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1
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Dziedziczny charakter zmiennosci cech u Hymenolepis diminuta wyhodowanych z onkosfer okreslonego pochodzenia

100%
Stradowski M.
Wiadomości Parazytologiczne
|
1996
|
tom 42
|
nr 1
95-101
2
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Intensified morphological variability during patency in Hymenolepis diminuta originating from inbred tapeworm - WMS IL1

100%
Stradowski M.
Wiadomości Parazytologiczne
|
1995
|
tom 41
|
nr 1
33-41
Variable position of genital ducts and pores (PGP) was found in 23.3% of five months old tapeworms obtained as a result of administering to rats a dose of 6 cysticercoids proceeding from the third generation of inbred Hymenolepis diminuta - WMS il1. In tapeworms coming from generations no 18 and 32 PGP changes were reported only in 7.5 month, with only 5.9% of strobilas in the 32 generation group being characterized by this feature. These results indicate a time shift with respect to the appearance of PGP changes in tapeworms proceeding from latter inbred generations to a further period of tapeworm invasion in rats. The number of PGP changes is positively correlated with the number of type 2p1a proglottids (two testes on the poral and one on the aporal side). The average number of type Op3a proglottids increases with the number of generations. In 5-month old tapeworms of unilateral PGP coming from generation no 3, 18 and 32 it amounts to 5.9%, 6.6% and 8.1 %, respectively.
3
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Stymulacja zmian morfologicznych u tasiemcow pochodzacych z odleglych od wyjsciowego pokolen hodowli wsobnej Hymenolepis diminuta - WMS IL1

100%
Stradowski M.
Wiadomości Parazytologiczne
|
1995
|
tom 41
|
nr 4
399-404
The investigations focused on tapeworms obtained as a result of the administration to individual rats a dose of 6 cysticercoids coming from the 39th and 40th generation of one-specimen inbred Hymenolepis diminuta - WMS il1. In 7.5-month old tapeworms the position of genital pores (PGP) was exclusively right-hand side with the genital ducts typical of this feature. Type 0p3a proglottids were the most common deviation from the typical number and topography of testes - 1p2a (one testis between the ovary and the genital pore marking the poral side and two testes on the aporal side) - in such tapeworms. Their mean incidence amounted to 8.9%, exceeding by at least 2.9% the mean quantitative value of this feature in tapeworms proceeding from non-inbred H. diminuta „strains" which have been subjected to similar studies. 19.5-month old tapeworms, exactly a year older than the previous ones, all had variable PGP. The number of PGP changes was here correlated positively with the number of type 2p1a proglottids and negatively with the number of type 1p2a and 0p3a proglottids.
4

Correlations between testes' position and genital pore placement in Hymenolepis diminuta

100%
Stradowski M.
Acta Parasitologica Polonica
|
1989
|
tom 34
|
nr 2
5
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Wplyw doboru tasiemcow macierzystych linii wsobnej Hymenolepis diminuta WMS IL1 na zmiennosc cech u tasiemcow potomnych

100%
Stradowski M.
Wiadomości Parazytologiczne
|
2002
|
tom 48
|
nr 1
79-85
A continuation of a single-individual culture of Hymenolepis diminuta WMS ill from generations 37 to 66 revealed a very high infective ability of cysticercoids which is reflected in the percentage of tapeworms detected in relation to the number of cysticercoids given to rats (94.4%). The tapeworms investigated revealed a significant increase in the abundance of type 0p3a proglottids (those wilh no testes on the poral side and 3 on the aporal) in tapeworms of successive generation groups. Each group of tapeworms analysed statistically belonged to three successive generations and numbered 31-34 individuals. The mean abundances of 0p3a type proglottids in tapeworms of the first groups studied in experiment, including generations 37-39 and 40-42 were 9.2% and 9.5%, respectively. The last studied groups, including generations 61-63 and 64-66 had higher mean numbers of type 0p3a proglottids, at 11.1 % and 11.5%, respectively. The quantitative figures of 1p3a type proglottids amounted to 1.6% and 1.3% in first generation groups and in the last two groups 0.8% and 1.0%, respectively. The probable cause of this significant (P < 0.01) relative increase in the numbers of 0p3a type proglottids and decrease (P < 0.01) in the numbers of 1p3a type proglottids was the deliberate selection of maternal tapeworms characterized by numbers of 0p3a type proglottids greater and 1p3a type proglottids smaller than the a verage for their generation.
6
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Struktura infrapopulacji maloliczebnych i zageszczonych tasiemca Hymenolepis diminuta linii wsobnej -WMS IL1

