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Some Properties Of Purified And Non-Purified Rumen Tissue Arginase In Cattle, Mi̇ne Eri̇şi̇r, Sema Temi̇zer Ozan
Some Properties Of Purified And Non-Purified Rumen Tissue Arginase In Cattle, Mi̇ne Eri̇şi̇r, Sema Temi̇zer Ozan
Turkish Journal of Veterinary & Animal Sciences
Some biochemical properties of purified and non-purified rumen tissue arginase were compared. Homogenization, heating, treatment with aceton, precipitation with ammonium sulfate, dialysis, several centrifugations, gel filtration on sephadex G-200 processes were utilized in the purification procedure of the enzyme. It was found that pre-incubation temperature (60 °C) of arginase and Km (4mM) to its substrate, L-arginine, did not change before and after purification. While pre-incubation period was 10 min and optimal pH 9.7 before purification, pre-incubation period was found to be 5 min and optimal pH 10 after purification. Purified enzyme achieved its highest activity at 2 mM MnCl_2 concentration, …
Determination Of Pregnancy, Embryonic-Fetal Mortality, Ovarium Functions And Uterus Diameter In Cows By Ultrasonography, Seli̇m Aslan, German Wesenauer
Determination Of Pregnancy, Embryonic-Fetal Mortality, Ovarium Functions And Uterus Diameter In Cows By Ultrasonography, Seli̇m Aslan, German Wesenauer
Turkish Journal of Veterinary & Animal Sciences
In this study 57 cows at the puerperal stage (between 15-45 days) and at early pregnancy period (between 8-58 days) were subjected to clinical and Ultrasonography check at 10-day intervals. On the 8 th day of post insemination (p.ins.) areas of nidation ranging from 0,5-1,5 cm were established by means of US (n=53) and on 40 animals (70,2%) the development of these areas were followed until the 58th day of pregnancy. In the other 13 cows (22,8%), begining from early embriyonic featal deaths (18) days and late embriyonic featal deaths (28 days) were established ultrasonographycally. 4 animals (7,0%) that no …
The Effect Of Water Current On Nutrient Components Of Rainbow Trout (Oncorhynchus Mykiss), Mehmet Çeli̇k, Mahmut Yanar
The Effect Of Water Current On Nutrient Components Of Rainbow Trout (Oncorhynchus Mykiss), Mehmet Çeli̇k, Mahmut Yanar
Turkish Journal of Veterinary & Animal Sciences
In this study, the effects of water current on nutrient components of trout (Oncorhynchus mykiss) were investigated. One year old fish averaging 550±0.06 g were used in the experiment which lasted for 3 months. In the experiment, the fish were reared in two tank of 1800 l each in the first tank (group A), water current was 1.5-2 fish length (25 cm)/sn while in the second tank (group B) there was no water current. In group A while the fillets contained 68.89±1.47 % dry matter, 19.71±0.66 % protein, 9.91±1.81 % lipit, the fillet of group B had 69.32±1.15 % dry …
Comparision Of Some Physiological Characters Of Caucasian, Central Anatolian And Erzurum Honeybee (Apis Mellifera L.) Genotypes In The Conditions Of Erzurum, Ferat Genç, Cemal Dülger, Ahmet Dodoloğlu, Semi̇rami̇s Kutluca
Comparision Of Some Physiological Characters Of Caucasian, Central Anatolian And Erzurum Honeybee (Apis Mellifera L.) Genotypes In The Conditions Of Erzurum, Ferat Genç, Cemal Dülger, Ahmet Dodoloğlu, Semi̇rami̇s Kutluca
Turkish Journal of Veterinary & Animal Sciences
The various physiological characters of Caucasian, C. Anatolian and Erzurum honeybee (A. mellifera L.) genotypes in the conditions of Erzurum were examined in this study. The survival rates of genotypes for the wintering and production periods were found to be 81.82 % and 70.00 %, 90.00 % and 77.78 %, 100.00 % and 90.00% respectively. During the wintering period, 18.18 % and 10.00 % of colonies in Caucasian and C. Anatolian groups respectively died; but no colony from the Erzurum group was lost. During the wintering period, the average food consumption of Caucasian, C. Anatolian and Erzurum groups was calculated …
Comparison Of Some Behavioural Characteristics Of Caucasian, Central Anatolian And Erzurum Honeybee (Apis Mellifera L.) Genotypes In The Conditions Of Erzurum, Ferat Genç, Cemal Dülger, Semi̇rami̇s Kutluca, Ahmet Dodoloğlu
