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HomeMy WebLinkAbout02-11-1965 Board of Health MinutesFebruary 1965 The Plainview Hale County Board of Health met 11 February 1965 at the Alcove Restaurant, Dr. Randall Heye presiding. Mosquito's, Migrant Health gin managers meeting and plans for a Health Department building were topics pre- sented for the Board's discussion and comideration. After lengthy discussion on how to obtain maximum results with minimum available funds for Mosquito Con- trol, Ray Blair made the motion that the Board wtite a letter to the Commissioner's Court recommending an early larviciding program to begin as soon as possible. Oliver Harmel second the motion...Motion carried. Tentative date for the Migrant meeting was set for 18 March at the Farm Bureau conference room. The Board would be advised, by letter, confirming definate date. Dr. Heye requested Marshall Pharr to work with Dr. Marshall in preparing an outline of plans meeting the Hill -Burton requirements for a Health Department build- ing. If possible, a pelimtnary report to be made at the March meeting. Currant bills were presented. Edgar Brown moved bills be approved..second Ray Blair. .motion carried. , Meeting adjourned. Members attending; Dr. Heye, Mayor Hood, Ray Blair, Oliver Harmel, Edgar Brown, Dr. Marshall, Judge Abernethy, Dr. Ray Freeman, Mar- shall Pharry Respectfully submitted, Mary Wadzeck, secretary Bier ,iVremali aiazeuo, Pla.i:nvie Texas h4, 1965 The Commissioner's Court Hale County Courthouse Plainview, Texas Dear Commissione Mosquito's and what to do ab sut them, cont- inue to be an area of concern for all of us. Realizing our mi tual problem of how best to obtain the maximum results with limy ited funds was discussed at the last regular meeting of The Board of Health (February 11, 19(5}. Thevloard voted to make the fol. lowing recommendation to your courts to institute, as soon as possible, an early larvaasid.ing program. we are Thanking you, as always for you: 0 PY Plainvie -Ha le Board of Health MaryWadseck, sec. Tentative Outline Arbovirus Investigations Disease Ecology Section, PHS, CDC - 1965 Ecological and Epidemiological Studies in Hale County, Texas This will be a cooperative endeavor between the Texas State Department of Health, the Plainview -Hale County Health Department, and the Kansas City field stations of CDC° Intensive prospective study of human cases of acute febrile CNS disease 1. Search for human cases will be initiated early in the season, and close liaison will be maintained with local physicians, clinics, and hospitals throughout the season. Paired sera and cerebrospinal fluid will be collected from all suspect cases; and central nervous system tissue, liver, and pancreas will be collected from all fatal cases The Kansas City Field Station will collaborate in the study of cases with CNS involvement which are not caused by arboviruses. For this purpose, stools or rectal swabs and throat swabs will be collected from each suspect case. Acute and convalescent sera from suspect human cases will be Greeley and centrifuged at Plainview and then shipped to the Greeley Laboratory for subdividing and subsequent testing. They will be tested on a current viruses. basis for HI antibodies against WE, SLE, and California Positives will be confirmed by neutralization tests. Negative specimens may be tested at a later date by CF test for Hart Park, Cache Valley, and arboviruses. Cerebrospinal fluids and tissues from fatal suspect human cases will also be shipped to the Greeley Laboratory. 2 These together with acute serum specimens will be tested in DETC and suckling mice for 4E, SLE, and other arboviruses. Stools, rectal swabs, and throat swabs will be shipped to the Kansas City Laboratory, where they will be tested for upper respiratory viruses, enteroviruses, or other etiologic agents. B. Retrospective study of WE and SLE immunity rates A pre- and post -epidemic series of the human sera from Hale County will be tested for WE and SLE antibodies by HAI and neutralization test. C. Observations on equine encephalitis Reports will be obtained from all Hale County veterinarians of suspect cases of equine encephalitis. A representative series of paired acute and convalescent sera will be tested for HAI antibodies against WE and other selected arboviruses. D. Sentinel flocks 1. Standard sentinel flocks will be maintained at 4 sites in Hale County and possibly at 2 sites in Lubbock County. At least 2 of the flocks will be bled at weekly intervals and tested for WE and SLE antibodies. 