticed that:
- Entada abyssinica and Rhoïcissus erythroïdes present an affective antidiarrheic activity;
- Rhoïcissus erythroïdes has shown a positive affect against Shigella flexneri whereas Entada abyssinica has proven to be more affective against Salmonella polyvalento.
- The organic matters have manifested a better activity than aqueous matters.
- The minimal concentration inhibition has been risen up to 10-3. The more dilution rises up, the less the matters are effective.

Causes of mortalities observed in caviaculture are badly known even ignored by breeders in Sud-Kivu precisely in Walungu area. Thus, we contemplated to have a study in order to characterize ectoparasitosis in this breeding by emphasizing on their symptoms, the identification cutanous scratching and harvest of crust and hair of guinea-pig submitted on the laboratory analysis, suggesting some recommendation especial hygienic adapted to the small breeders in the peasant area by taking into account a test of heal with palmist oil associated with kerosene. All that in order to manage the risks of infestations which can harmer even human beings, because these sicknesses are wellknown as zoonoses.
Our study was applieds in this center of Walungu area where we have first isolated the sick guinea-pig on which we took away cutanous scratching product and hair on animal met and having symptoms of scabies wiich guinea-pigs constitute the fist pattern. The second lot constitutes the hair harvested on guinea-pigs in the pilot farm, in order to characterize ectoparasites by identifying in laboratory where we have put our emphasis of ectoparasits Sarcoptes scabei and Demodex sp type but as well their frequency which vary according to different farm, ages and sex.
Notice that the breeding system which remains traditional is at the origin of dissemination of these ectopasasits mainly if some hygienic rules are not respected. They are the purchasing in the market or in the farms infested, the donation followed by sudden introduction of guinea-pigs in inhurt breeding without quarantine at fist and lack of heal application of these parasits which attack human being. The sanitary care taken for in a mix of 70% of oil and 30% of kerosene renew heath of beasts.

A retrospective study on the reasons of seizures of organs of animals done at the public slaughterhouse of Blessed has been led on one period of five years since 2007 till 2011.
To shortcoming an analysis of its results we look for results to seizures meats characteristics whose energetic value should have suved the cellular metabolism, it has been noted a number very important of carcasses on which have been achieved of the partial seizures. A total of 3077 cases that corresponded to 2835,75 kg of meat seizure have been observed during the study; cattle covered the biggest proportions. The losses in animal proteins were therefore real.
Being about the spoil types, fifteen motives constituted the reason of seizure of one or the other of the organs on the whole in the species bovine, ovine, caprine and porcine.
The bad bled, the distomatose, the pulmonary emphysema, the cysticercose, the caseification, the abscesses, the adhesions, the dotted liver, the tuberculose, the blow up spleen, the angiocholite, the kidney stones, the hydronephrose, the metastrongylose and the verminous nodules.
Among the four studied species, the bovine was the most interesting for which one noted 2197 cases, either 71,4%, in case of pig, 722 cases (23,46%).
Among the small ruminants, the goat covered 3,37% and sheep only achieved 1,75%.
According spoil frequencies, there are no differences statically.
Considering the category of meats seized, it is useful to signal that most came from the red viscera.
In a general manner, the yearly averages were respectively of 29,4cas and 47,5Kg, numbers that are spectacular enough on time where the needs in meat are increasing.