Comparison Of Some Behavioural Characteristics Of Caucasian, Central Anatolian And Erzurum Honeybee (Apis Mellifera L.) Genotypes In The Conditions Of Erzurum, Ferat Genç, Cemal Dülger, Semi̇rami̇s Kutluca, Ahmet Dodoloğlu
Turkish Journal of Veterinary & Animal Sciences
The various behavioural characteristics of Caucasian, C. Anatolian and Erzurum honeybee (Apis mellifera L.) genotypes in the conditions of Erzurum were examined in this study. A total of 30 colonies were used in the experiment; 10 colonies of each genotype. Stinging tendencies differed between the groups (P
A Study On The Decrease Lambing Interval Of Karacabey Merino Sheep Under Semi-Intensive Conditions, E. Seval Batmaz, Hasan Başpinar
A Study On The Decrease Lambing Interval Of Karacabey Merino Sheep Under Semi-Intensive Conditions, E. Seval Batmaz, Hasan Başpinar
Turkish Journal of Veterinary & Animal Sciences
In this study, it is aimed to decrease lambing interval of Karacabey Merino sheep. For this reason,in June and March, sheep were mated in the interval of 8 month. Fertility traits such as oestrus, pregnancy, parturition, lambing rate and that of twinning and litter size were 99.35, 90.25, 88.96, 1327.01, 52.55 % and 1.54 respectively in June. The values of same fertility traits were 95.17, 82.75, 78.62, 105.51, 34.21 % and 1.34 respectively in March. The body weight before mating for the sheep was found 68.03 kg in June and 61.68 kg in March. The lambing interval for the sheep …
Determination Of Kinetic, Structural And Functional Changes In The Hearts Of Dogs With Experimentally Introduced Myocardial Infarction Using M-Mode And 2-D Echocardiography, Utku Bakirel, Tarik Bi̇lal
Determination Of Kinetic, Structural And Functional Changes In The Hearts Of Dogs With Experimentally Introduced Myocardial Infarction Using M-Mode And 2-D Echocardiography, Utku Bakirel, Tarik Bi̇lal
Turkish Journal of Veterinary & Animal Sciences
In this study, the kinetic, structural and functional changes of the ventriculus in dogs with myocardial infarction introduced experimentally were examined using M-Mode and two dimensional (2-D) echocardiography. 21 healthy, mixed-breed dogs of both genders (16 females and 5 males) and of various ages were used in this study. Different coronary arteries were ligated in each dog with silk sutures and the dogs were grouped accordingly: left distalis descending coronary artery (Group I, n=7), right distalis descending coronary artery (Group II, n=7) and both left and right distalis decending coronary artery (Group III, n=7). All the dogs were examined using …
Membraneous And Myelinated Bodies In Neural Complex Cells Of Ciona Intestinalis (Tunicata, Ascidiacea), Ayla Öber
Turkish Journal of Veterinary & Animal Sciences
A study was conducted on the existence, structure and localization of membraneous and myelinated bodies which appear within the cerebral ganglion and neural gland, which are the components of the neural complex of Ciona intestinalis (Tunicata, Ascidiacea). According to the literature, these structures occur within the cytoplasm of a normal cell, but it was observed that they increase in number and show exhibit greater morphological intricacy in connection with certain physiological events.
The Effect Of Various Weighing Procedurs On Broiler Performance Evaluation, Recep Kahraman, Müjdat Alp, Neşe Kocabağli, Gülcan Irmak
The Effect Of Various Weighing Procedurs On Broiler Performance Evaluation, Recep Kahraman, Müjdat Alp, Neşe Kocabağli, Gülcan Irmak
Turkish Journal of Veterinary & Animal Sciences
This study was caried out to determine the effects of weighing, after 0 or 18 hours of starvation period of chicks and at intervals of 1 or 2 week or at the end of starter and finisher period on the live weight and feed convertion rate of broilers. In conclusion, weighing at intervals 2 weeks of broilers which fed continously to the slaughter resulted the greatest live weight and also feed convertion rate.