100%
Stradowski M.
Wiadomości Parazytologiczne
|
2001
|
tom 47
|
nr 1
127-135
An average of 4.9 tapeworms were discovered on day 7 of a low-abundance H. diminuta infection of rats of race WAG alb. After 11 months, the mean was only relatively slightly tower at 3.6. These means represent 97.1 and 71.4% of the 5 cysticercoids supplied. In turn, 7 days and 11 months after rats were supplied with 110 cysticercoids, the respective percentages were 85.1 and 56.0. All 7- and 12-day tapeworms from the low-abundance and crowded infrapopulations were characterized by the presence of a terminal proglottid of lingulate shape, in which the excretory canals joined. In contrast, older (48-day and 11-month-old) worms showed typical apolysis of gravid proglottids. There were no reports of the destrobilation of tapeworms, and the relatively large number of tapeworms persisting 11 months into the infection is particularly noteworthy. The results point to the lack of any rapid rejection of tapeworms of the kind characterized in many other studies on H. diminuta.
7
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Wplyw stloczenia tasiemcow Hymenolepis diminuta na budowe proglotydow w okresie ich wzmozonej zmiennosci

100%
Stradowski M.
Wiadomości Parazytologiczne
|
1996
|
tom 42
|
nr 2
185-195
8
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Porownanie zmiennosci tasiemcow uzyskanych w wyniku zarazenia szczurow larwami Hymenolepis dimunuta w roznym wieku

100%
Stradowski M.
Wiadomości Parazytologiczne
|
1995
|
tom 41
|
nr 2
211-216
In Hymenolepis diminuta WMS "strain" tapeworms which were obtained 25 months after the administration to rats of 2-month old larvae - cysticercoids, isolated from Tribolium destructor, only one-sided position of genital pores (PGP) developed. The extended 7-month duration of the invasion of H. diminuta larvae stimulates the development of variable PGP already in 14.1 % of 2.5-month tapeworms. In tapeworms with exclusively one-sided PGP in the first of the two groups mentioned, the number of type 1p2a proglottids (1 testis on the poral side and 2 testes on the aporal side) as well as type 0p3a, 1p3a and 2p1a amounted to 88.2%, 5.5%, 4.2% and 0.5%, respectively and similary in the second group - 88.3%, 5.6%, 4.5% and 0.6%, respectively. In tapeworms with variable PGP the mean number of the types of proglottids mentioned was diflerent Crom (86.0%, 4.1 %, 3.8% and 4.1%, respectively) the same figure in tapeworms with one-sided PGP. Particularly high correlation was found to occur between the number of PGP variations and type 2p1a proglottids (r= +0.928, P<0.01).
9

Evidence of a crowding effect on the morphology of Hymenolepis diminuta proceeding from WMS inbred line 1

100%
Stradowski M.
Acta Parasitologica
|
1994
|
tom 39
|
nr 4
10
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Tapeworms morphological changeability in the chain of Hymenolepis diminuta WMS strain generations

100%
Stradowski M.
Wiadomości Parazytologiczne
|
1997
|
tom 43
|
nr 1
The investigations covered 54 subsequent generations of Hymenotepis diminuta WMS „strain" obtained through the administration of 6 cysticercoids of tapeworm to Wistar strain rats and WAG alb. rats. The number of tapeworms at 2.5 months after the infection of rats ranged from 3 to 6, on the average 5.2. Taking into consideration the most important type 1p2a (one testis on the poral side and two testes on the aporal side), 0p3a, 1p3a and 2p1a proglottids a significant differences was found in the distribution of the numerousity of type 1p3a proglottids (P<0.05). This indicates a possibility of an unguided change of the numerousity of proglottids of this type in a period covering 54 subsequent H. diminuta generations bred in laboratory conditions.
11

Effects of inbreeding in Hymenolepis diminuta [ Cestoda ]

