منابع مشابه
Studies of the Distribution of Poliomyelitis Virus
The occurrence and duration of the carrier state in familial associates of recognized cases of poliomyelitis was studied by the examination for virus of stool specimens collected from the members of four families at regular intervals for a period of over 2 months. The results indicate that: (1) virus may persist in their stools continuously for 4 to 5 weeks; (2) virus may be encountered intermi...
متن کاملSeasonal distribution of abortions.
At least one pregnancy in eight terminates in an abortion recognized as such and recalled by women when asked for a pregnancy history (McDonald, 1958; Warburton and Fraser, 1964). Some women have a greater tendency to abort than others (Warburton and Fraser, 1964) and a few abort repeatedly (Eastman and Hellman, 1961). Gross fetal malformation undoubtedly accounts for some spontaneous abortions...
متن کاملSeasonal distribution of antiphospholipid antibodies.
BACKGROUND AND PURPOSE The purpose of this study was to determine if there was a seasonal variation in antiphospholipid antibody (aPL) titers and whether this variation differed between stroke cases and control subjects. METHODS IgG and IgM anticardiolipin and antiphosphatidyl serine antibody titers were obtained on serum samples from 884 stroke patients and 1024 control subjects over a 7-yea...
متن کاملSeasonal distribution of myocardial infarction and seasonal mood changes.
REPLY We thank Kok, Umans, and Arnold for their statistical calculations. Indeed, a large sample size would be required to prove that there is equivalence in clinical outcome between patients directly admitted compared to transferred patients. To demonstrate that the six-month mortality rate would not exceed more than 1% (6% vs. 7%) would require a sample size of even more than 25,000 patients!...
متن کاملSeasonal distribution of mycobacterial skin ulcers.
Chronic necrotizing skin ulcers caused by Mycobacterium ulcerans are a common and serious disorder in certain parts of the tropics. This infection was first described in Australia, but most of the reported cases have come from Uganda (where the disease is known as Buruli ulcer) and from the Congo. The disease is also known to occur in Nigeria, Ghana, Mexico, and New Guinea. The results of epide...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: American Journal of Public Health and the Nations Health
سال: 1950
ISSN: 0002-9572
DOI: 10.2105/ajph.40.10.1296