The Effects Of Cyclophosphamide In The Absence And Precence Of Mesna On Some Blood Parameters In Guinea Pigs, Özdal Etli̇k, İlksi̇n Pi̇şki̇n, Vedat Sağmanligi̇l, Ahmet Tomur
The Effects Of Cyclophosphamide In The Absence And Precence Of Mesna On Some Blood Parameters In Guinea Pigs, Özdal Etli̇k, İlksi̇n Pi̇şki̇n, Vedat Sağmanligi̇l, Ahmet Tomur
Turkish Journal of Veterinary & Animal Sciences
This investigation was carried out to observe the effects of single dose of cyclophosphamide on blood cells and whether these could be prevented by mesna or not. In this study, 24 albino male guinea pigs weighing 250-300 g were equally diveded into 4 groups. The first (control) and second groups animals were applied physiologic saline as placebo while third and fourth group animals were given mesna (21.5 mg/kg) at 0, 180, 360 and 540^{th} minutes intraperitoneally. In addition these, physiologic saline was injected to the first and third group animals while cyclophosphamide (68,1 mg/kg) was given to the second and …
A Research On The Growth Rate On The Mullet (Mugil Auratus Risso, 1810) Fingerlings Fed Different Diets In Cages, Gülçi̇n Ağirağaç, Mustafa Kalma
A Research On The Growth Rate On The Mullet (Mugil Auratus Risso, 1810) Fingerlings Fed Different Diets In Cages, Gülçi̇n Ağirağaç, Mustafa Kalma
Turkish Journal of Veterinary & Animal Sciences
This research was conducted to determine the effect of different feeds on the growth rate of mullet juveniles (M. auratus R. 1810). Juveniles with a initial mean weight of 14.15 g and 14.71 g were feed a semi-moist diet (%50 trout viscera + %25 soybean meal + %25 high quality wheat bran) and carp pellets for a period of 60 days in marine cages. At the end of the experiment, final average weights were determined as 28.83± 0.6 g and 22.04±0.6 g have been obtained, respectively. The difference between the two harvesting weights was found statistically significant (P
The Effects Of Danofloxacin On Some Biochemical Parameters And Liver In Broilers, Fatma Uyanik, Bi̇lal Cem Li̇man, Nari̇n Li̇man
The Effects Of Danofloxacin On Some Biochemical Parameters And Liver In Broilers, Fatma Uyanik, Bi̇lal Cem Li̇man, Nari̇n Li̇man
Turkish Journal of Veterinary & Animal Sciences
In this study, a total of 160 one day old broiler chicks were devided into two groups consisting of 60 chicks in control group and 100 chicks in treatment group. The birds in treatment group received 50 ppm, 25 ppm, 37.5 ppm and 50 ppm danofloxacin via drinking water between the days during 0-7, 8-21, 22-35 and 36-42 respectively. Live weight, liver weight, serum total protein, albumin, globulin, copper, zinc and magnesium levels as well as \gamma-GT, GOT and GPT activities of 15 birds from control group and 25 birds from treatment group were determined on days 15, 21, 35 …
Experimental Salmonellosis Caused By Salmonella Enteritidis Phage Types 1, 4 And 7 In Quails (Coturnix Coturnix Japonica), Gülçi̇n Öztürk, Fethi̇ Yilmaz, Hakan Kalender
Experimental Salmonellosis Caused By Salmonella Enteritidis Phage Types 1, 4 And 7 In Quails (Coturnix Coturnix Japonica), Gülçi̇n Öztürk, Fethi̇ Yilmaz, Hakan Kalender
Turkish Journal of Veterinary & Animal Sciences
In this study, S.enteritidis PT1, 4 and 7 strains isolated from chickens were used. Suspensions containing 10^9 bacteria were inoculated orally to 45 quails. Pathological lesions were examined and bacterial isolation were performed during about 30 days. In 3^{rd} days of experiment, one quail died in PT1 group. In macroscopic examinations, hyperemia and change of colour in liver and slight enlargement in spleen were observed. In microscopic examinations, degeneration, necrose and typhoid nodes were seen in liver. There were reticular cell hyperplasia in spleen and epithelial degeneration , lenfoid hyperplasia in intestines. Bacteria was able to isolated from intestines, liver …
Comparison Of Carbohydrate Compositions Of Total Apolipoproteins In Lipoproteins, Tayfun Güldür, Sema Ozan, Tülay İleri̇ Büyükoğlu
Comparison Of Carbohydrate Compositions Of Total Apolipoproteins In Lipoproteins, Tayfun Güldür, Sema Ozan, Tülay İleri̇ Büyükoğlu
Turkish Journal of Veterinary & Animal Sciences