100%
Stradowski M.
Acta Parasitologica
|
1994
|
tom 39
|
nr 3
12

Influence of crowding of Hymenolepis diminuta [WMS il1] on structure of strobila

100%
Stradowski M.
Acta Parasitologica
|
1998
|
tom 43
|
nr 1
On average, hermaphroditic proglottids of 10- month-old Hymenolepis diminuta proceeding from WMS il1 contained more testes when tapeworms were cultured in crowded populations (44-48 individuals) than in lower density (4-6 individuals). Furthermore, one average-sized testis from a tapeworm of the crowded population accounted for a relatively greater part of proglottid volume than did one in tapeworms from the low-density populations. These same populations - both low-density and crowded - included tapeworms with unilateral positioning of genital ducts and pores, or with changes in the positioning of these organs in strobilae. This variability is correlated positively with the number of proglottids of type 2p1a (containing two testes on the poral side and one on the aporal), and negatively with the numbers of types 1p2a, 0p3a and 1p3a (P<0.01).
13
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Comparison of Hymenolepis diminuta WMS strain and WMS inbred line [IL1] at a time of intensified morphological variability of tapeworms

100%
Stradowski M.
Wiadomości Parazytologiczne
|
1998
|
tom 44
|
nr 4
9-months tapeworms obtained from 3- 6-specimen populations of the 42nd generation of Hymenolepis diminuta WMS „strain" were compared with tapeworms obtained from quantitatively similar populations deriving from one-specimen infections of H. diminuta WMS il1. In both groups of tapeworms the majority of strobilas had unilateral position of genital pares (PGP), while the remaining ones were characterized by variable PGP. The latter appeared in 41.4% of H. diminuta WMS „strain" tapeworms and in only 24.6% of tapeworms coming from H. diminuta WMS il1. In tapeworms with unilateral as well as with variable PGP deriving from H. diminuta WMS il1, the average number of type 0p3a proglottids (all three testes on the aporal side) was significantly higher than in H. diminuta WMS „strain". It results most probably from suitable selection of mother specimens for successive generations of H. diminuta WMS il1. In both compared groups the growth of the number of PGP changes was correlated positively with the number of type 2p1a proglottids and negatively with the numer of type 1p2a and 0p3a proglottids.
14

Variability of the position of organs in Hymenolepis diminuta tapeworms at different ages

100%
Stradowski M.
Acta Parasitologica
|
1993
|
tom 38
|
nr 1
Hymenolepis diminuta tapeworms of the WMS "strain", obtained at 1 month and at 2.5 months after the administration to rats of cysticercoids, showed a right-hand side position of the genital pores (PGP). In the 5th month of infection strobilas of variable PGP were also found to appear. These two types of strobilas (of right-hand side and variable PGP) appeared till the end of the observation period in the 23rd month after the infection of rats. It was established that the variability of PGP depends on the duration of the infection and not on the age of the final host. Apart from typical proglottids containing 1 testis on the poral side and 2 testes on the aporal side (lp2a) there were also proglottids of the following numbers and placement of testes (NDT): 0p0a, 0pla, 0p2a, 0p3a, 0p4a, 0p5a, 1p0a, 1p1a, 1p3a, 1p4a, 1p5a, 2p0a, 2p1a, 2p2a, 2p3a, 2p4a, 3p0a and 3p1a. Correlation was established between the frequency of occurrence of PGP changes and the number of proglottids with the following NDT: 1p2a, 2p1a, 3p0a, 3p1a and all deviations from 1p2a.
15
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Biologiczne i anatomo-morfologiczne wlasciwosci tasiemcow Hymenolepis diminuta wms il1 i wms "strain"

51%
Stradowski M., Grytner-Ziecina B., Rebandel H.
Wiadomości Parazytologiczne
|
2001
|
tom 47
|
nr 3
279-283
Crowded infrapopulations of H. diminuta obtained from the WMS i11 inbred line resembled those of the potentially non-inbred WMS strain in not showing either the abrupt reductions in the numbers of worms or the destrobilation described by other autors. Denser populations of both types of tapeworm have a greather abundance of 4 - testis proglottids of the lp3a type (having 1 testis on the poral side and three on the aporal), and fewer of type 0p3a. Changes in the positioning of genital ducts and pores show a marked positive correlation with the abundance of type 2pla proglottids. Strobilae of H. diminuta WMS i11 contain a relatively greather number of type 0p3a proglottids and fewer of type 1p3a, than those of the WMS „strain"; something which is probably linked with the respective selection of the maternal Tapeworms.
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