2. During the peak of the transmission season consideration will be given to supplementing the routine flocks by exposure of additional non- immune chickens. E. Mosquito studies 1. Mosquito population indices will be obtained from light and shed traps at the four sentinel sites and from red boxes and NRP's. Shed and light trap collections will be kept separate from red box and NRP collections, and gravid, engorged, and deplete specimens will also be separated. DES 11/16/64 3 2. Each week from July throuf t October, 25 Pools of Culex tars itis will be collected and tested on a current basis in ,,ETC for WE virus. An aliquot of each pool will be held for 1<:ater testing for SLE virus. IDurira the sae period approximately 100 pools each , f P.: orophora signipennis, Culex quin ,uefasciatus n and Aedes nigromac:. will be collected .snd stored in the Revco for r.oasible future testing in suck1ins saice. Collections of Anr,pha1es will <=,Iso he obtained if this st•:ecies is available. 3. During March thronat;i June r, and Hove. ,ber through December, approximately 150 pools of Culex quinquefaaciatus, C. tarsalis, Culiseta inornata, and any other available adult +:=•-aquitoas will be collected and stored in the Revco for future virus tests, 4. Fifty engor_ed specimens of =.11 available mosquito spegies will be collected e ch r;+.oath fro ru M rrch throe „h September rind shipped to the School of Pu.•lic Health akaley for precipitin tests to determine sources of blood eeals, F. Reptile atu ies 1, intensive collection of arr.rkes will be initiated in the spring of 1965 as soon ;::a they be in emerging from hibernation. One hundred specimens of Thar..nophia will be collected and bled Immediately. They will then be held in storage cages at Plainvie a bled it three subsequent intervals (to be decided upon later) All blo<. will be tested in DETC <.;nly, primarily for E virus, Any ectom ` parasites found on the captured snake; will be removed and tested for WE virus DES 11/16/64 4 2. Approximately 100 other reptile specimens (Hetes an, Pituophis, P—�n_ asoma, etc.) will be collected and processed as under item 1 above. 3. Preliminary field observations will be made in the late fall and early spring months to determine what kinds of mosquitoes, Culicoides, or other blood -sucking insects may be attracted to anake-baited traps. C. Bird and mammal studies 1. A weekly census will be made of bird populations in the study area from mid-June through September and observations will be made upon nestlings and fledglings of the more common species. Attention will also be given to patterns ofbird migration in and out of the study area. 2. Routine trapping and transect indices will be obtained on small mammal populations from mid-June through September. Observations will be made of breeding periods and the emergence of young from their nests. Near the end of the transmission season, sera will be col- lected from about 50 specimens each of young -of -the -year jack rabbits and cottontails and tested for WE and SIE antibodies. H. Experimental control studies 1. Twenty representative farmsteads in the endemic area of Hale County will be used for experimental control studies. Ten of these will be selected at random and treated in May with outdoor residual sprays of DDT. Thirty six -week-old chickens will then be released on each of the 20 farms. In the fall (October) the chickens will be bled and • DES 11/16/64 I. 5 tested for WE and SLE antibodies to determine if there were any significant differences in transmission on the treated and un- treated farmsteads. Serum specimens will also be collected from all of the humans on each farmstead in the spring and fall. These paired sera will be tested for WE and SLE antibodies to determine if there were differences in the conversion rates on the treated and untreated farmsteads. Overall plan of participation in Hale County studies The State Health Department will provide the overall coordination of activities, including the cooperative studies being carried out in Lubbock County, and will conduct any supplemental field or laboratory studies which appear to be indicated. The Plainview -Hale County Health Department will serve as the focal point for the investigations. It will actively solicit prompt reporting of all suspect cases from physicians, clinics, and hospitals, and will handle public relations and publicity releases. CDC will: (1) collect, process, ship, and test all sera and other specimens from human suspect cases, and will transmit weekly reports of the results to the City -County Health Department with copies to the State Health Department and the referring physician; (2) collect and test avian sentinel sera, mosquito pools, and blood and other tissues from wild vertebrates; (3) obtain seasonal population indices for mosquitoes, wild birds, and mammals; and (4) conduct and evaluate experimental control studies.