Terminal carbohydrate moieties of apolipoproteins of lipoproteins in human and goat serum were ascertained and compared. Apolipoproteins of \beta+pre-\beta (apolipoprotein B containing lipoproteins) and a lipoproteins separated by phosphotungstic acid/MgCl_2 precipitation method were applied to SDS-PAGE and blotted onto nitrocellulose membrane. Digoxigenin labelled lectins, each of which recognizes a specific sugar sequence, were incubated with apolipoproteins immobilized on a western blot membrane to probe some of carbohydrate structures commonly found in carbohydrate chains of glycoproteins.The presence of bound lectin on the membrane was detected with alkaline phosphatase labelled antidigoxigenin antibody.Sialic acid terminally linked \alpha (2--3) to galactose was detected on …
Inhibition Of Listeria Monocytogenes By Nisin During Manufacture Of White Pickled Cheese, Ela Aktürkoğlu, İrfan Erol
Inhibition Of Listeria Monocytogenes By Nisin During Manufacture Of White Pickled Cheese, Ela Aktürkoğlu, İrfan Erol
Turkish Journal of Veterinary & Animal Sciences
This study based on the effect of nisin on Listeria monocytogenes in white pickled cheese made from pasterurized milk during the ripening and storage period for 60 days. For this purpose, four groups of cheese were produced. All groups were inoculated with the L. monocytogenes 1/2a test strain at the levels of 10^4-10^5 cfu/ml. Group I was remained as a control group (contained no starter culture and nisin). Group II was added a mixture culture of the commercial starter culture Lactococcus lactis and Lactococcus cremoris in a proportion of 2 % , while in group III was added the same …
Effect Of Bacteriocinogenic Starter Cultures On The Growth Of Listeria Monocytogenes In Turkish Fermented Sausage (Sucuk), İrfan Erol, T. Haluk Çeli̇k, Ufuk Tansel Şi̇reli̇, Haydar Özdemi̇r
Effect Of Bacteriocinogenic Starter Cultures On The Growth Of Listeria Monocytogenes In Turkish Fermented Sausage (Sucuk), İrfan Erol, T. Haluk Çeli̇k, Ufuk Tansel Şi̇reli̇, Haydar Özdemi̇r
Turkish Journal of Veterinary & Animal Sciences
The objective of this study was the inhibition of L. monocytogenes (SLCC 9488) serotype 4b, indicated great importance in foodborne listeriosis, by using bacteriocin producer starter cultures as Pediococcus acidilactici PAC 1.0 and Lactobacillus sake Lb 706 in fermented Turkish sausage (sucuk), ripened at 20° and 25°C. For this purpose, 4 groups were constituted in each experimental sucuk producing as following. All of these groups were inoculated with L. monocytogenes at the range of 7.0 - 2.9x10^5 cfu/g, and the other groups except control group following starter cultures were added. 1.Group : Included only L. monocytogenes at the range of …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
The Anti-Inflammatory Effects Of N^G-Nitrol-Arginine (L-Name) And Steroid In Concanavalina-Induced Uveitis, Hamdi̇ Er, Erhan Üzmez, Naki̇ Doğan, Tongabay Cumhurcu
The Anti-Inflammatory Effects Of N^G-Nitrol-Arginine (L-Name) And Steroid In Concanavalina-Induced Uveitis, Hamdi̇ Er, Erhan Üzmez, Naki̇ Doğan, Tongabay Cumhurcu
Turkish Journal of Medical Sciences
The objective of this study was to compare the anti-inflammatory effects of NG -nitro L-arginine (L-NAME) and corticosteroid in Concanavalin A-induced uveitis in rats. Sixteen male Wistar rats were used. After general anesthesia, intravitreal 0.1 ml Concanavalin A (100mg/ml) was injected into the left eyes of the rats. The animals were divided into 3 groups: group 1 (6 animals) received intraperitoneal 0.2 ml L-NAME (200 mg/kg) 1 hour before, 1 day and 3 days after Concanavalin A injection, group 2 (6 animals) received tropical 1% prednisolone acetate four times a day for 3 weeks, group 3 (4 animals) received an …
Chromosomal Aberrations In Peripherallymphocytes Of A High-Voltage Power Linemanexposed To Electromagnetic Fields, M. Emi̇n Erdal, Nurten Erdal, Si̇bel Oğuzkan
Chromosomal Aberrations In Peripherallymphocytes Of A High-Voltage Power Linemanexposed To Electromagnetic Fields, M. Emi̇n Erdal, Nurten Erdal, Si̇bel Oğuzkan
Turkish Journal of Medical Sciences
No abstract provided.
The Protective Effect Of Vitaminse And C On The Gastric Mucosal Barrier In Ratsirradiated With X-Rays, Ci̇hat Güzel, Cemi̇l Sert, Zeki̇ Kanay, Doğan Kurt
The Protective Effect Of Vitaminse And C On The Gastric Mucosal Barrier In Ratsirradiated With X-Rays, Ci̇hat Güzel, Cemi̇l Sert, Zeki̇ Kanay, Doğan Kurt
Turkish Journal of Medical Sciences
The protective effect of vitamins E and C on the gastric mucosal barrier in rats irradiated with X-rays was investigated. Thirty-two male Wistar Albino rats were used. The animals were divided into four groups and arranged of follows: the first group (n=8) was the sham group; the second group (n=8) was the control group which was irradiated with X-rays, the third group (n=8) to which vitamin C was administered and the fourth group (n=8) to which vitamin E was given. The animals in the groups except the sham group wereirradiated with 8.9 Gy X-rays. Twenty-four hours later, the animals were …
Bilateral Carpal Hyperextension Cases In Dogs And Operative Treatment Methods, Burhanettin Olcay, Mehmet Sağlam, Hasan Bi̇lgi̇li̇
Bilateral Carpal Hyperextension Cases In Dogs And Operative Treatment Methods, Burhanettin Olcay, Mehmet Sağlam, Hasan Bi̇lgi̇li̇
Turkish Journal of Veterinary & Animal Sciences
This study was carried out on 4 dogs with bilateral carpal hyperextension that treated in Ankara University, Faculty of Veterinary Medicine Orthopaedics and Traumatology Clinic. In clinical examination, it was found that the angle of the stepped carpal joints were between 250° and 270°. Furthermore, there were wounds at volar sites of carpal joints. There were no lesions seen radiographically. In 3 cases, total arthrodesis was made by applying a single Steinmann pine, passing intramedullary through metacarpus III, to os carpi centrale and radius, in one case total arthrodesis was made by applying three Steinmann pines passing through metacarpus 2, …
The Effects Of Some Natural And Synthetic Pigment Materials On Egg Yolk Pigmentation Andproduction In White Corn And Wheat Based Diets, Figen Kirkpinar, Ramazan Erkek
The Effects Of Some Natural And Synthetic Pigment Materials On Egg Yolk Pigmentation Andproduction In White Corn And Wheat Based Diets, Figen Kirkpinar, Ramazan Erkek
Turkish Journal of Veterinary & Animal Sciences
The study was carried out to investigate the effect of adding lutein, alfalfa meal, marigold meal, paprika meal, ?-apo-8'-carotenoic acid ethyl ester, canthaxanthin and ?-apo-8'-carotenoic acid ethyl ester+canthaxanthin (3:1) on egg yolk pigmentation and production in white corn and wheat diets. The maximum Roche color fan (RCF) value was found in canthaxanthin and the mixture of ?-apo-8'-carotenoic acid ethyl ester and canthaxantin. The maximum ?-carotene equivalent (BCE) value was found in ?-apo-8'-carotenoic acid ethyl ester. The maximum Hunter L value was found in the control and lutein. The maximum Hunter a value was found in paprika meal. The maximum Hunter …
Pulmonary Aspergillosis In Geese, S. Serap Türkütanit
Pulmonary Aspergillosis In Geese, S. Serap Türkütanit
Turkish Journal of Veterinary & Animal Sciences
Pulmonary aspergillosis were examinated in a total of 22 geese (2-13 week-old), brought from A Geese Production Station in Kars and geese breeders. The lesions were seen as a hard nodules in all cases in the lungs, and also in 3 cases in the air sacs. They were multifocalty localized in each lobules, and 1-4 mm. in diameter and yellow in color. The lesions were characterized by granulomatous pneumonie and airsacculitis. The characteristic hyphae of Aspergillus spp. were demonstrated in granuloma in histopathological sections stained by periodic acid Schiff stain.
Effect Of Gonadoreline Administration On Blood Progesterone, Oestradiol 17\Beta Concentrationand Some Fertility Parameters In Angora Goats, Erol Alaçam, Bülent Güven, Ali Ayar, Erdal Saban
Effect Of Gonadoreline Administration On Blood Progesterone, Oestradiol 17\Beta Concentrationand Some Fertility Parameters In Angora Goats, Erol Alaçam, Bülent Güven, Ali Ayar, Erdal Saban
Turkish Journal of Veterinary & Animal Sciences
Various fertility parameters, plasma progesterone and oestradiol 17\beta ?concentrations were investigated in Angora Goats receiving gonadoreline immediately or on 12th day after breeding . A total 48 cyclic , pluriparous Angora Goats, 2-5 years of age were divided into 3 groups. The first group received 100 µg gonadorelin immediately after breeding. The second group received 100 µg gonadoreline on the 12th day after breeding and the third group receiving no injection served as the control. Jugular blood samples were collected from all goats during the days 13 to 16 after breeding and plasma progesterone and oestradiol 17\beta?levels were determined by …
Cover And Contents
Turkish Journal of Veterinary & Animal Sciences
No abstract provided.
Efficacy Of Moxidectin Against Gastrointestinal Nematodesin Naturally Infected Lambs And Calves, Erkut Tüzer, Müfi̇t Toparlak, Kazim Göksu
Efficacy Of Moxidectin Against Gastrointestinal Nematodesin Naturally Infected Lambs And Calves, Erkut Tüzer, Müfi̇t Toparlak, Kazim Göksu
Turkish Journal of Veterinary & Animal Sciences
In this trial based on the reduction of the egg output and on the evaluation of results from larval/egg differentiation, moxidectin (Cydectin, 1% injectable moxidectin) administrated subcutaneously at a dose of 0.2 mg kgbw -1 was found effective on the gastrointestinal nematodes in naturally infected lambs (8 female and 7 male treatment; 8 female and 7 male control) harbored Haemonchus spp, Ostertagia spp, Trichostrongylus spp and Nematodirus spp and in naturally infected female calves (20 treatment and 10 control) harbored Haemonchus spp, Ostertagia spp, Trichostrongylus spp, Bunostomum sppand Cooperia spp.The efficacy was 100% on day +7, 99.9% on day +14 …
The Effect Of Chromium Added Into Basal Diet On Serum Total Protein, Urea,Triglyceride, Cholesterol And Serum And Tissue Chromium, Zinc, Copperlevels In Rabbits, Kazim Şahi̇n, Talat Güler, Nurhan Şahi̇n, O. Ni̇hat Ertaş, Necla Erkal
The Effect Of Chromium Added Into Basal Diet On Serum Total Protein, Urea,Triglyceride, Cholesterol And Serum And Tissue Chromium, Zinc, Copperlevels In Rabbits, Kazim Şahi̇n, Talat Güler, Nurhan Şahi̇n, O. Ni̇hat Ertaş, Necla Erkal
Turkish Journal of Veterinary & Animal Sciences
This study was conducted to determine the effect of supplemantal dietary chromium on serum total protein, urea, triglycerides, cholesterol, and serum and tissue chromium, zinc, and copper contents of pregnant rabbits, their offspring and their young rabbits. Treatment groups consisted of chromium level as follows: Control Group no supplementation chromium into basal diet, Treatment I (200 ppb Group) contained 200 ppb of supplemental chromium into basal diet, and Treatment II (400 ppb Group) contained 400 ppb of supplemental chromium into the basal diet which contained 539.17 ppb chromium. For this purpose, at the begining of the study, 36 rabbits were …
The Ultrastructure Of The Parasite And The Mucus Cellrelationship And Endogenous Stages Of Cryptosporidium Murisin The Stomach Of Laboratory Mice, Yilmaz Aydin
Turkish Journal of Veterinary & Animal Sciences
The ultrastructure of endogenous stages of Cryptosporidium muris in the stomach of laboratory mice was studied by transmission electron microscopy. Electron microscopy showed the various developmental stages as free in the gastric gland lumina and attached to the mucus cells. The changes in organelle composition and structure of various stages from the sporozoite to young trophozoites and matured oocysts were demonstrated in detail. Two types of the meront were discriminated. The finding of a microgamete on the parasitophorous vacuolar membrane surrounded a macrogamont was interesting for the stage of fertilization in C. muris. Types 1 and 2 wall-forming bodies were …